Application Analysis of Intelligent Pressure Transmitter

Posted on March 17, 2020 by KimGuo11

Intelligent Pressure Transmitter is also called smart pressure transmitter.

Industrial Process Pressure Transmitters

Current intelligent pressure transmitters are generally hybrid intelligent pressure transmitters that have both digital and analog signals. Communication with DCS is mainly based on passing 4-20mA analog signals. Then superimpose digital signals on them for remote Set the zero point, range, and calibration, configuration, and diagnostics of the transmitter. It is only designed to be compatible with the existing DCS. Smart pressure transmitter is a transition product of true all-digital smart pressure transmitter (such as field bus type intelligent pressure transmitter).

As far as the composition structure of intelligent pressure transmitters widely used in the market is concerned, it mainly includes devices such as microprocessors, sensors, digital-to-analog converters, and memories. Different devices play different automatic control functions. The sensors are mainly aimed at The measured signal is detected. There are some differences in the materials designed in the specific application. As the core part of the entire device, the microprocessor is mainly used for comprehensive analysis and calculation of the relevant data collected by the device. Unit conversion, fault diagnosis, range adjustment, function calculation, etc. are performed for the detection signal. The function of the memory is to implement the configuration for the relevant data and programs in the microprocessor. At present, most of the memory used by people have the function of rewriting and adjusting. Related converters are mainly responsible for the interchange of digital signals related to analog signal machines. Smart pressure transmitters can communicate with DCS by outputting a series of digital signals. A reserve power supply is also set in the transmitter, which can prevent the memory data from being lost in the event of a power failure. According to the different types of sensors used in smart pressure transmitters, the transmitters can also be classified into capacitive, diffused silicon strain, and diffused silicon resonant types.

Featured Smart Pressure Transmitters

**Diffused silicon Gauge Pressure Transmitter**
A gauge pressure (GP) transmitter compares a process pressure against local ambient air pressure. Gauge pressure transmitters have ports to sample the ambient air pressure in real-time.

**High-Temperature Pressure Transmitter**
**High-temperature pressure transmitters** with a 4-20mA output.
which has a temperature capability of over 700 °C and is not pyroelectric.

**Explosion-proof Pressure Transmitter**
Explosion-proof Pressure transmitter, or explosion-proof pressure transducer, with the explosion-proof enclosure.
For applications in hazardous areas.

**Diaphragm Seal Pressure Transmitter**
When the process medium should not come into contact with the pressured parts of the measuring instrument. Diaphragm sealed pressure transmitters are used for pressure measurement.

**Hygienic / Sanitary Pressure Transmitter**
Also called Hygienic pressure Transmitters, or tri clamp pressure transmitter. Sanitary pressure Transmitters is used to food &beverage or pharmaceutical application.

**Capacitive Gauge Pressure Transmitter**
Gauge pressure (GP) transmitters compare process pressure with local ambient air pressure. Gauge pressure transmitters have ports for real-time sampling of ambient air pressure.

**Absolute Pressure Transmitter**
Absolute pressure transmitter with 4-20mA output for measuring pressure with absolute type reference. Absolute pressure (AP) transmitter is a measure of the ideal (complete) vacuum pressure.

**Hydrostatic pressure transmitter**
Hydrostatic pressure transmitter is used for fluid hydrostatic pressure measurement. With working static pressure up to 32Mpa, for liquid, gas or steam .

Function of Smart Pressure Transmitters

Type: Pressure- Differential(DPIT), Gauge/ Absolute(PIT), Level(LIT), High Static Pressure, Flow Pressure(FIT)
Certificate: SIL2 (TUV, FMEDA), Ex d, Ex ia, FM, ATEX, TR CU(EAC), INMETRO, CE, Rohs, BV, LR, KR, DNV, ABS, KCs, IP66/67, NEMA 4X
Feature: 4 to 20mA, HART, Loop Powered
Accuracy: ± 0.075% (option ± 0.04%) of CS* 3 lines LCD display, Self Diagnostic Function, External Buttons, DAC, Zero Trim, Eng mode
Application: Pressure, Flow, Level measurement for Oil & Gas, Liquid, Water, Maine & offshore, Vessel, Power, Chemical Plants and Refinery

More about: Absolute Pressure Vs Gauge Pressure.

Hydrostatic pressure for level measurement:

SMT3151TR Hydrostatic level transmitter-Rod Type

Main Features of Smart Pressure Transmitters

Compared with conventional analog transmitters, smart pressure transmitters have many characteristics. Take Rostman smart pressure transmitters as an example. The characteristics of this pressure transmitter are mainly concentrated on the following points:

1. Wide range and large range ratio

Intelligent pressure transmitters generally have a wide measuring range. The measuring range ratio is large, from 30: 1 to 100: 1, and some even reach 400: 1. The measuring range ratio of the transmitter refers to the maximum measurement range (URV) and the minimum measurement Range (LRV) ratio. Because the intelligent pressure transmitter has a wide measuring range, compared with conventional analog pressure transmitters, the biggest advantage is that it can reduce the inventory. At the same time, according to the process requirements, the measuring range can be changed at any time without following the meter change, without having to change the meter. Don’t worry about exceeding the range.

2.Simple and convenient maintenance

The handheld communicator can be used to communicate with the intelligent pressure transmitter at the terminal of the field transmitter or at the terminal in the control room of the main control room. In this way, the instrument maintenance personnel can perform range modification, parameter setting, and instrument maintenance on the transmitter in a relatively safe and relatively good control room.

3.With high and low voltage side conversion function

Intelligent pressure transmitters generally have high- and low-pressure side conversion functions of the sensor, and the internal parameters can be adjusted with a handheld communicator. I encountered such a problem in production. Because the meter has been running for many years, the pressure guiding tube connected to the transmitter needs to be replaced due to leakage. When the meter is put into operation after replacement, it is found that the positive and negative phase pressure guiding tubes are reversed (because the pressure guiding tube is long , And there is a heat tracing tube together, the positive and negative phases are easily reversed). The intelligent pressure transmitter has high and low pressure side conversion functions, as long as the parameter items in the table are changed from NORMOAL (high pressure on the right side, low pressure on the left side) to REVERSE (low pressure on the right side, high pressure on the left side). After reconfiguring the table, Everything works fine, saving time and effort.

4. With fixed output function

This function is more convenient to use in the following situations: When the transmitter fails, in order to ensure the safety of production equipment and personnel, or to ensure product quality, the transmitter output needs to be a fixed value. After the annual overhaul, due to the meter All links in the control circuit have been overhauled. The entire circuit needs to be co-calibrated before driving. At this time, the fixed output function of the intelligent transmitter can be used by the hand programmer. Generally, any value between 3.8-21.6mA can be set, and the whole circuit where it is located is cascaded.

In addition, the intelligent pressure transmitter has the characteristics of high accuracy, good stability and high reliability.

Extended Reading: Selection of pressure transmitter

Application Analysis of Intelligent Pressure Transmitter

Used as a reminder of impulse pipeline problems

In general, the intelligent pressure transmitter is connected to the process through a small-diameter pipe, and this management is the impulse pipeline. In some applications, such impulse lines may be blocked by materials or frozen due to cold weather. These blockages may cause difficulties in transmitting pressure signals. In this case, the use of conventional pressure transmitters cannot be used to understand this clogging problem. The main reason is that in the case of a blockage problem, there is a certain difference between the signal indicated by the transmitter and the signal provided before the blockage occurred. It must be ensured that the output of the transmitter does not change with the actual flow rate change before it can be found The problem. It has been found in practice that if one or two impulse lines are blocked during some flow measurement processes, the standard deviation at a specific flow will change greatly. The intelligent pressure transmitter can effectively detect such changes. In this way, the blocking position of the impulse pipeline can be controlled in time, which facilitates fault finding and avoids increasing problems.

For flame instability detection in refining furnaces

In many chemical fields, refining furnaces are important equipment. Incineration of different chemical production waste gases is required. Because many BTUs coexist, the flame stability is not very good, which is also an important sign that the refining furnace is out. The application of intelligent pressure transmitter can measure the noise of the fire control pressure in the room. The transmitter can be used to detect the flame stability. The general measurement accuracy is relatively high, and it can detect the abnormal signal in the refining furnace. . Convenient staff to correct equipment problems in time to avoid flameout.At present, smart pressure transmitters are also used in related fields to a certain extent, which belongs to the category of precision instruments. In many fields of application, smart pressure transmitters can accurately detect related signals and data information, find abnormalities in time, and facilitate Find and repair the corresponding faults. It is helpful to reduce system failures and improve system operation efficiency.

Q&A

What is smart pressure transmitter?

Digital smart pressure transmitter is pressure sensor with a 12-bit or higher microprocessor. Smart pressure transmitters are high performance microprocessor-based transmitters with flexibility. Pressure calibration and output, automatic compensation.
Smart pressure transmitter also called intelligent pressure transmitter.
The intelligent pressure transmitter consists of two parts: a smart sensor and a smart electronic board.
The smart sensor part includes: a capacitive sensor. A measuring diaphragm detection circuit. A temperature sensor, and a temperature compensation circuit.
The smart electronic board includes: a microcomputer controller. And the peripheral circuit, complete the pressure signal to 4 ~ 20mA dc conversion.
Smart Pressure Transmitter is used to measure the pressure of liquid, gas or steam. And then convert the pressure signal into 4 ～ 20mA DC signal output. The intelligent pressure transmitter produced by Sino-Inst can communicate with the HART communicator. It is widely used in weakly corrosive liquids in industrial pipelines, Gas and steam measurement and control systems.
Extended reading: How to calibrate HART pressure transmitters

What is the principle of pressure transmitter?

Like other transmitters, a pressure transmitter consists of electronics connected to a sensor. We can find transmitters with many types of pressure sensors on the market – capacitive, piezoelectric, resonant silicon, and more.
So pressure applied to capacitive cells will produce a change in the capacitance of the sensor. This change will affect the oscillator frequency, and the pressure transmitter will detect this change. Then the transmitter translates this data into a standard output signal that we can read.
Using a local setup or a handheld, you can adjust the transmitter, changing information like the unit, measuring range, and output.
More: How does a pressure transmitter work

How do you calibrate a smart transmitter?

To perform the test:
1. Isolate the transmitter from the process being measure and its loop wiring. If measuring the mA signal across the transmitter test diode leave the wires intact, but note this method does not give the best mA measurement accuracy.
2. Connect the mA measurement jacks of the 754 to the transmitter.
3. Connect the pressure module cable to the 754 and connect the transmitter test hose from the hand pump to the transmitter.
4. Press the HART button on the calibrator to see the configuration of the transmitter.
5. Press HART again and the calibrator will offer the correct measure/source combination for the test. If documenting the calibration press As-Found, input the test tolerance and follow the prompts. If the measured mA signal at the test points is found within tolerance the test is complete. If not, adjustment is required.
6. Select, adjust, and trim the pressure zero, mA output signal and input sensor.
7. After adjustment select As-Left, document the condition of the transmitter and after adjustment and if the test passes, it is complete.
More: Pressure Transmitter Calibration

How do you calibrate a pressure transmitter with HART Communicator PDF?

The basic procedure for calibration
1. Isolate the Pressure Transmitter from the Process.
2. Slowly open the vent plug and the vent valve to release the pressure.
3. Connect the multimeter with the transmitter and ensure that output is 4ma when 0 pressures are applied.
4. Connect the handheld test pump (pressure source) to the transmitter.
5. Ensure there is no leak.
6. Apply pressure range at 0%, 25%, 50%, 75%, 100% and check there is any error.
7. If there is any error calibration should be done.
Extended reading: Smart Differential Pressure Transmitter

KimGuo11

Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.

Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.

drurylandetheatre.com

Industrial Pressure Transmitters

Posted on March 7, 2020 by KimGuo11

Industrial pressure transmitters for the process pressure measure, monitor and control application.

Industrial pressure transmitters are sensors with electrical transmission output for remote indication of pressure. Process transmitters differentiate themselves from pressure sensors through their increased range of functionality.

They feature integrated displays, offer high measuring accuracies and freely scalable measuring ranges. Communication is via digital signals, and waterproof and explosion-proof certifications are available. Through connection to diaphragm seals, they are suitable for the harshest operating conditions. Ideal for OEMs, process applications, water processing, and industrial pressure applications.

Sino-Inst offers a variety of pressure senors for industrial pressure measurement. If you have any questions, please contact our sales engineers.

Featured Industrial Pressure Transmitters

**Remote Diaphragm Seal Pressure Transmitter**
Remote seal pressure transmitter, with capillary and diaphragm seal, remote mount. Diaphragm seal systems protect pressure transmitters from hot, viscous, contaminated or corrosive media.

Sino-Inst also provides repair services for Industrial pressure transmitters. Such as WIKA, Rosemount, and other brands of pressure transmitters.

What is a smart pressure transmitter?

Smart pressure transmitter also called intelligent pressure transmitter.

The intelligent Industrial pressure transmitters consist of two parts: a smart sensor and a smart electronic board.

The smart sensor part includes: a capacitive sensor. A measuring diaphragm detection circuit. A temperature sensor, and a temperature compensation circuit.

The smart electronic board includes: a microcomputer controller. And the peripheral circuit, complete the pressure signal to 4 ~ 20mA dc conversion.

Smart Industrial pressure transmitter is used to measure the pressure of liquid, gas or steam. And then convert the pressure signal into 4 ～ 20mA DC signal output. The intelligent pressure transmitter produced by Sino-Inst can communicate with the HART communicator. It is widely used in weakly corrosive liquids in industrial pipelines, Gas and steam measurement and control systems.

Industrial pressure transmitters Working Principle

Principle and Application of Diffusion Silicon Pressure Transmitter

The pressure of the measured medium directly acts on the diaphragm of the sensor (stainless steel or ceramic). Causing the diaphragm to generate a micro-displacement proportional to the pressure of the medium. The resistance value of the sensor changes. The electronic circuit detects this change and converts and outputs a standard measurement signal corresponding to this pressure.

Principle of capacitive pressure transmitter

Capacitive pressure transmitter is mainly composed of capacitance sensor and circuit board. The sensor implements pressure-capacitance conversion. The circuit board converts the capacitance to a two-wire 4-20mA.

When the process pressure is applied to the isolation diaphragm from both sides (or one side) of the measuring chamber, it is transferred to the central diaphragm of the chamber through the silicone oil filling liquid. The central diaphragm is a diaphragm with tensioned edges.

Under the action of pressure, a corresponding displacement is generated. This displacement creates a change in differential capacitance!

And through the adjustment, oscillation and amplification of the electronic circuit board! Converted into 4-20mA signal output! The output current is directly proportional to the process pressure!

How Does a Pressure Transmitter Work?

Types of Pressure Transmitters

Depending on the type of pressure to be measured:

Pressure transmitter types include gauge pressure, absolute pressure, and differential pressure. Gauge pressure refers to the pressure that is less than or greater than atmospheric pressure based on the atmosphere. Absolute pressure refers to the absolute zero pressure as the reference and is higher than the absolute pressure. Differential pressure refers to the difference between two pressures.

According to the working principle of the Industrial pressure transmitters:

Strain Gauge Pressure Transducers
Capacitance Pressure Transducers
Potentiometric Pressure Transducers
Resonant Wire Pressure Transducers

Electrical Output of Pressure Transducers

Pressure transmitters are generally available with three types of electrical output. Millivolt, amplified voltage and 4-20mA. Below is a summary of the outputs and when they are best used.

Extended Reading: 4-20ma pressure transducer wiring diagram

Millivolt Output Pressure Transducers

A sensor with a millivolt output is usually the most economical pressure sensor. The output of a millivolt sensor is nominally about 30mV. The actual output is proportional to the input power or excitation of the pressure sensor. If the stimulus fluctuates, the output will change.

Because of this dependence on the level of excitation, a regulated power supply is recommended for millivolt sensors. Because the output signal is so low, the transducer should not be placed in an electrically noisy environment. The distance between the transducer and the reading instrument should also be kept relatively short.

Voltage Output Pressure Transducers

Voltage output transducers include integral signal conditioning, which provides higher output than millivolt transducers. The output is usually 0-5Vdc or 0-10Vdc. Although model-specific, the output of the transducer is usually not a direct function of the stimulus. This means that as long as the regulated power supply falls within the specified power range, it is usually sufficient. Because of their higher output levels, these sensors are not as susceptible to electrical noise as millivolt sensors and can therefore be used in more industrial environments.

4-20 mA Output Pressure Transducers

These types of sensors are also called pressure transmitters. Because 4-20mA signals are least affected by electrical noise and resistance in the signal line, these sensors are best used when signals must be transmitted over long distances. These sensors are typically used in applications where the lead must be 1000 feet or more.

Industrial Applications of Pressure Transmitters

Pressure transmitters are mainly used in the following areas:

Petroleum, petrochemical, chemical. Matching with throttling devices to provide accurate flow measurement and control. Measures pressure and level in pipes and tanks.
Electricity, city gas. And other companies and businesses require high stability and high precision measurement and other places.
Pulp and papermaking are used in places that require chemical-resistant liquids and corrosion-resistant liquids.
Steel, non-ferrous metals, and ceramics are used in furnace pressure measurement and other places that require high stability and high precision measurement. They are also used in places that require stable measurement under strict control (temperature, humidity, etc.).
Machinery and shipbuilding, used to strictly control the place where high precision is required for stable measurement.

Hydrostatic pressure for level measurement:

Pressure Transmitters VS Pressure Sensors VS Pressure Transducers

A pressure sensor is a device or device that can sense a pressure signal and convert the pressure signal into a usable output electrical signal according to a certain rule.

A pressure sensor usually consists of a pressure-sensitive element and a signal processing unit. According to different test pressure types, pressure sensors can be divided into gauge pressure sensors, differential pressure sensors and absolute pressure sensors. A pressure sensor is the core part of pressure transmitter.

In a pressure transducer, a thin-film or piezo-resistive pressure sensor is mounted on a process connection. The transducer converts pressure into an analog electronic output signal, typically as a millivolt per volt output. These signals are not linearized or temperature compensated.

A pressure transmitter has additional circuitry that linearizes, compensates, and amplifies the signal from a transducer. The different signal types are typically voltage signals (eg, 0 to 5 or 0 to 10 volts), milliamp (eg, 4 to 20 milliamp), or digital. The instrument then can transmit the signal to a remote receiver.

If you still don’t know how to choose the right pressure transmitter. Please feel free to contact our sales engineers. We will provide you with the best pressure measurement and control solution.

Guidelines for Troubleshooting Pressure Transmitters

Transmitter output signal is unstable or output is zero
High or low mA reading
The input pressure does not respond or the transmitter does not return to zero after the pressure is released.
The degree of pressure variable is low or high

When this happens, you should consider: Is the pressure source itself stable? The degree of anti-interference ability of the instrument or pressure sensor. Is the sensor wiring normal? The sensor itself is vibrating and the cause of the failure. Is the polarity of the power supply reversed?

Check the degree of pressure variable; make 4-20mA output adjustment.

Check the transmitter’s power supply voltage, calibration equipment and set values (4mA and 20mA points). Check whether the pressure interface is leaking or blocked. Check the wiring mode and power supply. If normal, check if the sensor has zero output. Or Perform a simple pressurization to see if the output changes. If there is a change, the sensor is not damaged.

Check if pressure transmission is blocked; check calibration equipment and adjust sensors; check vehicle damping and electromotive force interference.

Frequently
Asked
Questions

Help Center

1. Do a 4-20mA trimming first to calibrate the D / A converter inside the transmitter. Since it does not involve sensing components, no external pressure signal source is required.

2. Do a full fine-tuning again to make the 4-20mA, digital reading coincide with the pressure signal actually applied. So a pressure signal source is needed.

3. Finally, do the re-ranging, and adjust the analog output 4-20mA to match the external pressure signal source. Its role is exactly the same as that of the zero (Z) and range (R) switches on the transmitter housing.
The communicator can change the range of the intelligent pressure transmitter. And can adjust the zero point and the range without inputting a pressure source. However, this method cannot be called calibration and can only be called “setting the range”. True calibration requires a standard pressure source input to the transmitter.

Adjusting the range (LRV, URV) without using a standard is not calibration. And ignoring the input part (input transmitter pressure) for output adjustment (transmitter conversion circuit) is not a correct calibration. Furthermore, the relationship between the pressure and differential pressure detection components, the A / D conversion circuit, and the current output is not equal. The purpose of calibration is to find the changing relationship between the three.
Emphasize one point:
Only when the input and output (input transmitter pressure, A / D conversion circuit, loop current output circuit) are debugged together, can it be called a true calibration.

First of all, the parameters that must be seen when purchasing a pressure transmitter are:
Pressure range. Range. Measurement medium. Installation method-threaded flange clamps, etc. Installation dimensions. Temperature. Whether with display. Whether with HART protocol. Output type. Current output or voltage output. Explosion-proof level, protection level. Accessories. Mounting bracket.
The above parameters will affect the price of the pressure transmitter.
Sino-Inst, as the manufacturer of pressure transmitter, offer you with the best price.

The input of the pressure transmitter is a pressure signal. The function of the pressure transmitter is to convert the pressure signal input from the outside into a current or voltage signal.

A pressure transmitter is a device that converts pressure into pneumatic or electric signals for control and remote transmission.

It can convert physical pressure parameters such as gas and liquid sensed by the load cell sensor into standard electrical signals (such as 4~20mADC, etc.). Measurement, indication and process adjustment are carried out by supplying secondary instruments such as indicating alarms, recorders and regulators.

Related Products

**SI-512H High Temperature Pressure Sensor**

**High Frequency Dynamic Pressure Sensor**

**SI-706 Combined Pressure and Temperature Sensor-Dual function**

**Extended Diaphragm Seal DP Level Transmitter**

**Remote Seal Differential Pressure Transmitter**

**Differential pressure(DP) level transmitter**

**Flange Mounted Differential Pressure Transmitter**

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Sino-Inst offers over 20 industrial pressure transmitters.
A wide variety of industrial pressure transmitters options are available to you. Such as free samples, paid samples.
Sino-Inst is a globally recognized manufacturer of industrial pressure transmitters, located in China.
Sino-Inst sells through a mature distribution network that reaches all 30 countries worldwide.
Industrial pressure transmitters products are most popular in Europe, Southeast Asia, and Mid East. You can ensure product safety by selecting from certified suppliers. With ISO9001, ISO14001 certification.

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KimGuo11

drurylandetheatre.com

Industrial Pressure Sensors

Posted on March 4, 2020 by KimGuo11

Insutrial pressure sensor for the pressure measurement application.

A pressure sensor converts the physical quantity ‘pressure’ into an industry-standard electric signal. Sino-Inst manufactures pressure sensors ranging from the sensing element to system packaging. Based on piezoresistive Micro-electromechanical systems and silicon strain gauge , our sensors measure from 20inWc … 200,000 psi. We can also build custom sensors to meet your specific needs. Our product portfolio covers a wide range of pressure sensors. Suitable for refrigeration and air conditioning applications, the food industry, mobile work machines, medical gas and semiconductor industries.

Sino-Inst offers a variety of pressure senors for industrial pressure measurement. If you have any questions, please contact our sales engineers.

Featured Industrial Pressure Sensors

**SI-303 Low-Pressure Transducer**
Low pressure transducers for air and non-corrosive gases low pressure measurement. 0 ～ 2.5kPa to 0 ～ 30kPa measurable.

**SI-350 Sanitary Pressure Transmitter**
Sanitary Pressure Transmitter, also called tri clamp pressure transmitter,
is the pressure transducer with the flush diaphragm (flat membrane) as the pressure sensor.

**SI-300 Pressure Transducer 4-20mA/Voltage**
The 4-20mA/ Voltage Pressure Transducer,
also called pressure transmitter 4-20mA,
is a pressure sensor with4-20ma/Voltage output.

**SI-390 Industrial Pressure Transmitter**
Pressure transmitters for general industrial applicaitons. -0.1kPa ~ 0 ~ 0.01kPa ~ 100MPa ~150MPa. 0.1% FS, 0.25% FS, 0.5% FS. 4-20mA (2-wire system), 0-5 / 1-5 / 0-10V (3-wire system)

**SI-520 Digital Pressure Sensor**
Digital Pressure Sensor is particularly suitable for use in computer control systems. RS485 half-duplex working mode.

**SI-302 OEM pressure sensor**
OEM pressure sensors from Chinese manufacturer. Silicone filled. Protected by stainless steel diaphragm. Suitable for a variety of fluid media.

**SI-703 Flush diaphragm pressure sensor**
Flush membrane / diaphragm structure, anti-blocking design. Pressure measurement of viscous media.

**SI-10 Liquid pressure sensor**
Liquid pressure sensor is widely used for pressure measurement of various liquids. Like water or oils. IP68 waterproof.

**SI-PT series Melt Pressure Sensors/Transducers – High Temperature**
SI-PT series melt pressure sensors work for high temperature melt pressure measurement and control.

**SI-503K Gas Pressure Sensor**
Gas pressure sensor for industrial gas pressure monitoring. Pagoda gas nozzle Φ8. Such sensors are also commonly referred to as wind pressure transmitters, exhaust pressure sensors.

**SI-702 High Pressure Sensor**
High pressure sensor is pressure transmitter designed for high pressure measure&control. 0 ～ 40MPa… 600MPa. M20 × 1.5, G1 / 2 (others are customized according to requirements)

**SI-702S Ultra-High Pressure Senors**
Pressure sensor for Ultra high pressure applications. Ultra high pressures up to 15,00MPa. 0-2000MPa to 0-7000MPa (customized).Ball head M20 × 1.5, cone head M20 × 1.5.

**SI-512H High Temperature Pressure Sensor**
High Temperature Pressure Sensor for pressure measurement of high temperature gas or liquid. Such as steam pressure. High temperature up to 800 ℃.

**SIJC-1000HSM-Silicon Pressure Sensor**
silicon pressure sensor, also known as Diffused silicon pressure sensor. Silicon pressure sensors are low cost.

**SI-706 Combined Pressure and Temperature Sensor-Dual function**
Combined pressure and temperature sensor for Simultaneous measurement of pressure and temperature.
Thermocouple types: J, K, E type or PT100 platinum resistance. Two outputs do not affect each other.

**SI-338 Ceramic Pressure Sensor**
Ceramic pressure sensor is a pressure sensor refined from a thick ceramic base using a refined ceramic base. Cost-effective. Support OEM processing. 0-0.2MPa -…- 40MPa

**SI-51 Miniature Pressure Sensor/Transducer**

**Pressure Sensor | Designed for Shield boring machine-Earth compactor-Grouting machine**

A pressure sensor is a device for pressure measurement of gases or liquids. Pressure sensors can also be used to indirectly measure other variables such as fluid/gas flow, speed, water level, and altitude. Pressure sensors can alternatively be called pressure transducers, pressure transmitters, pressure senders, pressure indicators, piezometers and manometers, among other names.

From Wikipedia : Pressure sensor

In short, a pressure sensor converts pressure into a small electrical signal, which is sent and displayed. Therefore, these are also commonly referred to as pressure transmitters. Two common signals used are 4 to 20 mA signals and 0 to 5 volt signals.
Most pressure sensors work using the piezoelectric effect. This is when the material generates a charge in response to stress. This stress is usually compressive, but may be twisted, bent, or vibrated.

Pressure sensors detect pressure and can determine the amount of pressure by measuring the charge.

The pressure sensor needs to be calibrated in order to know what voltage or milliamp (mA) signal corresponds to what pressure. This is the basic “zero” and “span” calibration or minimum and maximum, which is a common job for maintenance personnel.

What common types of pressure can you measure with a pressure sensor?

We use three common types in the industry.

The first is “gauge pressure”. Measured with reference to atmospheric pressure (typically 14.7 PSI). When above atmospheric pressure, you will display a “positive” pressure; when below atmospheric pressure, you will display a “negative” pressure.
The next is “absolute pressure“. In short, this is the pressure relative to an absolute vacuum measurement. The absolute pressure of the full vacuum is zero PSIa and it increases from there. This type of sensor can be used if it is necessary to read pressures below atmospheric pressure.
The last type that is usually monitored in the industry is “pressure differential”. It sounds like this, the difference between two pressures, a measured pressure and a reference pressure.

Sino-Inst also provides repair services for pressure sensors. Such as WIKA, Rosemount, and other brands of pressure sensors.

Pressure sensor structure

Pressure sensor wiring

Industrial Applications of Pressure Sensors

Pressure sensors play critical process and quality control roles in industrial applications. Industrial pressure sensors provide a reliable solution for medical, HVAC, and industrial applications. Our sensors are signal-conditioned, calibrated over the entire temperature range. And include digital or analog outputs.

Industrial pressure sensors can be used to measure media, namely different types of gases and liquids:

Air
Atmosphere / barometric pressure
Gas
Water
liquid
Hydraulic / pneumatic
Corrosive media

Although many of the above apply to corrosive substances. You can also find sensors specifically designed for measuring corrosive media.

Sensors used in chemical processes may need to withstand exposure to corrosive media such as acids or bases. Many stainless steel enclosures and / or diaphragms can be specified to improve corrosion resistance. They can also withstand corrosion due to atmospheric humidity or water splashes. Or withstand permanent immersion in untreated water or chemical-containing water such as treatment plants or swimming pools.

The corrosion hazard caused by seawater, salt spray or coastal environment exceeds the tolerance of ordinary low grade stainless steel. Housing and diaphragm materials such as super nickel alloys or titanium are generally recommended.

Sensors can also be specified, such as using O-rings made of fluororubber instead of parts made of rubber to increase resistance to aging and corrosion. Alternatively, the diaphragm can be welded to the sensor body to enhance corrosion resistance.

How Does a Pressure Transmitter Work?

Pressure Transmitter Calibration

Sino-Instrument offers over 20 Pressure sensors. A wide variety of Pressure sensors options are available to you. Such as free samples, paid samples. Sino-Instrument is a globally recognized manufacturer of Pressure sensors, located in China. Sino-Instrument sells through a mature distribution network that reaches all 30 countries worldwide. Pressure sensors products are most popular in Europe, Southeast Asia, and Mid East. You can ensure product safety by selecting from certified suppliers. With ISO9001, ISO14001 certification.

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KimGuo11

drurylandetheatre.com

SI-ML Portable Ultrasonic Liquid Level Indicator

Posted on March 2, 2020 by KimGuo11

Portable Ultrasonic Liquid Level Indicator allows you to conveniently detect the level of liquid available in a container /cylinder/pipe/tank. Ultrasonic principle, Non-contact.

Portable ultrasonic liquid level indicator is best choice for tanks or pipes level measurement. It is designed to measure the presence or absence of liquid at a certain height position in a tank or in pipelines. Non-contact ultrasonic detection technology. SI-ML works perfect for detection of dangerous toxic or corrosive liquids. Under ordinary conditions, the maximum wall thickness of measurable containers is 30mm. The product is suitable for the detection of various types of liquids. Liquids are non-crystalline or other particulate matter. For example CO2 Tank. Thanks to non-contact detection technology, this level indicator is ideal for detecting hazardous toxic or corrosive liquids.

Please feel free to contact us for Techinical Support, or Request a quote for Portable ultrasonic liquid level indicators (customization available).

Features of Portable Ultrasonic Liquid Level Indicator

SI-ML Portable Ultrasonic Liquid Level Indicator is mainly used for liquid level detection of various tanks and pipes.

Detect the storage capacity of fire extinguishing agent storage containers in gas fire extinguishing systems (eg, original Indo-European, haloalkane, CO2, etc.). Measure the presence of liquid level in a cylinder or container at a certain height position, such as haloalkane, CO2, etc. It can also indicate the presence of a liquid level in the container.

The material of the measurable container can be various metals, glass or non-foam. And the measurable wall thickness is usually not less than 30mm. This measurement technique is not affected by factors such as medium density, dielectric constant, electrical conductivity, reflection coefficient, pressure, temperature, sediment, and so on.

The product can be used to detect all liquids that do not crystallize and contain no particulate matter. Because it uses non-contact detection, it is ideal for fire detection of toxic and corrosive hazardous liquids and acceptance testing of gas fire suppression systems.

No contact with medium
Suitable for toxic, corrosive, orinvasive medium
No need for drilling or welding on tank wall
Advanced ultrasonic sensor technology
Reliable measurement results
Easy and convenientt ooperate and maintain
Ultrasonic adaptive detection algorithm.
High-contrast OLED color display, suitable for outdoor use under strong light.
Newly added ultrasonic waveform display function facilitates parameter testing, waveform comparison and other functions to ensure measurement accuracy in complex situations
Gooduser interface design
The comprehensive software displays the measurement results, and the method is simple

Working principle of Portable Ultrasonic Liquid Level Indicator

The portable ultrasonic cylinder liquid level indicator couples high-frequency ultrasonic pulses generated by the sensor to the outer wall of the container. An ultrasonic signal is then returned from the container wall. Different media attenuate the received ultrasonic signals differently. The received reflected wave generates an electrical signal. The magnitude of the electrical signal can be displayed by the digital value of the LCD on the panel, and the LED corresponding to the liquid level is lit.

Different sensors have different sensitive devices. When measuring, different containers and different liquids will produce slightly different readings, so this reading is not absolute. But the same thing is that when the sensors are connected to the respective inside and outside of the container, the reading of the level indicator will change significantly. In this way, you can determine whether there is liquid at a certain height position in the container by changing the indicator on the instrument and the value displayed on the LCD.

Extended reading: The Secret of Ultrasonic Level Measurement

How to use Ultrasonic Liquid Level Indicator?

Operation Guide for Ultrasonic Liquid Level Indicator:

Structure of Portable Ultrasonic Liquid Level Indicator

Applications of Portable Ultrasonic Liquid Level Indicator

Liquid level detection of dangerous chemicals in storage tank
Liquid level detection for CO2 storage tank of the fire fighting system in the off shore drilling platform
Liquid level detection in common tank

Note: Usable for calibration of liquid level meter

Extended reading: GWR Corrosive Liquid Chemical Level Sensor

Portable ultrasonic liquid level indicator for Co2

Co2 cylinder specifications (external diameter division):

The CO2 cylinders measured by this meter are divided into the following 4 specifications: 215mm-225mm diameter cylinders. 270mm-280mm diameter cylinders. 345mm-355mm diameter cylinders. 395mm-405mm diameter cylinders. There are no excessive requirements for the height of the medium and the tank.

If you need to purchase liquid level gauge for CO2 Cylinders, you may like:

CO2 Cylinder | Portable Liquid Level Gauge

Procurement Guide: Ultrasonic liquid level sensors

Co2 cylinder measurement operation:

Select “co2 cylinder”-“Choose a suitable cylinder diameter” through the menu and enter the measurement interface.
Hold the probe vertically and tightly on the tank, and press the <Measure> button to measure.
Measurement results are based on measurement parameters and level indicator lights (red is “no liquid”, green is “with liquid”)
Generally, the measurement is started from the bottom of the storage tank (measurement with liquid position). If the measurement parameter is> = 2, the current level is considered to be a liquid-free position. And <2 is considered to be a liquid level. if it is floating around 2, It is considered that the liquid level of the horizontal plane is approaching the liquid surface (usually about 5 cm).
Take multiple points on the same horizontal plane for measurement. And take the result with the highest probability as the final result (avoid the interference of welds and unknown factors).
Find the liquid level position step by step through the approximation measurement.

Co2 cylinder measurement Note:

Due to the irregular shape of the air outlet and the many welding kits on the top of the carbon dioxide cylinder, the bottom and top measurement results are invalid. (If the fuel tank is full, the top is usually empty).

FAQ

What is ultrasonic level measurement?

Ultrasonic liquid level measurement is non-contact liquid level measurement. Commonly used for non-contact liquid level measurement. Such as tank level, river level, etc.
Based on the principle of ultrasonic time difference, the ultrasonic liquid level sensor is used to complete the ultrasonic liquid level measurement.
Read more: Guide: Non-contact Ultrasonic Level Sensing transmitters

How does an ultrasonic level transmitter work?

To put it simply, the ultrasonic wave sent by the ultrasonic sensor hits the bottom of the tank or the liquid surface vertically. The sensor then receives the reflected return signal. The time difference between one trip and one trip back and forth. Through intelligent calculation inside the instrument. The calculation formula is as follows: h = H-v * t / 2. Where: h is the required liquid level height. H is the distance between the ultrasonic probe and the bottom of the container. v is the speed of ultrasonic sound. t is the ultrasonic propagation time. It can be seen that the measurement accuracy of liquid level depends on the measurement accuracy of ultrasonic sound velocity v and ultrasonic propagation time t.
Extended reading: Guide to Ultrasonic Level Transmitters

How does water level sensor work?

The water level sensor is an essential component. If not repaired or replaced, a sensor can become damaged over time and fail entirely. Too much water can cause a malfunction and too little water means inadequate water pressure. Either way, repairing or replacing holding tanks is an expensive task you shouldn’t have to undertake because of sub-par sensors.
With Sino-Inst’s water tank level sensors, there’s nothing to break down or rust and our models have a 99% success rate!
In case you encounter any problems with the product, please call us and we will immediately replace or repair it for you for free.
Read more about our water tank level sensors and control systems.

How does a level transmitter work?

There are 7 main types of level transmitters that Sino-Inst offers. Each type of transmitter works in a different way, and makes it useful for different types of processes.
Capacitance Level Transmitters
Hydrostatic Level Transmitters
Magnetic Level Transmitters
Radar Fill Level Transmitters
Ultrasonic Level Transmitter
Guided Microwave Level Transmitters
Magnetostrictive Liquid Level Transmitters

Other Non-Contact Level Measurement

**ULT-100A Ultrasonic Level Transducer**

**ULT-200A Ultrasonic fuel tank level sensor**

**HS-2000 Ultrasonic Tank Level Sensor-External Mounted**

**HS-ULC Ultrasonic Level Switch-External Mounted**

**HS-ULC-Pro Ultrasonic Non-contact Liquid Level Controller**

More about: Ultrasonic Level Sensor Applications

Sino-Inst offers Ultrasonic Liquid Level Indicators for tank level indicate. Portable co2 bottle liquid level gauge uses ultrasonic non-contact measurement technology. Detect and display the presence or absence of the Co2 cylinder liquid level.

The Digital portable Ultrasonic Liquid Level Indicators are designed to offer a simple, accurate, rapid and reliable method. Determining the liquid level of high or low pressure CO2, Halon, FM200, Propane, Novec 1230 and any liquefied gas under pressure. No need to move or weigh the cylinders.

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KimGuo11

drurylandetheatre.com

Amazing Solutions for Continuous Liquid Level Measurement

Posted on February 25, 2020 by KimGuo11

Looking for a specific type or a custom continuous liquid level sensor? Sino-Inst offers High quality Liquid level sensors for continuous level measurement.

Level sensors are used in process control in many industries and they fall into two categories. Continuous level measurement sensors and Point level measurement sensors.

The point level measurement sensor is used to indicate a single discrete level, that is, to indicate a preset level. The function of this type of sensor is the upper limit alarm, which indicates the overfill condition, or the lower limit alarm condition.

Continuous level sensors are more complex, allowing level monitoring of the entire system. They measure the level of the liquid level in a range, not the level of a point. Continuous level sensors produce an analog output that is directly related to the liquid level in the container. To build a level measurement system, this output signal is transmitted to the process control loop and visual indicators.

Sino-Inst offers a variety of Level senors for Continuous level measurement. If you have any questions, please contact our sales engineers.

Featured Continuous Level Sensors

**SI-LT Magnetostrictive level transmitter with Local Digital Display**

**SI-100 Magnetostrictive Level Sensor**

**SI-U02 Multi-Point Liquid Level Float Switch**

**SMT3151TR Submersible Level Transmitter–2Mpa,200m**

**SIRD90 Radar Level Transmitters, Non-Contact**

**SIRD70 Guided Wave Radar (GWR) Level Transmitters**

What is a Continuous Liquid Level Sensor?

Continuous level sensor definition

Continuous level sensors are transmitters that measure liquids within a specified range. Level sensors determine the exact amount of liquid that provides a continuous analog signal. The level signal can be displayed directly on site or integrated into a process control or management system. These products can be installed vertically and horizontally. They are ideal for monitoring liquids in confined or restricted areas.

Wikipedia: Level sensor

Difference between a point level sensor and a continuous level sensor?

Point level sensor

A sensor designed for point detection will detect liquid at a certain point in the tank or chamber. Generally, this applies to processes that require high-level or low-level management.

In most cases, they act as switches when the tank level rises or falls to a certain level. This could be an alarm or a bonding device. Essentially, the sensor detects when the liquid has reached the desired point, and it acts as a switch to activate the necessary response.

Continuous level sensor

The continuous level sensor is designed to detect the level through every point in the tank or chamber. This means that it provides feedback regardless of the level and the entire container range. This is great for processes where level is always important, and for applications that require increased accuracy.

Extended Reading: How to Measure Volume of Liquid

A point level sensor is a device that can detect the presence or absence of almost any liquid medium. Typically, these sensors are used in processes that need to detect high or low levels.

Generally, common applications requiring point sensors fall into two categories:
Leak detection – to prevent costly damage or service interruption to equipment or level measurement – to prevent spillage or dry conditions.

The technology works like a switch. When the level of a tank or container reaches or falls below a certain threshold. It drives an action.

A wide range of point level sensors are available for many applications and materials.

The float level sensor is a common point level sensor.
The float level switch consists of a fixed rod and a float.
The float has a built-in permanent magnet, which moves freely along the fixed rod with the rise and fall of the liquid level. The magnetic field of the permanent magnet acts on the reed switch, and the closer it is to the reed switch, the stronger the force. When the threshold is reached, the reed switch is closed.
The float level sensor has a robust structure and a measurement deviation of less than 1%.

For point level detection applications requiring no moving parts. Optical liquid level sensors are a good option.
Optical liquid level sensors are suitable for high, medium and low liquid level detection. and fits almost any installation. It has no moving parts, emits infrared light through LEDs, and calculates liquid level changes based on the amount of reflected light.
Optical level sensors are available in custom high temperature models and in different sizes to meet the needs of different applications.

Capacitive level sensors are suitable for reflective, viscous or viscous fluids. According to their principle, capacitive sensors enable non-invasive measurements. Internal level changes can be measured without drilling holes in the vessel under test.

Ultrasonic liquid level sensors work by emitting and measuring reflected high-frequency sound waves, which can withstand high pressure, high temperature and vibration. It is suitable for measuring liquids without foam and air bubbles. Ideal for applications in agriculture, mining, construction, printing, and specialty vehicles.

Extended reading: How does a Radar Corrosive Liquid Chemical Level Sensor work?

Continuous level sensor 4-20 ma

Sino-Inst provides signal output for all continuous level sensors. Analog signal output, 4-20mA output, 0-5V, RS485, HART optional.

Advantages of current signal (4 ~ 20mA signal)

The current signal is suitable for long-distance transmission. Because the current signal is not affected by the resistance of the wire. And the voltage signal will be divided when the wire itself has resistance, resulting in inaccurate measurement. Generally, the maximum transmission distance of 4 ~ 20mA is controlled within 100m, and it is recommended to use digital signals (485 communication)
The current signal generally uses a two-wire system, and the voltage signal generally uses a three-wire system. In contrast, the two-wire system saves materials and reduces costs than the three-wire system.
Compared with the on-site working conditions, the anti-interference ability of the current signal is stronger than the voltage signal. In the case of interference, it is recommended that the user select a 4 ~ 20mA signal.
The current signal can appropriately exceed the range of the range and output inaccurate signals. For example, a pressure transmitter with a range of 1MPa and an output of 4-20mA can output 24mA when it exceeds the range. The voltage signal is slightly different depending on the power supply. For example, a pressure transmitter with a range of 1 MPa and an output of 0 to 10 V cannot output signals above 9 V when the power supply is 9 V.
When the wire materials are not the same (such as copper, nickel), a magnetic field will generally be generated. And the voltage signal will have an error, and the current signal will not be required in the case of higher accuracy requirements.

Continuous Level Sensor can also be used with paperless recorder.

Measuring techniques for continuous level measurement

1. Ultrasonic Level Sensors

Ultrasonic Level Transmitters provide non-contact and maintenance-free level measurement, (Like the Radar ) for fluids, pastes, sludges and powdery to coarse bulk materials.

Ultrasonic level measurement, easy installation, wireless, portable and can be explosion-proof.Sonic is the sound we can hear. Ultrasonic is the sound above the human hearing range.

A human can hear maximum up to a frequency of 20 KHz. Ultrasonic frequencies are above 20 KHz. Ultrasonic waves are used to measure the level of liquids and solid objects in industries.

Ultrasonic level measurement is the contactless principle and most suitable for level measurements of hot, corrosive and boiling liquids.

The normal frequency range used for ultrasonic level measurements is within a range of 40-200 KHz.

Extended reading: Ultrasonic liquid level sensors

2. Hydrostatic (Pressure) Level Transmitters

Hydrostatic level transmitters, also called submersible level transmitter, or pressure level transmitters. For Hydrostatic level measurement, Continuous level measurement in liquid applications with pressure sensors. These transmitters help in determining fluid level of a container. By measuring the pressure of resting body of the fluid within it.

3. Continuous Level Radar Sensors

Radar level transmitter, also called Radar level gauge. Non-contact Continuous level measurement in liquids and solids with free space radar sensors.

Non-contacting radar, based on microwave technology, detects only surfaces that reflect energy. These transmitters work on the principle of radar by using radio wave emissions. Mounted at the top of a tank filled with a liquid.

The transmitter sends a radar signal into the liquid and receives a reflection of the signal. The transmitters then analyze the current fill level of the tank based on the time taken by the transmitted signal to return.

Extended reading: Radar Liquid Level Sensor|Corrosive, steam, volatile liquids

4. Guided Wave Radar Level Sensors

Guided Wave Radar (GWR) Level Transmitters, also called wave guided radar level transmitter. Using guided wave radar technology, GWR level transmittershave no moving parts. They can measure both level and the interface between two media.

Continuous level measurement in liquids and solids with guided wave radar sensors. These transmitters work by sending a microwave pulse through a sensor cable or rod. The signal hits the surface of the liquid, and travels back to the sensor, and then to the transmitter housing.

Based on the time taken by the signal to travel down the sensor and back up again. The electronics integrated in the transmitter housing determine the filling level.

Extended Reading: Silo/Bin material level measurement system

5. Capacitance level detectors

Capacitance level detectors, also known as Capacitance level transmitter. RF Capacitance Level Transmitter offers continuous and point level detection. In liquids and solids with capacitance probes.

These transmitters use liquid stored in a tank or container as a dielectric medium between two or more electrodes. The energy capacity of the capacitor circuit increases when there is more liquid, and decreases if there is less liquid. Measuring the variations in the capacitance value, capacitance level transmitters calculate level of the tank.

Read more about: Capacitive Level Measurement Principle.

6. Magnetostrictive level transmitter

Magnetostrictive level transmitter, in-tank liquid level transmitter, is a continuous magnetic level gauge. The magnetostrictive level sensor, measure the level of fluid in the vessel.

By detecting the level of the magnets contained within the float and then transmits the measurement back to the control system.

7. Magnetic Float level sensors

Magnetic Float level sensors are continuous level sensors featuring a magnetic float that rises and falls as liquid levels change.

The movement of the float creates a magnetic field that actuates a hermetically sealed reed switch located in the stem of the level sensor, triggering the switch to open or close.

Comparative analysis – 7 Tank Level Measurement Sensors

Magnetostrictive Level Sensor in Storage Tank Level Measurement

Applications

Continuous level sensors are versatile in monitoring liquid level needs. They can monitor water, diesel, lube oils and fuels, as well as various chemical and petrochemical liquids. And compatible with corrosive and non-corrosive substances.

Continuous level sensors are and used by industries including:

Food and Beverage
HVAC
Medical
Printing
Off-Highway Vehicles
Semiconductor
Oil and Gas
Agriculture
Wastewater Treatment
Concrete/Aggregate
Plastic/Vinyl
Marine
Chemical

Extended reading: Sludge Blanket Level Detector Appliactions

The Silo/Bin level measurement and control system solves the problem of frequent dumping accidents in the powder silo of the mixing station during the feeding process. It avoids the problems of dust flying, waste of cement, and environmental pollution. It reduces the equipment damage caused by the collapse of the dust removal hood of the mixing station Other issues and prevents the safety issues of the workers present.

Extended Reading: Silo/Bin material level measurement system

Generally, we can use radar level sensors, ultrasonic, or guided wave radar to measure.

**SI-FMF15 FMCW Radar High Temperature Level Sensor**

**SI-FMF21 FMCW Radar Silo Level Sensor**

**Alternative to VEGAPULS 64-80GHz FMCW Level Radar**

**SIRD-701 Guided Wave Radar Level Sensor**

**SIRD-702 GWR Corrosive Liquid Chemical Level Senso**

Tank level senor is a level sensor used to measure the tank level. The liquid level is the level of the liquid in a sealed container (such as a water tank) or an open container (water tank). The instrument that measures the liquid level is called a liquid level sensor, a liquid level gauge or a liquid level transmitter. The liquid level sensor is a kind of level instrument. Hydrostatic, Ultrasonic, Magnetostrictive, Radar, Differential Pressure are commonly choices for tank level measurement. Liquid level sensors have been around for decades for leak detection or level measurement. Common measured medium are: Water, Fuel, Diesel, Gasoline, diesel, liquefied gas, liquid ammonia, etc.

Read more about: Level Senors for Tank Level Measurement

To measure the powder level, most of the radar level gauges and ultrasonics are used. Or heavy hammer level gauge.

High-frequency radar level gauge application: powdery solids, or environments with a lot of dust
① coal bunker, cement bunker, clinker bunker,
② Flour, corn flour, rice flour, sorghum flour, etc.
③Iron powder, aluminum powder, etc.

Ultrasonic level meter (ultrasonic level sensor) is used to measure the level of solid materials such as coal, ore, corn, wheat, glass, straw, garbage, wooden boards, automobiles, plastic particles, etc. It is used in metallurgy, mining, grain processing, storage, security and other industries.

Extended reading: Non Contact Liquid Level Sensor Working Principle

A laser level transmitter is also called a laser level meter. Industrial Accurate, non-contact, and uninterrupted real-time monitoring of material height. Designed for material level and liquid level. A laser level transmitter is a continuous or high-speed pulsed laser beam emitted by a semiconductor laser.

The laser beam meets the surface of the object to be measured and reflects. The light return is received by the laser receiver. And accurately record the time difference between laser emission and reception. In order to determine the distance from the laser radar to the measured object. Laser level transmitter is similar to radar/ultrasonic level sensor.

Read more about: Laser Level Transmitter

There are many types of liquid level sensors that can measure water. From our personal experience, hydrostatic submersible level sensors are the easiest to use and relatively low cost.

Extended reading: Hydrostatic Level Measurement

But,

Sometimes, due to the limitation of measurement conditions, it is necessary to select the external water tank level indicator.
Our Sino-inst external water tank level indicator is based on ultrasonic principle.
When measuring with External Tank Level Indicator, install the ultrasonic probe just below the outer wall (bottom) of the container under test. No need to cut holes, easy to install. Does not affect on-site production. It can realize accurate measurement of various toxic substances and various pure liquids in high temperature and high pressure airtight containers.

Read more about: External Tank Level Indicator

How to select a continuous level sensor?

Selection of level measurement sensor.

Issues to consider before selecting a level measurement sensor include:

Measure liquid or solid?
What is the temperature and pressure range of the application environment?
Need point level measurement or continuous measurement?
What is the level measurement range required?
Is the measured material conductive?
Will the measured material cover or accumulate on the surface?
Will there be turbulence, foam or steam on the liquid surface?
Do you need contact or non-contact level measurement?
What kind of output is required, analog, relay, digital display or other?

Extended Reading: Laser level transmitter working principle

Frequently
Asked
Questions

Help Center

In continuous level measurement, the level of a medium in a tank or silo is detected with the help of different measuring methods and converted into an electronic signal.

Continuous level sensors are more complex, allowing level monitoring of the entire system. They measure the level of the liquid level in a range, not the level of a point, and therefore produce an analog output that is directly related to the liquid level in the container. To build a level measurement system, this output signal is transmitted to the process control loop and visual indicators.

There are 7 main types of level transmitters that Sino-Instrument offers. Each type of transmitter works in a different way, and makes it useful for different types of processes.

Level Transmitters

The point level measurement sensor is used to indicate a single discrete level, that is, to indicate a preset level. Normally, the function of this type of sensor is the upper limit alarm, which indicates the overfill condition, or the lower limit alarm condition.

What are the common types of oil level sensors?

Magnetic float sensor: Developed according to the principle of buoyancy and magnetic coupling, with good visibility of characteristics and direct reading of values;
Pressure sensor: Use liquid pressure to measure liquid depth, suitable for measuring water depth in river channels;
Capacitive sensor: Utilize the principle that the capacitance formed between the probe and the container changes linearly with the liquid (material) level. There is no moving or elastic component. Impact resistance, easy installation, high accuracy, high reliability;
Magnetostrictive sensor: The principle of the sensor is to generate a longitudinal magnetic field through a permanent magnet and another magnetic field through an electric current. When the two magnetic fields intersect the waveguide, the waveguide generates a “magnetostrictive” phenomenon, and a strain pulse is generated instantly. Features It is fast and accurate. It is mostly used for liquid measurement in tank trucks;
Float sensor (reed switch): It is more common. Nowadays, the automatic oil level sensors of automobiles belong to this category. The working principle is to use the buoyancy of liquid on magnetic floating ball, and the dry spring of floating ball level gauge is magnetically attracted to change the liquid level position into an electrical signal. The reed switch is connected in sections, and the length of each section is the test accuracy of the level gauge.

The working principle of the oil level sensor device is through the continuous acquisition of the relative percentage signal of the oil level sensor. With the calibration algorithm, it is converted into the corresponding volume information. The fuel quantity of the fuel tank is monitored. Combined with the GPS system, the vehicle is known Driving status.

Point-level switches are used as high-level and spill-prevention alarms, low-level and pump-protection alarms, and to turn pumps on and off. Continuous level (proportional) measurement, on the other hand, indicates the level in a vessel over the full span of measurement.

Point level measurement is different from Continuous Level Measurement. Used to detect material levels in tanks or silos.

There are high levels (with material) and low levels (without material).

High level measurement allows containers to be filled to full capacity while preventing overflow situations.

Low level measurement alerts facilities to the need for replenishment, preventing process and/or plant downtime.

Technical Support

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Sino-Inst offers over 40 Continuous Level Measurement Sensors. About 50% of these are liquid level meters, 40% is the tank level sensor.
A wide variety of Continuous Level Measurement Sensors options are available to you, such as free samples, paid samples.
Sino-Inst is a globally recognized supplier and manufacturer of Continuous Level Measurement Sensors instrumentation, located in China.

Request a Quote

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KimGuo11

drurylandetheatre.com

SI-U05 Cable Float Level Sensor & Swtich

Posted on February 21, 2020 by KimGuo11

Cable Float Level Sensor (Float level switch) for water/level switch control.

Cable Float Level Sensor (Float level switch) is a high performance level control switch. It can control the work of the liquid pump, adjusting the liquid level. And it can also be installed in the submersible pump to control and protect the motor. High sealing performance is guaranteed by polypropylene injection. It is a switch that can adjust the liquid level in a bucket, tank or well. Cable Float Level Sensor is self-adjusting, easy to operate, easy to install and maintenance-free. It has a resistance to sewage. It is used in mines, oil, irrigation containers, etc.

Please feel free to contact us for Techinical Support, or Request a quote for float level sensors (customization available).

More Float Level Sensors

The Cable Float Level Switch is designed using the principles of gravity and buoyancy. Cable Float Level Sensor has a simple and reasonable structure. Including: A floating body. A large-capacity miniature switch set in the floating body.

A driving mechanism capable of turning the switch on and off. And a three-core cable connected to the switch. The outstanding feature of this product is its stable and reliable performance. Cable Float Level Sensor has no malfunction caused by the fluctuation of the liquid surface.

At the same time, it has the characteristics of convenient installation, low price and long service life. This product can be used with various liquid pumps, and automatic control of water levels in water supply, drainage and rotten liquids.

Features of SI-U05 Cable Float Level Sensor

Cable Float Level Sensor can be matched with various liquid pumps. And is widely used for automatic control of water levels in water supply, drainage and corrosive liquids.

Simple construction.
Reliable performance. The product can send switch control signals under normal conditions. Strong reliability.
Durable and long life.
Easy installation method. Convenient adjustment method. Adjustable water level control range.
Simple circuit. Economical and practical operating voltage 220v. Current 10A. Simple circuit and low cost.
Resistant to corrosion.

Specifications of SI-U05 Cable Float Level Sensor

Float Materia:	PP, SUS304
Contact Capacitance:	10A/250VAC(PP),2A/250VAC(SUS304)
Contact type:	1A,1B or 1AB(PP),SPDT(SUS304)
Cable specification:	Rubber cable and PVC(PP),Silicone:0.75mm²×3C(SUS304)
Suitable temperature:	Rubber cable: -10℃~80℃,PVC cable:0℃~60℃,Silicone: 0~170℃
Gravity:	>0.6g/cm³(PP),>0.5g/cm³(SUS304)
Lead length:	2m 3m 4m 5m 10m, etc. Other lengths can be customized
Applicable medium:	Clean water, sewage, oils and acid-base liquids below medium concentration

Applicaitons of Cable Float Level Sensor & Swtich

Water level monitoring
Tank level control
High or low level alarm
Municipal water control
Industrial water control
Filling or draining reservoirs and tanks
Pump automation
General pump control
Pump control in wastewater
Suitable for low specific gravity materials
Can handle high operating temperatures
Clean fluids with small process connections
Water and wastewater
Petrochemical
Chemical

Extended reading: Ultrasonic Level Switch-External Mounted

Working Principle of Float Level Sensor

The Cable Float Level Switch is with simple structure of using micro switch or proximity switch or reed switch to control the contact. And it is user friendly design for level measurement. The switches will send out ON or OFF contact signal output. The floating angle is larger than a certain degree. Then the state of the iron ball and reed switch will be changed for actuation. For wastewater and applications at different temperatures, the material of the float can be selected from plastic to stainless steel. Cable float level switch controls long distance and multi-point contact detection. Cable float level switch can be used for transparent liquid and granular liquid industries.

Float Level Sensor Installation

Pass the wire of the float switch from the concave circle of the center of the weight. Push the weight gently to make the plastic ring embedded above the round hole fall off due to the thrust of the wire head. You can also use a screwdriver to remove this plastic ring. Then put the dropped plastic ring on the cable to set the water level by the weight you want.
Gently push the weight to pull out the cable until the center of the weight holds the plastic ring. As long as the heavy hammer is lightly buckled in the plastic ring, it will not slip. If the plastic ring is damaged or lost, it can be replaced with a light bare copper wire into the cable.
Please pull the cable directly to the control box. Avoid using the intermediate connector as much as possible. If there is a connector as a last resort, never immerse the cable connector in the water.

Image source: https://instrumentationtools.com/cable-float-level-switch-working-principle/

Other types of Float Level Switches

**SI-U03 Float Switch Water Level Controller**

**SI-U04 Magnetic Float Level Sensor-Reed Switch**

Liquid level float switch is a commonly used liquid level controller. For water Tank & Pump alarm and level control. Can be divided into Continuous Float Level Sensor and Point Level Float Switch. Read more about Guide for Liquid level float switches.

Q&A

What is float level switch?
How do you adjust a float switch?
What is liquid level sensor?
How many types of level switches are there?

The float level switch is based on the principle of buoyancy. The float ball moves a distance with the liquid surface, and this movement plays a limit role. A magnetic floating ball is used to generate a switching action with a reed switch, output a switching signal, and then control the liquid level through wiring.

The float level switch only needs to re-calibrate the water level line before we install it. The switch itself cannot be adjusted. At this time, use a multimeter to measure the switch state, and it will be turned on and off with the water level near the waterline, which means that there is no problem. Just make sure that the water level line of the thermal equipment is consistent during the installation. For example, the liquid level switch of SOR is generally attached to the water level line on the wall of the cylinder. We soak the switch in the water tank and slowly sink, so that the water surface gradually approaches the marking line. When it is closest, we will hear the micro switch action the sound of.
It should be noted that the working temperature of the high-level liquid level switch is high, and the water temperature inside is also high; the density of high-temperature water is less than that of room temperature water. Therefore, the action line of room temperature water is lower than the switch identification line.
Low level alarm is connected to normally closed (NC), high level is connected to normally open (NO). This type of switch is not difficult to install. The liquid level switch itself will have more than two pairs of micro-switches, which respectively output two pairs of normally open and two pairs of normally closed contacts, which are usually “on alarm” when applied.

The liquid level sensor converts the liquid level signal in the container into a switching signal or a voltage and current signal, and then through an external circuit, allows the surveyor to accurately know the liquid level in the container.
There are 7 main types of level transmitters that Sino-Instrument offers. Each type of transmitter works in a different way, and makes it useful for different types of processes.

Level Transmitters

Liquid level switch, also known as water level switch, liquid level sensor. The liquid level switch is a switch used to control the liquid level. It is mainly divided into contact type and non-contact type. Capacitive liquid level switches are commonly used in non-contact switches. And contact float type liquid level switches are most widely used. Electrode level switches, electronic level switches, and capacitive level switches can also be implemented using contact methods.

There are currently 6 medium level switches:

Float level switch: The magnetic float of the float level switch rises or falls with the liquid level. So that the sensor detects the position of the reed switch chip in the tube, and sends a contact on / off switch signal. Because of its simple structure and economic benefits, it is widely used in the market, mainly for civilian use. But its stability is relatively poor compared to industrial-grade products.
Capacitive liquid level switch: After the probe is wetted, it detects the change in capacitance value and outputs a contact signal, which has certain advantages in the measurement of slightly viscous media.
Electrode type liquid level switch: The electrode type liquid level switch uses the conductivity of the liquid to detect the level of the liquid. Once the measured medium touches the pole, it will conduct electricity and detect the signal. After the signal of the controller is amplified, a contact signal is output to realize the control of the liquid level.
The photoelectric liquid level switch: The photoelectric liquid level switch uses infrared detection, using the principle of refraction and reflection of light. The reflection or refraction of light at the interface between two different media. When the measured liquid is at a high level, the measured liquid forms a kind of interface with the photoelectric switch. When the measured liquid is at a low position, air and the photoelectric switch form another interface. These two interfaces make the intensity of the reflected light received by the light receiving crystal inside the photoelectric switch different. That is, correspond to two different switching states. Generally speaking, compared with other measuring instruments, the applicability of photoelectric switches is poor.
Tuning Fork Liquid Level Switch: It outputs a switch signal by detecting the change in the frequency and amplitude of the fork’s vibration, which is highly versatile. For the viscous working conditions, please consult with the manufacturer to determine the working conditions that are easy to crystallize.
Ultrasonic external liquid level switch: The instrument probe emits ultrasonic waves and detects its residual vibration signal in the container wall. When liquid passes through the probe, the amplitude of this aftershock signal becomes smaller. This change is detected by the meter and outputs a switching signal. It is a non-contact type and is often used in high-risk situations where it is difficult to open holes on the site, but the cost is relatively expensive.

Techinical Support

Quickly Set Level Monitoring System for Industrial Holding Tanks

How to check Level in Underground Tanks? What Tank Level Indicators to Choose?

Enhancing Marine Tank Monitoring with Advanced Marine Water Tank Level Sensors

Shopping the Right High Temperature Level Sensor: 80℃~1000℃

Cooling Tower Level Sensors for Water Level Monitoring and Water Level Control

Case: High Temperature Radar Level Transmitter for Melted Salt-Solar Photovoltaic Power Station

Sino-Inst is float level sensor manufacturer. On the premise of ensuring product quality, we offer you the best price.

Sino-Instrument offers over 10 level transmitters for level measurement.

About 50% of these are liquid level meters,

40% is the tank level sensor.

A wide variety of level meters options are available to you,

such as free samples, paid samples.

Sino-Instrument is a globally recognized supplier and manufacturer of level measurement instrumentation, located in China.

Request a Quote

KimGuo11

drurylandetheatre.com

SI-U04 Magnetic Float Level Sensor-Reed Switch

Posted on February 19, 2020 by KimGuo11

Magnetic Float Level Switches & Sensors with Magnetic Reed Switches for Continuous Level Measurement.

Magnetic Float Level Sensor works with Reed Switch, is a continuous level sensor. SI-U04 Magnetic Float Level Sensor-Reed operatess on a direct, simple principle. As the magnetic float rises and falls as liquid levels change. The magnetic field generated from the inside of the float drives the sealed reed switch installed in the stem. The stem is made of non-magnetic metal or strong engineering plastic. Magnetic Float Level Sensor gets the liquid level signal, transfers it into digital current signal and switching signal. Generally speaking, there are two structures of magnetic floats. Besides, the Magnetic Float Level Sensor supports multiple mounting methods. Such as top-mounted, side-mounted. So SI-U04 Magnetic Float Level Sensor can be applied to a variety of tank level measurements.

Please feel free to contact us for Technical Support, or Request a quote for float level sensors (customization available).

More Float Level Sensors

Features of Magnetic Float Level Sensor

Simple structure, stable and reliable, good repeatability;
Realize the connection measurement of the liquid level
Not affected by the physical and chemical state of the measured medium. Such as: the effects of conductivity, dielectric constant, foam, pressure, temperature, evaporation, boiling, and bubbles;
Use different materials, which can be used in various strong and weak corrosion, flammable and explosive, toxic, strong radioactive, and foul media environments;
Liquid level measurement or interface measurement of two different density media;
Explosion-proof structure design, suitable for use in explosive environments.
Two-wire 4-20mA current output, with 0.56 “LED digital display, convenient for long-distance observation at night.

Applications of Magnetic Float Level Sensor

Industries:

Marine (commercial ships)
Petrochemical
Food/beverage
Water/wastewater
Chemical and textile industry
Dyeing and finishing
Level control in shipping industry

Applications:

Liquid level measurement in hostile environments
For use in many toxic and corrosive chemicals
Tanks where up to three switch points are needed
Situations where vertical space is limited]
Boilers and Process Vessels
Control of industrial processes and dosing tanks

Any liquids including water, oil, and chemicals：

Diesel or Lube Oils
Vegetable Oils
Petroleum products
Water, Wastewater
Acids
Caustics
Fuels

Specifications of SI-U04 Magnetic Float Level Sensor-Reed Switch

Measuring range	200~6000mm(>6M customize)
Resolution factor	10mm,5mm,20mm
signal output	4~20mA(two-line)2000/m(1/2″,3/8″)
Loading resistance	500Ω
Transmitting	>1000m
Working power supply	16~30VDC
Density	≥0.5g/cm3
Pressure	PN2.5~PN160(×0.1MPa)(Max pressure PN320)
Operating temperature	-40 ~ 80 °C, ≤120 °C, ≤150 °C
Float ball diameter	Φ30~Φ120(depending on pressure and density)
Flange installation	DN40~DN150/RF/PL(HG/T20592~2009) customize2” thread(downward install)1/2” thread (upward install, resistance signal output) 3/8” thread(upward install, resistance signal output)
Installation angle	≤±25°
Electrical connection	M20×1.5 female thread three-lines screening cable
IP grade	IP65
Explosion-proof grade	Exia II CT6Ga,EXd IICT6Gb

Extended reading: Food grade flow meters for Food & Beverage industry

Operation Principle of Magnetic Float Level Sensor

Magnetic Float Level Sensor is composed of a reed switch, a precision resistor and a single-chip microcomputer circuit. When the magnetic force line of the magnetic float acts on a certain position of the liquid level gauge, the reed switch in that position is closed. The magnetic float follows the level change of the liquid level (interface). Linear 4 ~ 20 mADC signal output and relay contact output. Realize the detection, transmission and alarm control of the liquid (boundary) surface position signal.
The magnetic float level sensor uses imported high-quality sensing elements and signal conversion devices, which has excellent long-term stability and reliability.

Types of Magnetic Float

Magnetic floating ball (column type)
1.фmm (321, 316L stainless steel)
2.ф40mm (4 fluorine on stainless steel)
3.ф50mm (PVC, PP)
Note: The specification is the diameter of the floating ball, and the length depends on the density of the medium.

Magnetic floating ball (through the core)
ф76 × ф21 × 76
ф51 × ф15 × 51
ф28 × ф10 × 28
ф63 × ф25 × L (mm) is made of PVC and PP. L is determined by the density of the medium, and the diameter can be made according to user requirements.

Other types of Continuous magnetic float level switches

Q&A

What is a float level sensor?
What is a magnetic float switch?
How does a magnetic float switch work?
What is a liquid level switch?

Float level sensors are continuous level sensors featuring a magnetic float that rises and falls as liquid levels change. The movement of the float creates a magnetic field that actuates a hermetically sealed reed switch located in the stem of the level sensor, triggering the switch to open or close.
Float level sensor is composed of float, plunger and so on. The float level sensor is installed on the top of the container through the connection flange. The float floats on the liquid surface according to the principle of discharging the liquid volume phase and so on. When the liquid level of the container changes, the float also moves up and down. Due to the magnetic effect, the reed of the ball level sensor is magnetically attracted to change the position of the liquid level into an electrical signal. The actual position of the liquid is displayed digitally by a display instrument. The floating ball level gauge achieves long-range detection and control of the liquid level.

Learn more on Wikipedia

A magnetic float switch is a magnet fixed in a floating ball in the middle. Put the magnetic float on a stainless steel rod. Place a magnetic element (usually a reed switch) inside a rusty steel rod. When the levitation ball moves on a stainless steel rod, the magnetic elements will attract and break.

The purpose of a float switch is to open or close a circuit as the level of a liquid rises or falls. Most float switches are “normally closed,” meaning the two wires coming from the top of the switch complete a circuit when the float is at its low point, resting on its bottom clip or stop (for example, when a tank is dry).
Most float switches utilize a magnetic reed switch to open or close the circuit. The reed is encased in a glass tube, which is cemented into a plastic or stainless steel stem with epoxy. The illustration to the left demonstrates how a magnet can be used to open or close a circuit by moving it closer to or farther away from a reed switch. When the magnet comes close to the two contacts, they draw together and touch, allowing current to pass through. When the magnet is moved away, the contacts demagnetize and separate, breaking the circuit.
In a float switch, the magnetic reed switch is hermetically sealed in a stem, most often made from plastic or stainless steel. The float encases a sealed magnet, which moves up and down the length of the stem as a fluid level rises and falls.
As the magnet passes by the contacts in the encased reed switch, they draw together and complete a circuit between the two lead wires, as shown in the cutaway to the left.
The operation shown can usually be reversed by removing the bottom clip from the switch, inverting the float and replacing the clip. When this change is made, the switch circuit will be open when the float is resting on the bottom clip and closed when the float rises.
Properly used, float switches can deliver millions of on/off cycles, for years of dependable operation. Failures are normally due to overloading, frequently caused by spiking voltage.

Liquid level switch, also known as water level switch, liquid level sensor. Liquid level switch is used to control the liquid level switch. It is mainly divided into contact type and non-contact type. Capacitive liquid level switches are commonly used in non-contact switches, and contact float type liquid level switches are most widely used. Electrode level switches, electronic level switches, and capacitive level switches can also be implemented using contact methods.

Technical Support

**Level Senors for Tank Level Measurement**

Magnetic float level sensor manufacturer

The float level sensor is a fully customized product. Different measurement needs will cause price changes. So before determining the price of the float level sensor, we need to confirm:
1. Junction box style

Connection method
Probe diameter
Float distance
Probe length
Material selection

Sino-Instrument is float level sensor manufacturer. On the premise of ensuring product quality, we offer you the best price.

Sino-Instrument offers over 10 level transmitters for level measurement.

About 50% of these are liquid level meters, 40% is the tank level sensor.

A wide variety of level meters options are available to you,

such as free samples, paid samples.

Sino-Instrument is a globally recognized supplier and manufacturer of level measurement instrumentation, located in China.

Request a Quote

Please enable JavaScript in your browser to submit the form

KimGuo11

drurylandetheatre.com

SI-U03 Float Switch Water Level Controller

Posted on February 14, 2020 by KimGuo11

Float Switch Water Level Controller for Continuous Liquid Level (interface) Measurement and Automatic Control. Explosion-proof and water proof.

SI-U03 Float Switch Water Level Controller

Float switches, also known as float level switches. Float Switch Water Level Controller is mechanical water level indicators that depend on moving parts to trigger a switch.

Float switch water level controller can be directly installed on various tank equipment (water tank). Float switch water level controller is especially suitable for hot heavy oil in oil refinery (temperature ≤500 ℃, pressure ≤4.0MPa). Viscous and dirty media, asphalt, grease and other oil products. As well as flammable, explosive, corrosive and other media’s Liquid level (interface) continuous measurement and automatic control.

Please feel free to contact us for Techinical Support, or Request a quote for float level sensors (customization available).

More Float Level Sensors

Float Switch Water Level Controller Features

It can be installed horizontally on the side wall of the barrel, or vertically on the top of the barrel;
The structure is simple and reasonable, the performance is stable and reliable, and the installation is convenient;
Both 220VAC and 24VDC circuits can be used;
The control part is completely isolated from the measured liquid medium, which can be applied to high temperature and high pressure environment;
A variety of materials (SUS304, SUS316, PP), a variety of connection methods can meet environmental needs;
Lightweight (compact type) and long working life.
Suitable for various tank installations.
Suitable for viscous dirty media;
Available in explosion proof and non-explosion proof

Specifications of SI-U03 Float Switch Water Level Controller

Type	SI-U03-A	SI-U03-B	SI-U03-C
Protection level	dIIBT4	dIIBT4	dIIBT4
Pressure	1.0 MPa	1.0 MPa	1.0 MPa
Tenperature(℃)	Normal：≤100℃ High Temperature：≤350℃
Net weight	1.5～2.0Kg
Switching difference(mm)	≤8	25～550	8～1000
Setting method	Not adjustable	Stepwise adjustable	Stepless adjustable
Installation form	Horizontal	Horizontal	Vertical
Power supply and contact capacity and life	AC：220V/1.5A、110V/2.5A DC：24V/2.5A、240V/0.5A Life：5×100^2

Know more about: Guide for Liquid level float switches

How to install float switch in water storage tank?

The flange of SI-U03 series electric float liquid level transmitter is installed on the side wall of the medium tank.
Before installation, it should be considered in combination with the structural characteristics of the transmitter. It is convenient to operate, observe and maintain to determine the installation position and direction. If the floating ball transmitter is installed on the left side of the flange, it is installed on the left side, otherwise it is installed on the right side.
Assume that the current state is the right installation. If you want to change to the left installation, use the HART Communicator to move or set the transmitter’s zero position and range.
And (PV range), follow the prompts on the HART communicator display to enter URV (upper range value). LRV (lower range value). And display USL (upper sensor limit)With LSL (Low Sensor Limit). Reset the lower range value corresponding to 4mA and the upper value corresponding to 20mA and send it. If other parameters are not changed, you can change to the left installation.
Floating ball and club installation: First, the floating ball and the club are tightened and welded. For the club installation operation of the new connection structure of SI-U03-A small-angle floating ball liquid level transmitter, the club is installed. Screw into the inner screw hole of the connecting rod at the end of the protective rod sleeve.
Pay attention to tighten the top wires on both sides of the connecting rod into the annular grooves on the club. And then tighten the lock nuts on the top wire. For SI-U03-B large-angle floating ball liquid level transmitter, screw the ball into the inner screw hole at the end of the swing arm. And then tighten the top wire and lock nut on it in the same way.
Note: “If the site conditions are poor, in order to prevent the floating ball, club, swing arm and other connecting parts from loosening. It is recommended to place the top wire and the lock nut on the joint and tighten the float and the club After welding directly to the coupling. “
The transmitter is directly installed on the flange of the side wall of the medium container under test through a flange. The requirements for the straight pipe section of the connection flange are as follows: SI-U03-A L ≤ 160mm;
The transmitter head is connected to the radiator through the connection plate. When installing, insert the spindle head into the coupling hole of the transmitter head, and the coupling should not be distorted. The meter head can be installed on the left or right side.
For correct installation, please refer to the indicator dial on the back of the transmitter case. If the transmitter is installed on the left, turn the end pointer behind the meter head to the “left 0” scale. If the transmitter is installed on the right side, turn the pointer on the back of the meter to the “right 0” scale line. And when the float is moved to the lowest measurement position, tighten the set screw of the coupling and the spindle.
Install the balance rod (mechanism) into the dental insert and square hole. Tighten the top wire to fix the balance rod. Loosen the shaft nut and adjust the dental insert to make the balance rod and the ball in the same plane. And put the axial head nut.
Tighten the position of the balance weight and adjust the balance weight to the optimal state to fix the balance weight. Note: “For liquids of different densities due to the different buoyancy forces experienced by the float, the balance can be adjusted. The position of the hammer on the balance bar to achieve the goal of normal measurement. “
In the process of adjusting the balance weight, when the feel is light, you can adjust the two M10 compression bolts of the waist-shaped compression sleeve inside the radiator to tighten the expansion force of the sealing gasket. Otherwise, you can adjust the waist-shaped compression sleeve when the feel is light Two M10 bolts loosen the expansion of the gasket until it does not leak!

How does a float switch water level controller work?

The float ball level switch structure is mainly designed and produced based on the principles of buoyancy and static magnetic fields. The position of the floating ball with a magnet (floating ball for short) in the measured medium is affected by buoyancy. The change of the liquid level causes the position of the magnetic float to change. The magnet in the float and the sensor (reed switch) function to generate a switching signal.

Similar to the principle of the float level sensor. But the float level sensor outputs a quasi-continuous electrical signal, while the float level switch outputs a discrete switching signal.

Water Tank Level Controller

Water level controller refers to the control of high and low water levels by mechanical or electronic methods. It can control solenoid valves, water pumps, etc., and become water level automatic controllers or water level alarms. To achieve semi-automation or full automation.

Commonly used water (liquid) level controllers include reed switch water level controllers, float magnetic switch liquid level controllers, electrode type water level controllers, pressure type water level controllers, etc.

Read more about: Types of water level controllers

Water Level Sensors for Water Tanks

Water level transducers are also called Water Level Sensors, or water level transmitters. Water level transducers are used to monitor water usage and quality. The water level signal is output through 4-20mA and other signals, which is convenient for people to monitor the water level.

There are many types of water level transducers. Common ones are input type, ultrasonic, radar and so on.

Sino-Inst offer a wide range of solutions with various pressure ranges, cable lengths and output options.

For remote monitoring and recording of water level data in groundwater pumping and sludge testing, stormwater flood analysis and runoff, and surface water irrigation canals, streams and river measurements.

Read more about: Types Of Water Level Sensors

Water Tank Level Control System

Water level control refers to the control of high and low water levels by mechanical or electronic methods. It can control solenoid valves, water pumps, etc. to become an automatic water level controller or water level alarm, thereby realizing semi-automation or full automation.

Water level control is generally used for high-level tank water supply and sump drainage. The device that converts the water level signal into an electrical signal to control the start and stop of the water pump is called a water (liquid) level controller. Commonly used water (liquid) level controllers include reed switch water level controllers, float magnetic switch liquid level controllers, electrode type water level controllers, pressure type water level controllers, etc.

Read more about: Water tank level sensor system

Generally, we can monitor the liquid level of the water tank remotely. You can choose wired or wireless remote monitoring.

Wired remote transmission, generally the output signal of the liquid level sensor. Such as 4-20mA, RS485 and so on. Through the signal line, the liquid level information can be displayed remotely.

Wireless remote transmission, generally a liquid level sensor through a wireless signal. The use of LORA debugging method and NB-IoT communication method can greatly increase the communication distance. It can be widely used in the field of short-distance Internet of Things wireless communication in various occasions. Real-time monitoring of on-site liquid level data, alarm processing, statistical analysis and other functions.

The appropriate remote water tank level sensor can be configured according to the actual needs of users.

Read more about: Wireless Level Sensor – LoRa

The principles of liquid level sensors may vary, and their applications vary widely. Electronic or mechanical, remote or on-site display, contact or non-contact, it’s dizzying.

In addition to the way of connecting the measured container to visually display the liquid level, the mechanical liquid level gauge is used. Another way to measure is to use the buoyancy of the liquid surface. So that the buoy or float can follow the change of the liquid level, which is converted into the display of the liquid level. These two methods are simple though. But very stable and reliable.

The biggest feature of the mechanical level gauge compared to its electronic level gauge is that the internal structure is very simple and the counting is intuitive. A variety of materials are available, which can achieve anti-corrosion and explosion-proof, and can adapt to various installation environments.

Magnetic flap level gauge, glass tube level gauge, glass plate level gauge, float level gauge, etc. These are the most widely used mechanical liquid level display instruments on the market. They are widely used in petroleum, metallurgy, chemical, paper and other industries.

What about electronic? Generally speaking, the ones that need power supply are basically electronic. Float, capacitive, radar, ultrasonic, remote magnetic flap including liquid level transmitter and so on.

It’s easy to tell them apart, whether it’s powered internally or externally, whether it’s 24V or 220V. In short, the electronic must be powered to work.

Unlike the mechanical type, the working principle of the electronic level gauge is varied. For example, the radar level gauge uses microwaves, the magnetostrictive level gauge uses current pulses, the static pressure type uses the pressure generated at the bottom of the measured medium, and the ultrasonic level gauge uses ultrasonic waves to measure the liquid level.

High precision, easy installation, and adaptability to various installation environments are the characteristics of electronic liquid level display instruments. Compared with the mechanical type, they have a higher level of technology, but at the same time, the price is much higher than the mechanical type.

External Tank Level Indicator refers to an externally mounted level sensor. It is used to install on the outside of the liquid storage tank to measure the liquid level of the tank. When measuring with External Tank Level Indicator, install the ultrasonic probe just below the outer wall (bottom) of the container under test. No need to cut holes, easy to install. Does not affect on-site production. It can realize accurate measurement of various toxic substances and various pure liquids in high temperature and high pressure airtight containers.

Frequently
Asked
Questions

Help Center

The Float water level sensor uses a float to track the rise and fall of the water level, and directly drives the record in a mechanical way. The use of the float water level sensor requires logging equipment (including the water inlet pipe), which is suitable for the low sandy river section with stable bank slope and little river bed erosion. The float water level sensor is widely used in China.

The price of the water level float switch is mainly determined by some parameters:
structure type;
Wetted material
Pressure Level;
Flange specifications
Explosion-proof type
temperature;
Measuring range;
Insertion length
Medium density
Other contents such as density, operating temperature, operating pressure, electrical interface, etc., must be specified in the specification so that we can use them as reference data when designing the output.

Water level float switch is generally used for high level water tank water supply and sewage tank drainage. The device that converts the water level signal into an electrical signal to control the start and stop of the pump is called a water (liquid) level controller. Common water (liquid) level controllers include:Reed switch water level controllers. Float magnetic switch liquid level controllers. Electrode type water level controllers. Pressure type water level controllers, etc.

Liquid level controller refers to the control of high and low liquid level by mechanical or electronic methods. It can control solenoid valves, water pumps, etc. to achieve semi-automatic or full automation. There are many methods, depending on the choice of different products different.

Extended reading: Capacitive water level sensor

Notes on installation and adjustment of float level switch:

Just make sure that the water level line of the thermal equipment is consistent during the installation. For example, the liquid level switch of SOR is usually attached to the water level line on the wall of the cylinder. We soak the switch in the water tank and slowly sink to make the water surface gradually approach the marking line. When you get closest, you will hear the micro switch the sound of.

Note that:
High-temperature liquid level switches, etc. have high operating temperatures and high water temperatures. The density of hot water is lower than the density of room temperature water, so the action line of room temperature water is lower than the switch marking line. Low level alarm is connected to normally closed (NC), high level is connected to normally open (NO). This type of switch is not difficult to install. The liquid level switch itself will have more than two pairs of micro-switches, which respectively output two pairs of normally open and two pairs of normally closed contacts, which are usually “on alarm” when applied.

Control the high and low water levels by mechanical or electronic methods. It can control solenoid valves, water pumps, etc. to become an automatic water level controller or a water level alarm, thereby realizing semi-automation or full automation.

Liquid level switch is a general term. There are many types of level switches. Such as ultrasonic liquid level switch, electrode liquid level switch, capacitive liquid level switch, etc. The float level switch is also one of them.

The float level switch is a controller used to control the detection and control of the water level.

The float level switch is a liquid level control part with a simple structure and convenient use. It has no complicated circuits and will not be disturbed. As long as the material is selected correctly, any liquid, pressure and temperature can be used.

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Sino-Inst offers over 10 Float Switch Water Level Controllers for level measurement. About 50% of these are liquid Float Switch Water Level Controllers, 40% is the tank level sensor.

A wide variety of Float Switch Water Level Controllers options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of level measurement instrumentation, located in China.

Request a Quote

KimGuo11

drurylandetheatre.com

SI-U02 Multi Level Float Switch

Posted on February 13, 2020 by KimGuo11

Multi level float switch is also called multi point level switch. Support 1-4 liquid level measurement switch point customization.

Multi level float switch is a custom multi point float level sensor & switch. These versatile level switches are available in many materials. Like: Stainless Steel, Brass & Buna, PVC, Polypropylene or PTFE and can be ordered with an integrated temperature sensor. Use these multi-level float switches with a tank level alarm or liquid level control relay for a turnkey solution. Explosion-proof available.

Call us now to talk with a sales engineer or fill out our easy to use request for quote form by following the steps below.

More Float Level Sensors

Features of SI-U02 Multi Level Float Switch

Can be used for multi-point control. The position of the control switch can be customized according to user needs.
No power is required to use the reed switch, and the life of the contact can reach 2 million times.
All the switch outlets are in the same junction box, and the external construction wiring cost is low.
Compared with other types of liquid level switches with multiple switch control points, the RF unit has the lowest unit price.
The protection level of the junction box is above IP-65.
It is made of PP and SUS316 metal, so regardless of acid and alkali liquid, solvent or various fuels, there are suitable products for use.
The magnetic reed switch is completely isolated from the wires and liquid. So it can be used safely on high temperature and high voltage equipment.
Connecting rod type float level switch set, suitable for high temperature and high pressure occasions.
60VA dry contact reed switch, can choose normally open or normally closed by floating ball installation position.
316 SS float, conduit and mounting interface, suitable for harsh environment.
American standard (NEMA 4X) polypropylene housing with rotatable base for electrical centering adjustment.
Customizable catheter length and switch set point size.

Specifications of SI-U02 Multi Level Float Switch

PP and PVDF materials are suitable for strong acid and alkali places; SUS304 / 316 metal materials are suitable for high temperature and high pressure tank
The most complete specifications of the junction box, including plastic, aluminum alloy, stainless steel explosion-proof type, protection level IP-65 or higher
Contact capacity 50W / 250VAC SPST or 40W / 250VAC SPDT
Connection flanges have JIS, DIN, ANSI specifications; teeth have NPT, PF, BSP and other specifications
Multi-point control, easy installation and cost saving
Length: 7.6Cm to 2.4m
Accuracy: ± 3mm
Repeatability: ± 1mm
Specific gravity: minimum 0.55
Installation position: vertical installation ± 30 degrees
Switch set point: 1-5 (factory setting)
Contact type: SPST reed
Contact capacity: 240VAC / VDC @ 60VA
Electric shock output: normally open
Working temperature: -40 degrees to 200 degrees
Ambient temperature: -40 degrees to 60 degrees
Installation height: 13.2Cm
Pressure: 13.8bar
Protection level: IP65
Housing material: PP.UL94VO
Terminal strip: 12 posts, socket
Electrical interface: 1/2 ”NPT
Installation interface: 2 “NPT
Grade: Universal
Certification: CE
Special specifications can be customized according to customer needs

Extended reading: Ultrasonic Level Switch-External Mounted

SI-U02 Multi Level Float Switch Types

In order to adapt to different measuring liquids, customers can choose different wetted materials.

Types	Wetted material	Operating temperature	Working pressure
Standard type	Stainless steel 1Cr18Ni9Ti, 304SS, 316L	-30 ~ 120 ℃	≤2.5MPa
Anticorrosive	Polypropylene PP	-30 ~ 80 ℃	≤0.4MPa
Corrosion-resistant	Teflon PTFE/PVC	-30 ~ 160 ℃	≤1.0MPa

How does a float level switch work ?

The Multi-Point Liquid Level Float Switch operates magnetically, without mechanical connections. And it is simple and reliable.

When the floating ball switch measures the floating medium of the test medium, the float moves the main body. And at the same time, the magnet on the other end of the float will control the magnet on the switch operating lever.

Set one or more reed switches in a closed metal or plastic tube. And then pass the tube through one or more, hollow and floating ring with ring magnet inside. And use the fixed ring to control the floating ball and the magnetic spring.

The switch is in the relevant position, which makes the float float up and down within a certain range. The magnet in the float is used to attract the contacts of the reed switch, which generates the opening and closing action.

More about: Float level sensor working principle

Applications of Multi-Point Liquid Level Float Switch

The Multi-Point Liquid Level Float Switch is suitable for:Control the pump operation to maintain the liquid level. Control the automatic loading and unloading of the tank. Control the liquid level or supply signals. Such as oil tanks, automatic cleaning systems, hydraulic tanks, low-pressure boilers, sewage treatment systems.

Shipbuilding Industry
Generator Facilities
Petrochemical Industry
Food/Beverage Industry
Waste Water/Water Purified Facilities
Electronic Industry
Dyeing and Finishing Industry
Chemical Industry
Rubber/ Plastic Industry
Hydraulic.

SI-U02 Multi Level Float Switch Dimension

Installation Precautions

Multi-core cables are recommended for wiring. The load of the controlled line must match the contact capacity of the float switch.
The installation position should be far from the water inlet, otherwise the switch will cause malfunction due to the fluctuation of the water inlet.
If the switch device is on the wall of the container, an L-shaped steel bracket can be added.
When the float switch is used in a circuit with an inductive load such as a motor, relay, solenoid coil, etc., it is recommended to protect the circuit in parallel at both ends of the load such as: RC (buffer), rheostat, diode, etc.
After the wiring is completed, please tighten the box cover and fix the connection port to ensure the junction box is waterproof.
The identification numbers on the terminal block of the terminal board correspond to the contacts of the floating balls from top to bottom.

More Featured liquid Level Sensors and Switches

**SI-U05 Cable Float Level Sensor & Swtich**

LD series Rigid Probe Magnetostrictive Level Transmitter

LR series Integral flange Magnetostrictive level sensor

LT series Digital Display Magnetostrictive liquid level sensor

Sino-Inst offers over 10 level transmitters for level measurement.

About 50% of these are liquid level meters, 40% is the tank level sensor.

A wide variety of level meters options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of level measurement instrumentation, located in China.

Request a Quote

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KimGuo11

drurylandetheatre.com

SI-U01 Float Level Sensor

Posted on February 12, 2020 by KimGuo11

Float Level Sensors with Magnetic Reed Switches for Continuous Level Measurement.

Float level sensor (float switch) is one type continuous level sensor for industrial level measurement. Float level sensor has a magnetic float that rises and falls as liquid level changes. The percentage of the liquid level, 4 ~ 20mA current and liquid level value, can be displayed on site. Applications like: water tank, fuel tank, level measurement and level control. Vertical, horizontal, and side mounted, all can be satisfied.

Please feel free to contact us for Techinical Support, or Request a quote for float level sensors (customization available).

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More Float
Level Sensors

Description of SI-U01 Float Level Sensor

SI-U01 float level meter is composed of three parts: magnetic float, sensor and transmitter. When the magnetic float changes with the liquid level, it floats up and down along the duct. The magnetic steel inside the float attracts the reed switch at the corresponding position in the sensor. So that the total resistance (or voltage) of the sensor changes. The changed resistance (or voltage) signal is converted into a current signal of 4-20mA and output. And the upper and lower limit alarms can be set on the display to achieve the position control of the liquid level.

SI-U01 floating ball liquid level gauge consists of a liquid level sensor and an intelligent HART board (current converter). The floating ball and the liquid level change synchronously, and the reed switch is controlled to open and close. This makes the resistance in the sensor change linearly. The change of resistance is converted by the converter into 4 ~ 20mA standard current signal or superimposed HART digital signal output.

Float level sensor can also be used with paperless recorder.

Features of SI-U01 Continuous Float Level Sensor

Intelligent electronic components are composed of a motherboard and an LCD screen;
You can adjust the range and zero point by pressing the button on the spot;
It can use HART communicator or microcomputer to communicate with this smart meter on both sides without interrupting the output signal.
It is suitable for explosion-proof or inconvenient installation and disassembly of the meter. Instrument measurement, process parameters, equipment configuration, calibration, diagnostic information HART protocol access or change;
Two-way communication with the host in the distributed control system using the HART protocol;
With EEPROM, no data is lost due to power failure.
Simple working principle, wide applicability, safe, convenient and maintenance-free
Realize the connection measurement of the liquid level without being affected by the physical and chemical properties of the measured medium. Such as: temperature, pressure, conductivity, dielectric constant, etc.
The use of different materials can achieve the measurement of highly corrosive media
It can be used to measure the interface of two different density liquids.
Good repeatability.

Specifications of SI-U01 Float Level Sensor

Max insert depth	L=6m(>6m customize)
Max control scope	L-120mm
Min control scope	50mm(<50mm customize)
Medium density	>0.5g/cm3
Working pressure	PN2.5~ PN160(Max pressure PN320)
Working temperature	-40~80 °C, -40~120 °C, -40~150 °C (250°C customize )
Float diameter	D28~D120(depending on pressure and density)
Installation type	Flange: DN40~DN150 Flange standard: HG/T20592~2009 (pressure>PN25, Flange>DN125) G2” thread Other method (consulting)
Maximum switch frequency	<1×105
Inaccuracy	±8±2mm
Working power supply	220VAC/380VAC
Max voltage of switch	<250VAC
Max current of switch	5A
Installation angle	< ±25°
Wiring box	M20×1.5 female thread
IP grade	IP65
Explosion-proof grade	Exd II CT6Gb

Float Level Sensor Operating Principle

Float level meter is an instrument for measuring liquid level. It is widely used in the field of liquid measurement. Many industries will choose to use it for measurement equipment. Such as the petroleum, chemical, and pharmaceutical industries.

Float level sensor is designed and produced based on the principle of buoyancy and static magnetic field. The position of a floating ball with a magnet (floating ball for short) in the measured medium is affected by buoyancy.

The change of the liquid level causes the position of the magnetic float to change. The role of the magnet and sensor (reed switch) in the floating ball changes the number of components (such as fixed resistance) connected in series to the circuit.

Thereby changing the electrical quantity of the instrument circuit system. That is, changes in the position of the magnetic float cause changes in the electrical quantity. The change of the electrical quantity is detected to reflect the liquid level in the container.

The float level sensor is installed on the top of the container through a connection flange. The float ball floats on the liquid surface according to the principle of discharging the liquid volume phase and so on.

When the liquid level of the container changes, the float ball also moves up and down. The reed switch of the ball level gauge is magnetically attracted to change the position of the liquid level into an electrical signal.

The actual position of the liquid is displayed digitally by the display instrument. The floating ball level gauge can achieve long-range detection and control of the liquid level.

Applications of SI-U01 Float Level Sensor

Float level sensors provide reliable readings in a range of operating environments.

Float level sensor can be widely used for continuous measurement of the liquid level (boundary level): High temperature. High pressure. Viscous, dirty media. Asphalt, wax-containing oil products and flammable, explosive, corrosive media.

Float level sensor can be used for industrial level measurement and control of various liquid tanks. Such as: Petroleum, chemical raw material storage. Industrial processes, biochemicals, medicine, food and beverage. Tank farm management and underground storage at gas stations.

The float level sensor is also suitable for dam water level, reservoir water level monitoring and sewage treatment, etc.

Of course, for different applications, you can choose different materials.

Such as:

Plastic materials PP and PVDF, suitable for strong acid and alkali places;

The metal material is SUS304 / 316L, which is suitable for high temperature 200 ℃ and high pressure 64kg/cm2.

Float level sensor Advantages and Disadvantages

Advantages

Long life span, stable and reliable operation, easy installation, almost no maintenance
None influence of measured medium in physical and chemical state. Eg: medium electrical conductivity, dielectric constants, foam, pressure, temperature, evaporation, boiling, bubbling effect etc, .
Choose appropriate material can be used in a variety of bad media environment with densities ≥ 0.5G/CC ;
Interface measurement with two media of different density control;
Wide range of application. Pressures from vacuum to PN160 (special up to PN320), temperature -40~+150 ° c
Design, explosion-proof, suitable for explosive environments;
Controller can be used to control the upper and lower liquid level.

Disadvantages

Low accuracy.
The installation position is limited by the shape of the container.
Most float level gauges are not suitable for corrosive or hazardous liquid media.

Float level sensor for water tank & fuel tank

In water treatment, the water tank float level switch is directly related to the safety and reliability of the entire process.

In a process, there are different types such as intermediate water tank, backwash water tank, produced water tank and waste liquid tank.

The sizes of these boxes are different. The volume of the produced water and the original water tank may be larger. In these water tanks, the water tank float level switch is used for related control.

Different level switches will have different actions. However, it is not necessary to have several level switches in a large water tank.

In the water tank, there are high and low level switches. The high level switch can detect whether the water tank is full. If it is full, the water production will stop. The low level switch is used to detect the water tank Is the water sufficient? If it is not enough, no more water can be sent out.

Water tank float level switch is a working condition word. If it is a large water tank, other level gauges can also be used to solve it. Like radar level gauges, ultrasonic level gauges, etc.

Of course, our float level sensor can also be used to measure and control the level of the fuel tank.

If it is used in an oil tank, special conditions such as the type of oil and corrosiveness need to be considered.

If you need to measure the level of the fuel tank. Please contact Sino-Inst sales engineers, we will provide you with suitable products and quotations based on your actual measurement situation.

Float Level Sensor for tank liquid volume monitoring

Our Float level sensors can output liquid level signals, such as 4-20mA signal, 0-10V signal, RS485 and so on.

However, the float level transmitter alone cannot calculate the liquid volume of tanks of different sizes. It’s too complicated. A separate recorder is required to calculate it.

Therefore, the digital display volume meter can collect, display and convert the liquid level of various regular and irregular tanks in the industrial field into the corresponding tank volume. It is suitable for monitoring, controlling and collecting various process parameters.

SI-U01 Float Leve Sensor Installation

The main float level sensor installation methods are:

Top mounted; Bottom mounted; Side mounted

SI-U01 Float level sensor installation instructions:

The measured medium should not contain ferromagnetic impurities.
In order to prevent the floating ball from falling off or hitting the sealing tube at high speed during transportation, which will cause the measuring tape to come out.
The meter should be fixed to the bottom of the sealed tube with a clamp and the magnetic steel on top of the sealed tube before the instrument leaves the factory.
Before installing and using, the user should remove the clamp. Raise the floating ball to the top of the sealing tube. And then slowly move the floating ball down, and the needle should be rotated accordingly.
The indicator of the meter is pointer type, the indicator numbers are arranged in the direction of gel needles during full-scale measurement, and the indicators are arranged in the counter-clockwise direction during emptyness measurement.
The instrument is equipped with a mounting flange when it leaves the factory. The user should have a pipeline flange.
The installation position of the instrument is generally selected at half of the measuring range.

Float level sensor price

Connection method
Probe diameter
Float distance
Probe length
Material selection

Sino-Inst is float level sensor manufacturer. On the premise of ensuring product quality, we will offer you the best price.

Frequently Asked Questions

Float level sensor uses magnetic float as the measuring element. Through magnetic coupling, the internal resistance of the sensor changes linearly. The smart converter converts the resistance change into a 4-20mA standard current signal. It can display the percentage of liquid level, the current of 4 ~ 20mA and the value of liquid level. Remote transmission control room can realize automatic detection, control and recording of liquid level. This instrument is suitable for petroleum, chemical, power, light industry and pharmaceutical industries, such as sewage treatment and medium level measurement in various atmospheric and pressure vessels, especially for underground tanks and tanks.

Float level sensor is composed of float, plunger and so on. The float ball level gauge is mounted on the top of the container through a connecting flange. The float floats on the liquid surface according to the principle of discharging the liquid volume phase and so on. When the liquid level of the container changes, the float also moves up and down. Due to the magnetic effect, the reed of the float level gauge is magnetically attracted and changes the liquid level position into an electrical signal. The actual position of the liquid is displayed digitally by the display instrument. The float level gauge thus achieves long-range detection and control of the liquid surface.

Liquid level switch, also known as water level switch, liquid level sensor. As the name suggests, it is a switch used to control the liquid level. It is mainly divided into contact type and non-contact type. Capacitive liquid level switches are commonly used in non-contact switches, and contact float type liquid level switches are most widely used. Electrode level switches, electronic level switches, and capacitive level switches can also be implemented using contact methods.

More about:

Liquid level float switch technology|continuous-point level

1. Float level switch: The magnetic float of the float level switch rises or falls with the liquid level. So that the sensor detects the position of the reed switch chip in the tube, and sends a contact on / off switch signal. Because of its simple structure and economic benefits, it is widely used in the market, mainly for civilian use. But its stability is relatively poor compared to industrial-grade products.
2. Capacitive liquid level switch: After the probe is wetted, it detects the change in capacitance value and outputs a contact signal. Which has certain advantages in the measurement of slightly viscous media.
3. Electrode type liquid level switch: The electrode type liquid level switch uses the conductivity of the liquid to detect the level of the liquid. Once the measured medium touches the pole, it will conduct electricity and detect the signal. After the signal of the controller is amplified, a contact signal is output to realize the control of the liquid level.
4. The photoelectric liquid level switch: The photoelectric liquid level switch uses infrared detection, using the principle of refraction and reflection of light. The reflection or refraction of light at the interface between two different media. When the measured liquid is at a high level, the measured liquid and the photoelectric switch form an interface. When the measured liquid is at a low level, air and the photoelectric switch form another interface. These two interfaces make the photoelectric switch internal light. The intensity of the reflected light received by the receiving crystal is different, that is, it corresponds to two different switching states. Generally speaking, compared with other measuring instruments, the applicability of photoelectric switches is poor.

5. Tuning Fork Liquid Level Switch: It outputs a switch signal by detecting the change in the frequency and amplitude of the fork’s vibration, which is highly versatile. For the viscous working conditions, please consult with the manufacturer to determine the working conditions that are easy to crystallize.
6. Ultrasonic external liquid level switch: The instrument probe emits ultrasonic waves and detects its residual vibration signal in the container wall. When the liquid passes through the probe, the amplitude of this residual vibration signal will become smaller. This change is detected by the instrument After that, a switching signal is output. It is a non-contact type and is often used in high-risk situations where it is difficult to open holes on the site, but the cost is relatively expensive.
The above is an introduction to the types of common level switches in the market. For more information about level switches (level switch, level switch), level meters (level meter, level meter) and other level measuring instruments, please contact us.

Extended reading: Ultrasonic Level Switch-External Mounted

Float switch is a kind of special switch. Because it does not need power supply to provide power, it is a very simple pressure switch. Its volume is small, the material is stainless steel or plastic, and the working life is very long. It has been widely used in water treatment.
The advantage of the float switch is that it can accurately measure the water level of the liquid. So it is generally used in the liquid detection of normal pressure or pressured storage tanks for signal transmission, such as liquid level alarm. Strong. It can accept multi-point control, and its use position can be left to the customer. It does not need a power supply to ensure its environmental protection. Its life is about 2 million switches. No matter the price of the product itself or the installation cost are very affordable, the price is very high. High degree of protection. It can work under high temperature or high pressure conditions, and has high safety.

If you cannot find an answer to your question in our Float Level Sensor, you can always contact us and we will be with you shortly.

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Sino-Ins is a manufacturer of Float Level Sensor. We provide more than 20 types of Float Level Sensors.

Float Level Sensor uses a magnetic floating ball as a measuring element. Through magnetic coupling, the internal resistance of the sensor changes linearly. The resistance change is converted into a 4~20mA standard current signal by an intelligent converter.

Float Level Sensor on-site liquid crystal display can display the percentage of liquid level, 4~20mA current and liquid level value on site. The remote supply control room can realize automatic detection, control and recording of liquid level.

Float Level Sensors can be widely used in the continuous measurement of high temperature, high pressure, viscous, dirty media, oil products such as asphalt, wax, and liquid levels (interfaces) of flammable, explosive, corrosive and other media.

Float Level Sensors can be used for liquid level industrial measurement and control of various liquid tanks such as petroleum, chemical raw material storage, industrial process, biochemical, pharmaceutical, food and beverage, tank farm management and underground storage of gas stations.

Float Level Sensors are also suitable for dam water level, reservoir water level monitoring and sewage treatment, etc.

Sino-Inst’s Float Level Sensors, made in China, have good quality, with better prices. Our Float Level Sensors are widely used in China, India, Pakistan, USA and other countries.

Sino-Inst’s entire team is well trained, so we can ensure that each customer’s needs are met. If you need any help with your product requirements, whether it is a Float Level Sensors, level sensors, or other equipment, please give us a call .

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KimGuo11

drurylandetheatre.com

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