Yearly Archives: 2021

Ultrasonic water flow meters | Accurate and Easy solution

Posted on by

The ultrasonic water flow meter is a meter that measures water flow by detecting the effect of water flow on ultrasonic beams (or ultrasonic pulses). The more commonly used methods are the time difference method and the Doppler method.
The time difference method can measure water, seawater, acid and alkali, edible oil, gasoline, alcohol, and other uniform liquids that can transmit and transmit ultrasonic waves.
If it is sewage, which contains impurities, bubbles, etc., an ultrasonic flowmeter based on the principle of the Doppler method is used.

RFQ More water meters
Ultrasonic water flow meters

Ultrasonic water flow meter types

According to the measurement principle

  • Time difference method ultrasonic flowmeter;
  • Frequency difference method ultrasonic flowmeter;
  • Phase difference method ultrasonic flowmeter;
  • Doppler ultrasonic flowmeter;
  • Ultrasonic flowmeters for partially full pipes and river channels that combine liquid level measurement and average flow velocity measurement.

According to the way of use

  • Portable ultrasonic flowmeter;
  • Fixed (standard pipe section) ultrasonic flowmeter.

According to the installation method of the transducer

According to whether the transducer is in contact with the fluid

  • Intrusive (contact) ultrasonic flowmeter;
  • Non-invasive (non-contact) ultrasonic flowmeter.

According to the nature of the measured fluid

  • Liquid ultrasonic flowmeter;
  • Gas ultrasonic flowmeter.

According to the number of transducer channels

  • Mono ultrasonic flowmeter;
  • Two-channel ultrasonic flowmeter;
  • Multi-channel ultrasonic flowmeter.

Extended reading: 2 inch Water Flow Meter

Ultrasonic flowmeters use sound waves to determine the velocity of a fluid flowing in a pipe.

At no flow conditions, the frequencies of an ultrasonic wave transmitted into a pipe, and its reflections from the fluid are the same.

Under flowing conditions, the frequency of the reflected wave is different, due to the Doppler effect.

When the fluid moves faster, the frequency shift increases linearly.

The transmitter processes signals from the transmitted wave, and its reflections to determine the flow rate.

You may like: Digital Flow Meters Guide| Liquid and Gas

Generally, an ultrasonic flow meter is the device, that uses ultrasound to measure the velocity of liquid flow, that helps in determining the volume of liquid flow also.

The ultrasonic flow meters are made using the ultrasonic transducers, which are clamped to the external surface of a pipe, to generate the ultrasonic pulses through the pipe.

When the liquid flows inside the pipe, it creates the time difference in the pulses, and these are examined to calculate the accurate flow velocity of the liquid.

There are many advantages of using the ULTRASONIC flow meters which include:

  • The electronics in the ultrasonic flow meter includes ultrasonic flowmeter detector which compensates and adapts to the changes in the profile of the flow, type of the liquid and material of the pipe.
  • A portable ultrasonic flow meter converter can be used as a direct method to determine the flow rates effectively when compared to the other flow systems.
  • Ultrasonic flow meter converter is inexpensive to use and maintain when compared to the other mechanical flow meters as they are no moving parts in these flow meters.
  • Their design is highly sophisticated and they do not obstruct the liquid flow, so they can be used for sanitary, corrosive and abrasive liquids.

These are the advantages of the ultrasonic flow meters and there are many disadvantages of the Ultrasonic flow meter which include:

  • The main disadvantage of the ultrasonic flow meter is the cost. The cost of the flow meter is very high when compared to the other types of mechanical flow meters.
  • The ultrasonic flow meters are sophisticated when compared to the mechanical flow meters, so it needs experts to repair and maintain the flow meters.

These are the advantages and disadvantages of the ultrasonic flow meters.

Extended Reading: Inline Ultrasonic Flow Meter

The accuracy of Ultrasonic water flow meter supplied by Sino-Inst is 1%. Can meet most of the measurement needs.

Extended reading: Industrial VS Residential inline water flow meters

Ultrasonic Clamp-on Flow Meter is composed of an integrated host and external clamp-on sensors. Clamp-on Flow Sensors are available at room temperature and high temperature.

The clamp-on flow meter (Model: 2000) is composed of an integrated host and ultrasonic clamp-on sensor. The clamp-on flow meter is widely used in the online flow measurement of various liquids. Just stick the external clamp sensor on the pipe surface. Compared with the traditional flowmeter, it does not need to cut off the pipe and flow. The installation is convenient and quick, and the non-destructive installation is truly realized.

Clamp on Flow Meter Reference price: USD 470.00/pc

Extended reading: Make Ultrasonic Open Channel Flow Meter Work for You

A handheld Portable ultrasonic flow meter realizes the non-contact measurement of liquid flow. Also often referred to as Portable Clamp-On Ultrasonic Flow Meter for Liquids.

Handheld Portable Ultrasonic Flow Meter ( Model:2000H) has been successfully applied to measurement work in various industries. The measuring range is 20-6000mm (0.5-20 inches). A non-contact measurement method is adopted. Flexible operation and easy to carry. Conductive or non-conductive, corrosive or non-corrosive liquids can be measured. Various fluids: water, pure water, sewage, seawater, chemical fluids, river water, fuel Oil, etc. can be measured.

Handheld Portable Ultrasonic Flow Meter Reference price: USD 470.00/pc

Extended reading: Typical Applications of Handheld Ultrasonic Flow Meter

Extended Reading: Chilled Water Flow Meter

Ultrasonic Gas Flow Meter uses the principle of measuring the transit time of ultrasonic waves in the pipeline. Ultrasonic Gas Flow Meter is an ideal choice for various gas measurements.

The gas ultrasonic flowmeter is suitable for blast furnace gas, converter gas, coke oven gas, mixed gas, gas, compressed air, chlorine, nitrogen and other industrial gases. Suitable for large-caliber gas measurement, suitable for low flow rate, pulsating flow gas measurement. It has the advantages of not being affected by gas components, dirt resistance, fast response, wide range, high precision, good stability, and less maintenance.

Featured Ultrasonic water flow meters

Portable Ultrasonic Flow Meter
Handheld Ultrasonic Flow Meter
Ultrasonic Clamp on Flow Meter
Strap on flow meter X3
Ultrasonic Water Meter for Residential Water
Ultrasonic Insertion Flow Meter
Insertion Ultrasonic Water Flow Meter
Dual Channel Ultrasonic Water Meter
In-Line Ultrasonic Flow Meter
Ultrasonic Open Channel Flowmeter
Multipath Transit Time Ultrasonic Flow Meter
Portable Doppler Flow Meter

Extended reading: Insertion Ultrasonic Water Flow Meter – Designed for Agricultural Irrigation, Garden Management

Why is it more appropriate to use a Doppler ultrasonic flowmeter to detect sewage pipes?

What kind of flow monitoring equipment should you choose for ordinary sewage pipes?

What kind of flow monitoring equipment should we choose for ordinary sewage pipelines?

The electromagnetic flowmeter can only measure the condition of the full tube. Therefore, the measurement result will be unstable when the tube is not full. Because the non-full tube state can be understood as an extreme situation in which a large number of bubbles exist in the measured liquid medium.

There are two situations when the pipe is not filled with liquid. One is that the liquid level is higher than the level of the electrode. The other is lower than the level of the liquid being measured.

When the liquid level in the pipe is higher than the electrode level. If the front and back straight sections of the pipeline are in an ideal state at this time. Generally, the precision data measured by electromagnetic flow is relatively stable. However, because the flow meter liquid contains the gas volume in the pipeline, there is undoubtedly a large measurement error in this measurement state.

When the electrode is higher than the level of the electrode, the electrode is exposed in the air at this time. The measurement circuit is actually in an open state, and the electrode cannot directly contact the liquid. The value and output are in a random state. If the electrode is constantly shaking or full, the electrode will not work normally, and the measurement will not be carried out.

The measurement of the intelligent electromagnetic flowmeter is not only inaccurate, but also damages the electrodes.

However, many sewage pipes are caused by partial pipes. Only when it rains does the tube become full. So what kind of flow measurement method is the most appropriate in such a situation?

At present, the most advanced technology in China is the use of a Doppler ultrasonic flowmeter. Such as rain and sewage pipes. It can accurately monitor the water level, flow rate, flow rate and instantaneous flow rate, cumulative flow rate, water temperature, and other data. It can be refreshed in real-time, and the installation is very simple.

Extended reading: Ultrasonic flow detectors types

You may like:

Mechanical Flow Meters

Selection Guide What is a mechanical flow meter? Mechanical flow meters are a type of flow…

Inline water flow meters

Featured inline water flow meters Strap on flow meter X3  External clamp-on flow sensor. Easy to…

Sino-Inst, Manufacturer for Ultrasonic water flow Meter. It can measure a single sound-conducting liquid medium of DN 15—150mm. It can measure even liquids such as water, seawater, oil, and slurry.

Sino-Inst’s Ultrasonic water flow meters, made in China, Having good Quality, With better price. Our flow measurement instruments are widely used in China, India, Pakistan, the US, and other countries.

Request a Quote

Please enable JavaScript in your browser to submit the form

Water Tank Level Sensors for Level Monitoring & Control System

Posted on by

The water tank level sensor is an integral part of the water level monitoring and control system. They are responsible for real-time detection and feedback of the water level in the water tank. Water tank level sensors, solenoid valves, control boxes, liquid level switches and other accessories can be used to effectively form a water Level Monitoring & Control System. For example, in scenarios such as sewage treatment, drinking water storage and agricultural irrigation, the water pump switch can be automatically adjusted to control the Water intake and drainage to ensure stable water levels. Therefore, selecting an appropriate tank level sensor is a fundamental and critical task for any system that requires accurate water level monitoring.

RFQ

Water Tank Level Monitoring and Control Systems

Water Tank Level Monitoring and Control Systems are a sophisticated set of technical devices used to track and manage water levels in water tanks in real time. Such systems typically include key components such as level sensors, controllers, displays, and actuators (such as pumps or valves).

  • Water Tank Level sensors are the core of the system, responsible for measuring and transmitting water level data. These sensors can be of various types such as float type, pressure type, ultrasonic type, capacitive type, etc., selected according to different application scenarios. They convert water level changes into electrical signals and send them to the controller in real time.
  • The controller is the brain of the system. It receives signals from the sensors and makes judgments based on the preset water level range. For example, when the water level is below the minimum limit, the controller will start the water pump to fill the water. When the water level reaches the maximum limit, the water pump will be stopped or the drainage valve will be opened to avoid overflow.
  • The display provides the operator with an intuitive interface showing current water levels, as well as system status and alarm information. This information helps operators understand whether the system is functioning properly or if manual intervention is required.
  • Finally, actuators, such as pumps and valves, are the actual devices that respond to controller commands and are responsible for physically regulating the flow of water. The system can automatically or manually adjust these mechanisms as needed to maintain water level stability.
Extended reading: Hydrostatic Level Measurement

Therefore, with Water Tank Level Monitoring and Control Systems, automatic management and control of water tank level can be achieved.

When the water level of the water tank drops to the set lower limit water level value, the liquid level controller sends a command to instruct the pump valve to open the water supply.

When the water level reaches the set upper limit water level value, the controller will issue an instruction to instruct the pump valve to close and stop the water supply.

In the same way, if necessary, the liquid level controller can also instruct the water pump or electric valve to perform the opposite operation.

Extended reading: Magnetostrictive Hydraulic Cylinder Position Sensor

Extended Reading: How to Measure Volume of Liquid

Water Tank Level Sensors Types

The water tank level sensor is a key device to ensure the accuracy of water level monitoring. According to their working principles and application environments, they can be mainly divided into the following types:

  • Float level sensor: This is a traditional liquid level sensor that detects water level changes by moving the float up and down. When the water level rises, the float floats up and drives the switch through the mechanical device to control the opening and closing of the water pump or valve. This kind of sensor is suitable for environments with relatively clean water and no large amounts of impurities and chemicals.
  • Pressure level sensor: also called submersible level sensors. This sensor determines the water level by measuring the pressure exerted by the liquid on the sensor. It is suitable for deep water environments such as deep wells and storage tanks, and can work stably under high pressure conditions.
  • Ultrasonic level sensor: An ultrasonic sensor calculates water level height by emitting ultrasonic waves and receiving their echoes. It is suitable for situations that are corrosive or polluting to contact sensors, such as wastewater and chemical storage tanks.
  • Radar water level sensors: Radar water level sensors have absolute advantages in large-range non-contact measurement. Radar Water Level Sensor can be 0.05m～35m ~70m~120m. Commonly used to measure water level monitoring in dams, reservoirs, rivers, etc.
  • Capacitive level Sensors: Capacitive sensors use changes in capacitance to detect fluid levels. They are ideal for level detection of viscous liquids or powdery substances, as these materials may interfere with other types of sensors.
  • Photoelectric level Sensor: Photoelectric sensors determine water level by detecting the obstruction or reflection of light by the liquid. This sensor is suitable for water level monitoring in small containers or cleaning liquids.

Comparison of digital sensors and traditional mechanical sensors:

Digital level sensor: Using advanced electronic technology, it can provide continuous, high-precision water level readings. And it can be seamlessly integrated with computer systems to facilitate remote monitoring and data analysis. They generally have better long-term stability and immunity to interference.

Traditional mechanical level sensors: usually refer to float sensors, which sense water level changes through a simple mechanical structure. Although these sensors are simple and low-cost, they are often less accurate than digital sensors and are susceptible to mechanical wear and water quality.

When selecting a water tank level sensor, it is important to select the most appropriate type based on factors such as the actual application environment, accuracy requirements, and whether remote monitoring is required.

Extended reading: Industrial Tank level indicators and Tank Level Gauges

We, Sino-Inst, are a professional manufacturer of Water Tank Level Sensors. Provide users with more than 50 types of Water Tank Level Sensors and switches.

Featured Water Tank Level Sensors

SI-151 Hydrostatic Level Sensor
Radar Water Level Sensor 0.05m～35m ~70m~120m
SI-PCM261 Submersible Pressure Transducer
SI-PCM260 Deep Well Water Level Sensor
Remote Seal Differential Pressure Transmitter
Differential pressure(DP) level transmitter
SI-U02 Multi-Point Liquid Level Float Switch
SI-U01 Float Level Sensor
LT series Digital Display Magnetostrictive liquid level sensor
ULT-100A Ultrasonic Level Transducer
ULT-200 Ultrasonic Level Detector
SI-U03 Float Switch Water Level Controller

PLC liquid level display alarm

Programmable Logic Controller, PLC for short. A digital electronic device with a microprocessor. A digital logic controller used for automatic control. Control instructions can be loaded into the memory for storage and operation at any time.

The programmable controller is modularized by internal CPU, instruction and data memory, input and output unit, power supply module, digital-analog, and other units.

PLC can receive (input) and send (output) many types of electrical or electronic signals. And use them to control or supervise almost all types of mechanical and electrical systems.

Extended reading: ultrasonic level sensor for diesel tank

Program through the PLC system to realize the automatic level control system. It is composed of hardware and software. The hardware mainly includes PLC touch screens and related modules such as CPU, storage, output and input, power supply. On-site measurement includes various types of adaptation to different sites Conditional sensors, switches, etc. Also include sound and light warning lights, control buttons, and other related equipment.

By configuring the PLC liquid level display alarm device, it can realize the display of industrial site liquid level measurement, high and low liquid level alarms. As well as the opening and closing of pumps, valves, and other equipment. Unattended automatic workflow can be realized. Greatly improve production The efficiency, saving human cost. This brings about an increase in corporate benefits. It lays the foundation for the company to take the lead in severe competition in the future.

Therefore, in the current situation, whether it is a newly established project or a modified project, it is recommended that PLC equipment is the first choice when conditions permit.

Extended reading: Magnetostrictive Hydraulic Cylinder Position Sensor

Extended Reading: How many types of level transmitters are there?

Wireless water tank level sensor-Future Trends

Wireless GPRS liquid level alarm device, can be configured with eight channel alarm device, liquid level display alarm device, LED display. It can support liquid level meter switch, float level switch, pressure transmitter, thermocouple, thermal resistance, voltage, Current and transmitter input. Suitable for monitoring of industrial process quantities such as temperature, pressure, flow, and liquid level.

Extended Reading: 3 inch (3″) Water Meter

Construction-free installation: It can replace the connecting cable, and the transmission distance is long, eliminating the trouble of cable construction.

Support 8-channel alarm function, power supply 220VAC or 24VDC switching power supply. For explosion-proof occasions, explosion-proof sensors and explosion-proof instrument boxes can be used.

On-site measurement end. Configuration:

  1. 　Level gauge (can be equipped with level gauge, pressure gauge, temperature gauge)
  2. 　Signal acquisition instrument meter box (common type and explosion-proof type are optional)
  3. 　The switch quantity acquisition module is included in the instrument box
  4. 　DTU module in the instrument box

Extended reading: Ultrasonic Level Switch-External Mounted

FAQ

The function of the liquid level sensor is to detect the liquid level. The liquid level sensor is widely used in electrical appliances and industrial equipment that require water level control. The liquid level sensor can realize the function of water shortage protection.

Principle of water level sensor:
The water level sensor has a sensor. Transform the sensed water level signal into a current signal.

There are many types of water level sensors, so their specific measurement principles are different.
If you need to learn more. You can refer to:
Differential pressure type liquid level measuring instrument;
Float level measuring instrument;
Electric liquid level measuring instrument;
Ultrasonic liquid level measuring instrument;
Radar liquid level measuring instruments, etc.

Extended reading: Capacitive water level sensor

According to the situation of the tank, different types of water level sensors can be selected to monitor the water level of the water tank. Such as static pressure type liquid level sensor. It can be digitally displayed locally and the liquid level value can be displayed. It can also be output by a 4-20mA signal. Connect the signal to the secondary display instrument to monitor the level of the water tank.

Extended reading: Radar Non Contact Water Level Sensor

Extended reading: Radar Water Level Sensor Applications

Common water level sensors can be used for water level control. There are also sensors that can output switching signals, such as float level switches, and can also be used for water level control.

Extended reading: PID Controller Working Principle

The liquid level switch, as the name implies, is a switch used to control the liquid level. In terms of form, it is mainly divided into contact type and non-contact type.

Non-contact type such as capacitive liquid level switch.

Contact type such as: float type liquid level switch, electrode type liquid level switch, electronic liquid level switch.

The capacitive liquid level switch can also be realized by a contact method.

Extended reading: Float Switch Water Level Controller

Installing a tank level sensor is a process that requires precision and care. Specific installation steps may vary depending on sensor model and functionality, so be sure to carefully read the manufacturer’s operating manual and installation guide before installation. If necessary, consult a professional or contact the manufacturer’s technical support. Here are the basic steps and recommendations for installing a water tank level sensor:

Determine the installation location:
For float sensors, choose a location inside the tank that is not disturbed by the incoming and outgoing water flows.
For ultrasonic or capacitive sensors, the top center position of the water tank should be selected to ensure that there is a certain vertical distance between the sensor and the water surface (usually at least 30cm).

Install fixtures:
Depending on the sensor type and tank material, install the fixing bracket or mounting plate.
Make sure all fixings are securely attached to the tank to prevent the sensor from moving or falling off.

Connect power and output:
Connect the power and signal cables (e.g. 2-wire 4-20mA) according to the instructions provided by the manufacturer.
If the sensor has special power requirements (such as DC24V), please make sure the power adapter meets the requirements.

Debug the sensor:
Turn on the power and follow the instructions for preliminary settings and calibration.
For sensors that require calibration, a standard water level can be used to set upper and lower thresholds.

Check system operation:
Check that the sensor accurately reflects changes in water level.
Make sure there is no water leakage at all connections and the signal output is stable.

How to choose right Water Tank Level Sensor for your System

When selecting a tank level sensor and monitoring system, you need to consider the following specific recommendations and reference values:

Application Environment:

  • Water quality: If the water contains corrosive chemicals, sensors made of corrosion-resistant materials should be selected.
  • Temperature: Make sure the sensor’s operating temperature range covers your application environment, such as -20°C to 80°C. If 80°C~150°C, you can refer to high temperature level sensors.
  • Pressure: If used in deep wells, the sensor should be able to withstand a pressure of at least 2MPa.

Accuracy requirements:

  • If the water level needs to be accurately controlled (error range ±1mm), high-precision sensors such as ultrasonic or capacitive sensors should be used.
  • For general agricultural irrigation systems, the error range can be relaxed to ±5mm.

Installation and maintenance:

  • Choose a sensor that is easy to install and configured with appropriate mounting dimensions. Such as threads, flanges, clamps, etc.
  • Maintenance frequency: Choose sensors with high reliability (such as MTBF (mean time between failures) greater than 100,000 hours) to reduce the number of maintenance times.

Ease of use:

The user interface should have clear numerical or graphical displays to ensure easy operation.

Integration and Compatibility:

Choose sensors that support standard signal output and communication protocols (such as 4-20 mA, 0-10V, Modbus, etc.) to ensure compatibility with remote monitoring systems.

Budget and Cost Effectiveness:

  • Calculate the total cost of ownership, including purchase, installation, scheduled maintenance and potential breakdown repairs.
  • Consider sensors with energy-saving features, such as low-energy designs (power consumption less than 0.5W) to reduce operating costs.

Supplier technical support and services:

Choose sensors that offer at least a one-year warranty, and make sure the supplier has service points in the country for quick response.

By considering the specific recommendations and reference values above, you can select a tank level sensor and monitoring system that meets your technical requirements while being cost-effective.

More level monitoring solution

Extended reading: Fuel-Diesel-Water Tank Level Sensor Monitoring

When choosing a suitable water tank level sensor and monitoring system, we must consider a variety of factors, such as application environment, accuracy requirements, ease of installation and maintenance, and budget.

At the same time, we also provide other types of measuring instruments, such as wastewater flow measurement, liquid level measurement and pressure measurement equipment. These high-quality instruments can help you build a more comprehensive monitoring system.

Our Sino-Inst offers over 20 Water Tank Level Sensors for level measurement. About 50% of these are liquid level meters, 40% is the tank level sensor. A wide variety of Water Tank Level Sensors options are available to you, such as free samples, paid samples.

We offer a variety of measurement solutions and support customization to meet your specific needs. If you need professional advice or customized services, please contact us!

Request a Quote

Please enable JavaScript in your browser to submit the form

What Is an Air Pressure Transducer?

Posted on by

An Air pressure transducer is a sensor that converts the mechanical signal of air pressure into a current signal. Pressure has a linear relationship with voltage or current, and it is generally proportional. Therefore, the output voltage or current of the transmitter increases as the pressure increases. From this, a relationship between pressure and voltage or current is derived.

RFQ More Pressure Sensor

Featured air pressure transducers

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
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. 
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 .

Pressure transducer is a high-precision instrument that can perform on-site inspection of pressure parameters, and is widely used in industrial measurement and control processes. It can be used to measure the pressure, differential pressure and absolute pressure of various media such as liquid, gas and steam. Then the pressure signal is converted into 4-20mADC signal output to supply secondary instruments such as indicating alarm, recorder, regulator, etc. for measurement, indication and process adjustment.

Extended reading: extrusion melt pressure transducer

The functional principle of a resistive pressure transmitter is very simple. The pressure sensor converts the mechanical pressure value into a proportional electrical signal. The pressure sensor typically consists of a stable main body and a (thin) diaphragm.

The diaphragm is the most important element for the measurement of pressure and is equipped with strain-sensitive and compression-sensitive resistance structures, so-called strain gauges (DMS). The diaphragm is deflected under the influence of pressure. 

Thus, the strain gauges attached to it are elongated or compressed and its electrical resistance changes. This change in resistance is directly proportional to the pressure.  For example, if the resistors are wired to a Wheatstone measuring bridge, the resulting electrical signal can be measured and transferred to an indicator.

Extended reading: Pressure indicator transmitters

Read more about: What is a pressure sensor and how it works? 

There are different types of pressure transducers based on their design.

These sensors can come in several shapes and sizes, but the technology inside can also differ. 

There 4 main types of pressure sensors based on this: 

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

More about Industrial Pressure Sensors

Extended Reading: Electronic Pressure Switch for Air Compressor

The terms pressure sensor, pressure transducer and pressure transmitter are often used interchangeably. We usually define relevant measurement parameters and output signals to distinguish products.

Of course, if you want to strictly distinguish these three words from a technical point of view, you can refer to the following brief introduction:

PRESSURE SENSOR

Millivolt (mV) output signal (also a general term for all pressure types); a device that measures pressure.

The millivolt output signal can typically be used ten (10) to (20) feet away from the electronics without significant signal loss. The signal is proportional to the supply. A 5VDC supply with a 10mV/V output signal produces a 0-50mV output signal.

Older technologies such as bonded foil strain gage or thin film technology produce 2-3mV/V (millivolts per volt), whereas MEMS technology can produce 20mV/V reliably.

Millivolt output signals give the design engineer the flexibility to condition the output signal as their system needs it and can reduce package size and cost.

Extended Reading: 4-20ma pressure transducer wiring diagram

PRESSURE TRANSDUCER

High level voltage or frequency output signal including 0.5 to 4.5V ratiometric (output signal is proportional to the supply), 1-5V and 1-6kHz. These output signals should be used within twenty (20) feet of the electronics.

Voltage output signals can offer low current consumption for remote battery operated equipment such as wellhead SCADA systems.

Supply voltages are typically from 8-28VDC, except for the 0.5-4.5V output, which requires a 5VDC regulated supply.

Older voltage output signals, such as 0-5V, do not have a “live zero” where there is signal when the sensor is at zero pressure. The risk is that the system does not know the difference between a failed sensor with no output and zero pressure.

Extended Reading: Smart pressure transmitter

PRESSURE TRANSMITTER

Current output signal, i.e. 4-20mA (4 to 20mA), the current, rather than the voltage, is measured on the device, rather than the voltage; Sino-Inst pressure transmitters are two wire devices (red for supply, black for the ground).

4-20mA pressure transmitters offer good electrical noise immunity (EMI/RFI), and will need a power supply of 8-28VDC. Because the signal is producing current, it can consume more battery life if operating at full pressure.

Extended reading: Pressure Sensor Applications In Various Industries

Pressure Transducer is a device or device that can sense the pressure signal and convert the pressure signal into a usable output electrical signal according to a certain law. Pressure sensors are usually composed of pressure sensitive elements and signal processing units. According to different test pressure types, pressure sensors can be divided into gauge pressure sensors, differential pressure sensors and absolute pressure sensors.

Pressure sensor is the most commonly used sensor in industrial practice. It is widely used in various industrial automation environments, involving water conservancy and hydropower, railway transportation, intelligent buildings, production automation, aerospace, military, petrochemical, oil wells, electric power, ships, machine tools , pipeline and many other industries, the following briefly introduces some common sensor principles and their applications. Another medical pressure sensor.

Our pressure transmitters can also be upgraded to Low power-battery powered Wireless Pressure Sensors.

The pressure switch adopts high-precision, high-stability pressure sensor and transmission circuit, and then uses the CPU modular signal processing technology to realize the detection, display, alarm and control signal output of the medium pressure signal.

Pressure switches can be widely used in petroleum, chemical, metallurgy, electric power, water supply and other fields to measure and control the gauge pressure and absolute pressure of various gases and liquids. It is an ideal intelligent measurement and control instrument for industrial sites. Pressure switches are widely used in aerospace and military fields, such as M1A1 tanks, Apollo spacecraft, Boeing 747, Airbus A320, F22, F117 and other product manufacturing.

A pressure switch is not the same as a pressure sensor:

(1) The pressure sensor is composed of a pressure-sensitive element and a conversion circuit. It uses the pressure of the measured medium to impregnate the pressure-sensitive element to produce a small changing current or voltage output.
(2) The pressure switch is a utility switch that automatically turns on or off when the set value is reached.

Extended Reading: strain gauge pressure transducer

What is the difference between a pressure switch and a pressure sensor

  1. Difference in function

(1) As the name suggests, the pressure switch is a switch. It is just that the pressure is set in advance. When the measured medium reaches this pressure, the switch can be turned on or off automatically. The pressure switch must be given a pressure value in advance, and then open or close the switch. It is used for simple control, and it is all switching output.

(2) The pressure sensor can not only output analog signals, but also output digital signals. Digital signal processing is more convenient, and it can also be transmitted remotely. The pressure sensor is composed of a pressure-sensitive element and a conversion circuit. The pressure of the measured medium acts on the pressure-sensitive element to generate a small change of current or voltage output.

  1. Price difference

The pressure sensor is naturally much more expensive than the pressure switch. Because the pressure sensor has an internal signal conditioning circuit. Considering the service life and safety, the pressure sensor is much more cost-effective than the pressure switch. The after-sales service, product reputation, The market difference is better than the pressure switch. Obviously, the pressure sensor is still the priority.

  1. Differences in the mode of action

(1) The sensor often needs to be used in conjunction with an external amplifier circuit to complete the process from pressure detection to control and display. Since the pressure sensor is a primary component, the signal fed back by the pressure sensor needs to be processed, analyzed, stored, and controlled through the measurement and control system, so that industrial automation equipment and project operation control are more intelligent.

(2) The pressure switch does not need other cooperation. When the pressure is sensed, it can complete the work independently.

Extended reading: How to calibrate HART pressure transmitters

Air pressure transducer selection:

  1. Measuring range (range)
  2. The output signal, communication protocol, whether with display meter
  3. Process interface (general, please provide thread specifications, flange type, provide specific flange standard, flange size, capillary length, process medium temperature, and other information)
  4. Electrical interface
  5. Installation method (horizontal installation or vertical installation)
  6. Mounting bracket (flat bracket or L-shaped bracket, bracket material requirement: carbon steel or stainless steel)
  7. Other requirements (explosion-proof, explosion-proof, lightning arrester, water, and oil prohibition treatment, etc.)

Read more about Gas Pressure Transducer-Sensor for Gas Pressure Measurement 

Tools for converting and calculating pressure values

Absolute pressure-Gauge pressure ConverterPressure Unit ConverterLiquid Depth/Level to Hydrostatic Pressure Calculator
Differential Pressure CalculatorPressure Transducer 4-20ma Output CalculatorPressure to Liquid Level Calculator

More Pressure Measurement Products

Diaphragm Seal Pressure Transmitter
SI2088-W Wireless Pressure Transmitter
SI-1110 Wireless Pressure Transducer
Differential pressure(DP) level transmitter
SI-151 Hydrostatic Level Sensor
Wireless Level Sensor – LoRa 
Flange Mounted Differential Pressure Transmitter
Extended Diaphragm Seal DP Level Transmitter
Remote Seal Differential Pressure Transmitter
Differential pressure(DP) level transmitter
SI-PCM260 Deep Well Water Level Sensor
SI-302 Anti-corrosive Submersible Level Transmitter

Frequently
Asked
Questions

Help Center

Here we briefly introduce the use of some pressure transmitters;

  1. It is directly used for the measurement of various pressures: air pressure, water pressure, hydraulic pressure (including water pressure), various blood pressure measurement of people in life, etc.;
  2. Pressure sensors are used in automobiles, some high-end motorcycles and almost all internal combustion engines;
  3. Liquid level meter: Most of the field meters used for various liquid level measurement are also pressure sensors;
  4. The source of the weighing signal of most electronic weighing scales and truck scales is also the pressure sensor.
  5. Pressure sensors are also used for acceleration measurement in aviation and aerospace.

There are many others, too many to list.

There are two measurement methods:

  1. Pass the current test of the multimeter, the steps are as follows:
  • The red test lead of the multimeter is connected to the hole of mA, and the black test lead is connected to COM.​​
  • Adjust the gear of the multimeter to the DC mA gear.
  • The red test lead of the multimeter is connected to the positive pole of the 4-20mA sensor output, and the black test lead is connected to the negative pole of the 4-20mA sensor output.
  • Read the reading from the display area of ​​the multimeter, and the reading is the current value.
  1. Through the multimeter’s 10,000-voltage range measurement, for the multimeter without the current test function, the current value can be measured by the voltage, and the steps are as follows:
  • At the output of the 4-20mA sensor, connect a sampling resistor of about 100 ohms.
  • The red test lead of the multimeter is connected to the hole of mA, and the black test lead is connected to COM.​​
  • Adjust the gear of the multimeter to DC V gear.
  • The red test lead of the multimeter is connected to the positive pole of the 4-20mA sensor output, and the black test lead is connected to the negative pole of the 4-20mA sensor output.
  • Read the reading from the display area of ​​the multimeter, the reading is the voltage value, and the current value can be obtained by dividing the reading reading by the resistance value (such as 100 ohms).

Use the DC current function of the multimeter, 20mA gear (if not, choose 100mA gear), and you can directly test the sensor output. If it is a desktop digital multimeter, you can also use any sensor function to allow the instrument to directly test the physical quantity sensed by your sensor. Wiring method: red test lead to green wire, black test lead to yellow wire

The basic principle of the differential pressure transmitter is to divide a space with a sensitive element (multi-purpose bellows) into two chambers. When pressure is introduced into the two chambers, respectively, the sensor produces displacement (or a tendency to displace) under the combined action of the two pressures. This displacement is proportional to the pressure difference (differential pressure) between the two chambers. Convert this displacement into a standard signal output that can reflect the magnitude of the differential pressure.

Read more about: What Is A Differential Pressure Transmitter?

  1. Potentiometer-based calibration
    Some pressure sensors have screws for zero adjustment, span adjustment, or both. Turning these screws will adjust the low end output (zero adjustment) or the high end output (span adjustment).

Typically, these screws are located on the PCB inside the sensor body. If you want to adjust the output, you need to follow these steps:

Turn on the sensor without disconnecting the PCB output port.
Accurately apply zero and full scale pressure to the sensor. (A minimum ±0.1% full scale accuracy of applied pressure is recommended.)
Connect the sensor to appropriate power and monitoring equipment to verify the output of the pressure sensor.
Adjust the zero output first, then adjust the full scale output.
Tools such as DC power supply, multimeter, pressure comparator are required.

  1. Electromagnetic based calibration
    Instead of using potentiometers, some pressure sensors use magnets for decay. Magnet-based calibration comes in two flavors: magnet and shunt calibration (often called shunt calibration).

A small magnet is usually placed near the top or bottom of the pressure sensor to increase or decrease (respectively) the zero output of the pressure sensor. Generally speaking, the full-scale output of this type of sensor can usually only be adjusted by the factory. If you want to adjust, you need to follow the steps below:

Precisely apply zero pressure to the sensor. (We recommend a full-scale accuracy of at least ±0.1% of applied pressure.)
Connect the sensor to appropriate power and monitoring equipment to verify sensor output.
To turn down the zero output, hold the magnet perpendicular to the lower end of the device.
To turn up the zero output, hold the magnet perpendicular to the upper end of the device.
If the zero output is 0 (eg, 0 VDC, 0 mV, etc.), the magnet adjustment of the zero output can be a bit of a hassle. When the zero output is non-zero, on a 1-5 VDC sensor, the actual value is less than the zero output (0.995 VDC, 0.85 VDC), so you can tell when the value is adjusted too far and the output needs to be restored. When the zero output is 0, there is no that extra buffer below the zero output and can be adjusted to a value that can only be pulled back by the factory.

  1. Calibration with software
    It should be easy to adjust the zero and full scale outputs for sensors connected to monitoring software. For example, software that controls a 4-20 mA sensor might have a 4 mA calibration setting and a 20 mA calibration setting. In this way, software control does what shunt calibration and previous calibration techniques do: it adjusts the sensor’s output, as well as controls the device’s reading of the output.

To calibrate a software-controlled sensor, follow these steps:

Connect the sensor to the control software
Accurately apply zero and full scale pressure to the sensor. (A minimum ±0.1% full scale accuracy of applied pressure is recommended.)
Using the software, adjust the zero and full scale output calibration variables until the corresponding output from the sensor is correct.

Pressure sensors are generally divided into two-wire, three-wire, four-wire, and some five-wire systems.

The two-wire system of the pressure sensor is relatively simple, and ordinary users know how to wire it. One is connected to the positive pole of the power supply, and the other wire is connected to the negative pole of the power supply through the meter. This is the simplest.

The three-wire pressure sensor is to add a line on the basis of the two-wire system. This line is directly connected to the negative pole of the power supply, which is more troublesome.

The four-wire pressure sensor has two power input terminals. The other two are signal output terminals. Most of the four-wire systems are voltage outputs. Instead of 4~20mA output. 4~20mA is called pressure transmitter, most of which are two-wire system.

The signal output portion of the pressure sensor is not amplified. The full-scale output is only tens of millivolts. Some sensors have an internal amplifier circuit, and the full-scale output is 0~2V.

For how to connect the display meter, it depends on the range of the meter. If there is a gear suitable for the output signal, you can measure it directly. Otherwise, you need to add a signal conditioning circuit. The five-wire pressure sensor is different from the four-wire type, and there are fewer five-wire pressure sensors on the market.

Read more about: What Is 0-10V Signal Output?

Related pressure measurement solutions

Steam Pressure Transmitter

Steam pressure transmitters are widely used in the measurement and control of various high-temperature steam piping…

Cryogenic Pressure Transducers

Cryogenic pressure transducer for low temperature pressure measurement.  -196℃～+125℃、-260℃/-350c（especial）. Sino-Inst offers a variety of Pressure Sensors…

Capacitive pressure transducer

What is the capacitive pressure transducer? The capacitance pressure transmitter is a pressure measurement device, which…

Extended reading: Hydrostatic Pressure Transmitter

Sino-Inst offers over 20 air pressure transducers. A wide variety of air pressure transducer options are available to you. Such as free samples, paid samples. Sino-Instrument is a globally recognized manufacturer of air pressure transducers, located in China.

Sino-Inst sells through a mature distribution network that reaches all 30 countries worldwide. Air pressure transducer products are most popular in Europe, Southeast Asia, and Mid East. You can ensure product safety by selecting certified suppliers. With ISO9001, ISO14001 certification.

Steam Pressure Transmitter

Posted on by

Steam pressure transmitters are widely used in the measurement and control of various high-temperature steam piping systems. The monitoring of steam pipes is very important. To measure the pressure of steam pipes, have you encountered the following problems:

  • Don’t know which pressure transmitter to choose?
  • Is it good to use a high-temperature pressure transmitter to measure the pressure of the steam pipe?
  • The core of the pressure transmitter removed at the steam site. The diaphragm has been dented by the impact. Is it scrapped directly?
  • How to choose the type and what should be paid attention to when measuring the steam pipeline?
RFQ More Pressure Sensors

Steam pressure transmitter performance

  • The tested medium is widely used. It can test steam, oil, water, and pastes compatible with 316 stainless steel and 304 stainless steel. It has a certain anti-corrosion ability.
  • High accuracy, high stability, use imported original sensors. Good linearity. High temperature resistance and high stability.
  • Small size, light weight, easy to install, debug and use
  • Stainless steel fully enclosed shell, good waterproof.
  • The pressure transmitter directly senses the pressure of the measured liquid level and is not affected by the bubbling and deposition of the medium.
  • The overall performance in the industrial field is ±0.15%, so that the loop performance is optimized
  • Five-year stability ±0.15%, which can greatly reduce the cost of calibration and maintenance
  • Faster dynamic response reduces process variability
  • The introduction of technology can realize a comprehensive measurement plan
  • Local/external: zero/range adjustable

Extended Reading: Smart pressure transmitter

Related Products:

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. 
Cryogenic Pressure Transducer
High Frequency Dynamic Pressure Sensor
SI-338 Ceramic Pressure Sensor
SI-303 Low-Pressure Transducer
SI-350 Sanitary Pressure Transmitter

Extended reading: Featured Diaphragm Seal Pressure Transmitters

Steam pressure transmitter installation

  1. When wiring, pass the cable through the waterproof connector (accessory) or flexible tube and tighten the sealing nut to prevent rainwater from leaking into the transmitter housing through the cable.
  2. Prevent the pressure transmitter from contacting corrosive or overheated media;
  3. When measuring the liquid pressure, the installation position of the transmitter should avoid the impact of the liquid (water hammer phenomenon) to avoid damage to the sensor overpressure;
  4. When measuring the liquid pressure, the pressure port should be opened on the side of the processing pipeline to avoid precipitation and slag;
  5. When measuring gas pressure, the pressure tap should be opened at the top of the process pipeline. The transmitter should also be installed on the upper part of the processing pipeline. So that the accumulated liquid can be easily injected into the processing pipeline;
  6. Prevent dross from depositing in the duct;
  7. When measuring steam or other high-temperature media, a buffer tube (coil) and other condensers should be connected. The working temperature of the pressure transmitter should not exceed the limit;
  8. When freezing occurs in winter, the transmitter installed outdoors must take anti-freezing measures. Avoid volume expansion of the liquid in the pressure inlet due to icing, leading to damage to the sensor;
  9. The pressure guiding tube should be installed in a place with small temperature fluctuations;

Read more about: What is a pressure sensor and how it works? 

What should be paid attention to when measuring the pressure on the steam pipeline?

Pressure transmitters are used for steam metering and pipeline monitoring.

The temperature in the steam pipeline is generally relatively high. The low is more than one hundred degrees Celsius, and the high is two to three hundred degrees Celsius.

The start and stop of the valve will also cause the pressure in the pipeline to fluctuate.

Today we are going to talk to you about what to pay attention to when measuring the pressure of steam pipes?

When measuring the pressure of the steam pipeline, a high-temperature pressure transmitter should be selected due to the high-temperature environment.

In fact, in steam conditions, it only needs to pass through the surface bend (condensation tube). After passing through the elbow, the steam will condense into water at the elbow. Insulate the temperature, so as to achieve a good cooling effect.

The pressure transmitter after passing through the elbow on the pipeline with insulation layer is basically at room temperature. If it is not insulated, the high temperature will rise, causing the temperature of all objects above the pipeline to rise.

Advantages: The use of bends can optimize the cost, and is compatible with the product.

The material selection of a good bend is high. It is thicker and more durable than the general watch bend on the market. Good pressure resistance. The price will be slightly more expensive.

Extended Reading: FMCW Radar for High Temperature Level Sensor

The above-mentioned pressure transmitter diaphragm damage is due to the phenomenon of water hammer.

The valve suddenly opens or closes, causing the pressure in the steam pipe to fluctuate suddenly.

Especially when the valve is opened, huge pressure fluctuations will cause the pipeline to vibrate violently. Even shocking.

The pressure transmitter will also withstand huge pressure in the pipeline. In severe cases, the core may be dented or even burst.

The prevention method is to install safety valves and accumulators, and open and close the valves slowly. Install a trap at the high point of the air discharge valve at the low point.

Some pressure transmitters will be protected by dampers and baffles.

The damper is a copper piece with a 4mm outer wire and a T-shaped thin through-tube structure inside. It can prevent the medium from directly impacting the diaphragm.

The baffle is placed on the front end of the core before assembling the core. Metal plate with holes. It also prevents the medium from directly impacting the diaphragm.

In the hydraulic machinery industry, there are a lot of equipment for pressure transmitters, which are often used for pressure control.

But hydraulic machinery is very prone to pressure shock when it is working. The shock pressure will far exceed the normal pressure, causing damage to the pressure transmitter.

In this case, some pressure transmitters have internal wires and dampers in the standard pressure port. Can effectively alleviate the impact.

The hydraulic and mechanical pressures are all above 10MPa. Generally, the transmitter above 10MPa should be equipped with a damper as standard. If the pressure shock is severe, a baffle can be added to alleviate the shock.

Extended Reading: Electronic Pressure Switch for Air Compressor

Extended Reading: Up to 800°C High Temperature Pressure Sensor

You may like:

Capacitive pressure transducer

What is the capacitive pressure transducer? The capacitance pressure transmitter is a pressure measurement device, which…

Extended Reading: Digital Pressure Sensor-RS485

Sino-Inst offers over 10 Steam Pressure Transmitters. A wide variety of  Steam Pressure Transmitter options are available to you. Such as free samples, paid samples.

Sino-Inst is a globally recognized manufacturer of Steam Pressure Transmitters, located in China. Sino-Inst sells through a mature distribution network that reaches all 30 countries worldwide. Steam Pressure Transmitter products are most popular in Europe, Southeast Asia, and Mid East. You can ensure product safety by selecting certified suppliers. With ISO9001, ISO14001 certification.

How does a residential water meter work?

Posted on by

What does a residential water meter look like?

A residential water meter is a legal meter for measuring water consumption in residential communities, residential buildings, bungalows, and other places.

What are the commonly used residential water meters? In terms of functions, there are smart IC card water meters, remote water meters, and smart valve-controlled water meters. Below, we will briefly introduce these common and commonly used residential water meters!

RFQ
More meters

Residential Water Meters Types

The types of water meters can be divided by the principle of measurement. The common types are mechanic water meters, mechanical water meters equipped with electronic devices, and electronic water meters.

Read more about Everything You Need To Know About Electronic Flow Meters

Their working principles are as follows:

Measuring sensors, calculators, and indicating devices are all water meters with mechanical principles and structures. There are mainly speed water meters and volumetric water meters.

Extended reading: Industrial VS Residential inline water flow meters

Keep a mechanical water meter with a complete structure. On this basis, a water meter with an electronic device is installed. There are mainly IC card water meters and remote water meters. The measuring sensor of the mechanical sensor electronic water meter is composed of a sensor based on the principle of mechanical motion and a sensor element that can convert the mechanical motion into an electrical signal and input it into the calculator. Both the calculator and the indicating device are electronic components. Such as vortex (impeller) wheel type electronic water meter.

Extended Reading: 3 inch (3″) Water Meter

Electronic water meters are divided into mechanical sensor electronic water meters and electronic sensor electronic water meters. The measuring sensor of the electronic water meter is based on the principle of electronic or electromagnetic induction. Both the calculator and the indicating device are electronic components. Such as ultrasonic water meter, jet water meter, Coriolis water meter, and electromagnetic water meter.

Extended reading: Advantages and disadvantages of ultrasonic water meters

Read More about: Chemical Flow Meter Guide

Related Products

Extended Reading: LORA water meter

Where is the Residential water meter installed?

In order to be beautiful and save space, water meters are generally installed in their own kitchens. Some of them will be installed in the corner of the kitchen or covered by other kitchen furniture.

However, in order to facilitate the reading of the water meter, it is best to install the water meter in a conspicuous position.

If the house has a special type, it may be installed outdoors.

Extended reading:
What is the K-factor in a flow meter?
Cryogenic Flow Meters|Liquid Nitrogen-Liquid Oxygen-LNG fluids

Precautions for installation of Residential water meter

  1. If it is to install a water meter on a new pipeline. You have to rinse all the stolen goods in the pipeline first. This will prevent the water meter from slowing down or not moving in the later stage.
  2. It is better to install a filter before the water meter is installed. Before installing other instruments in the pipeline, the debris in the pipeline should be cleaned up. Avoid clogging of pipes.
  3. When installing, keep the direction on the watch case consistent with the direction of the water flow. And the place where the water meter is installed. The location should be convenient for us to read or change later. The place where the water meter is installed should not be installed in a place exposed to the sun and freezing.
  4. When the water meter is installed, the reading side should be facing up.
  5. The direction of the arrow on the water meter should be the same as the direction of the water flow in the pipe.
  6. If the water meter is installed outdoors, it must be protected against sun and frost. Because the outdoor environment is better than the indoor environment. If the water meter is exposed to the sun or cold for a long time, the service life of the water meter will be affected. If the gear of the water meter is exposed to the sun for a long time. It will cause deformation and damage. This will affect the accuracy of water meter measurement.

Extended reading: Beginner’s Guide: Variable area flow meter

You may like:

Mechanical Flow Meters

Selection Guide What is a mechanical flow meter? Mechanical flow meters are a type of…

Inline water flow meters

Featured inline water flow meters Strap on flow meter X3  External clamp-on flow sensor. Easy…

Extended Reading: Chilled Water Flow Meter

Sino-Inst offers over 30 residential water meter products.

A wide variety of residential water meter options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of residential water meter, located in China.

The top supplying country is China (Mainland), which supply 100% of the residential water meter respectively.

Sino-Inst sells through a mature distribution network that reaches all 50 states and 30 countries worldwide. residential water meter products are most popular in Domestic Market, Southeast Asia, and Mid East.

You can ensure product safety by selecting from certified suppliers, with ISO9001, ISO14001 certification.

Chilled Water Flow Meter

Posted on by

Application

What is a Chilled Water Flow Meter?

A chilled water flow meter refers to a flow meter that can be used to measure low-temperature water. Common chilled water flow meters include electromagnetic flow meters, turbine flow meters, and ultrasonic flow meters. Used in the condensing system, chiller, or HVAC.

RFQ More flow meters

Chilled Water Flow Meter Types

There is no best water flow meter, only the most suitable water flow meter. Because the application details of each pipeline are different. According to the actual measurement situation, select the most suitable flowmeter. Can save a lot of time and cost.

A magnetic Flow Meter is a flow meter that measures the flow of conductive fluids. Abbreviated as EMF, also called Electromagnetic flowmeters. It is a kind of Volumetric flow meter. A magnetic flow meter measures the velocity of conductive liquids moving through a pipe or conduit. In the wastewater treatment industry, a Magnetic Flow Meter is the best flow meter choice.

Extended reading: 2 inch Water Flow Meter

The vortex flowmeter is a volume flow meter that measures the volume flow of gas, steam, or liquid, the volume flow of standard conditions, or the mass flow of gas, steam, or liquid-based on the Karman vortex principle. When the fluid flows through the dust collector rod of the vortex flowmeter, a vortex is formed. The frequency of vortex shedding is proportional to the fluid velocity. Temperature and pressure compensation can be configured.

Turbine flowmeters are widely used in flow measurement: petroleum, organic liquids, inorganic liquids, liquefied gas, natural gas, coal gas, and cryogenic fluids. Turbine flowmeter signals can be divided into pulse signals or current signals (4-20mA). It is suitable for use with secondary display, PLC, DCS, and other computer control systems.

The ultrasonic flow meter measures the liquid flow rate quickly and effectively. There are two types of ultrasonic flowmeter technology: Doppler frequency shift and transit time.

Transit time ultrasonic flow meter is most suitable for measuring the flow of cleaning liquid. Therefore, it is the most popular type of ultrasonic meter.

Doppler ultrasonic flow meter can measure the frequency difference of sound waves reflected from bubbles or particles in the airflow. It is suitable for aerated or dirty liquids.

Featured Chilled Water Flow Meters

Magnetic Water Flow Meter
Remote Magnetic Sewage Flow Meter
Insertion Magnetic Flow Meter
Liquid Turbine Flow Meter
Turbine Insertion Flow Meter
Turbine Pulse Flow Meter
Vortex Shedding Flow Meter
Vortex Steam Flow Meter
Dual Channel Ultrasonic Water Meter
Handheld Ultrasonic Flow Meter
Insertion Ultrasonic Water Flow Meter
Ultrasonic Clamp on Flow Meter
Strap on flow meter X3
Ultrasonic Water Meter for Residential Water
In-Line Ultrasonic Flow Meter

Extended reading:
What is the K-factor in a flow meter?
Cryogenic Flow Meters|Liquid Nitrogen-Liquid Oxygen-LNG fluids

What are the limitations of electromagnetic flowmeters at low temperatures?

Electromagnetic flowmeter transmitters are bound by two aspects when measuring cryogenic media.

The transmitter output signal of the electromagnetic flowmeter is small. It is necessary to take care to prevent annoyance.

The temperature and pressure used cannot be too high. The temperature used at that time does not exceed 200°.

For those media above minus 20 degrees, the lining material of electromagnetic flowmeter is usually PTFE.

PTFE is the most stable plastic among chemical materials. However, thermal expansion and contraction are more serious, and the electrode leaks easily.

Extended reading: Ultrasonic Water Meter for Residential Water

If there is no special treatment, when it is used for the measurement of low-temperature medium, the appearance of condensation or condensation on the outer wall of the measuring tube and the transmitter will occur briefly.

The signal will be broken, the insulation resistance between the circuit and the case will decrease, or even a short circuit.

Extended reading: Insertion Ultrasonic Water Flow Meter – Designed for Agricultural Irrigation, Garden Management

Can ultrasonic flowmeter measures chilled water flow?

  1. Ultrasonic flowmeter can measure flow. The temperature does not exceed -40℃~160℃. It is required to have a full tube and a uniform medium. It can display instantaneous flow, flow velocity, accumulated flow, accumulated running time, etc.
  2. Ultrasonic calorimeter can measure heat supply, flow and temperature monitoring. Air conditioning heating and cooling capacity measurement.

When you place an order, you can specify whether it is to measure flow or heat. We will help you choose the model.

Extended reading: Industrial VS Residential inline water flow meters

How to measure the chilled water flow of the chiller?

The following is our experience sharing: Freezer chilled water flow measurement techniques. Hope it can be helpful to you.

1.Water pressure detection of the water inlet and outlet pipes of the freezer

Through the detection of the return water pressure and the outlet water pressure value. Check the water flow rate of the freezer under the pressure difference between the inlet and outlet water in the random manual of the freezer.

By referring to the corresponding table or diagram of the unit’s water flow in the manual. So as to determine whether the freezer system is normal.

And through this difference to determine which section of the water pipeline has a higher resistance value. And make corresponding rectification plans and actions.

Read more: Insertion Type Ultrasonic Flow Meter Applications

2.Detection of the return water temperature and outlet water temperature of the refrigerator (the unit needs to be in normal state)

30 minutes after starting up, check the system or chilled water system inlet and outlet thermometers through the parameters of the unit’s control system.
It can read the inlet water temperature and outlet water temperature when the unit is running. The difference must be about 4-6 degrees.

If the temperature difference between the inlet and outlet water is too large, it means that the water flow of the water system through the plate is too small. This may cause the unit to fail to operate normally or be damaged.

3.Water pump running current detection

By detecting the running current of the refrigerator water pump, it is compared with the rated current. It can be judged whether the actual water flow is larger or smaller than the rated water flow of the pump.

Comprehensive judgment together with the previous parameters. In order to get an exact test and analysis report of the chiller system.

4.Detection of the suction temperature of the compressor copper pipe (only when the refrigeration is running)

If it is 30 minutes after the refrigerating and freezer is turned on

It is detected that the suction temperature of the compressor is lower than 0 degrees. It means that the water flow in the water-side heat exchanger is not enough, which leads to a drop in the evaporation temperature and the evaporation pressure.

And cause Freon is still evaporating and absorbing heat in the suction pipe that flows from the evaporator to the compressor. Will cause the compressor suction temperature to be lower than 0 degrees.

In addition, it is necessary to eliminate the drop in evaporation pressure and evaporation temperature caused by the water temperature set point being too low.

The non-standard low water temperature unit can be considered normal as long as the compressor has a suction superheat of 6-8℃.

So under normal water flow. The suction temperature of the compressor is generally greater than 0°C. Below this value, water system problems need to be ruled out.

Frequently
Asked
Questions

Help Center

Instruments that measure the linear, nonlinear, mass or volumetric flow rate of water are collectively referred to as water flow meters.

Electromagnetic flowmeters, turbine flowmeters, ultrasonic flowmeters, vortex flowmeters, and float flowmeters are all available.

In general, electromagnetic flowmeters are commonly used flowmeters for measuring conductive water, and they are one of the products with high usage rates. Electromagnetic flowmeters can measure sewage, and are more suitable for highly corrosive media.

If it is monitoring domestic water. Then install the water meter.

If it is industrial water, use a flow meter. According to the diameter and flow range of the pipeline, you can select the appropriate flowmeter.

BTU Meters are widely used in the central air-conditioned systems using chilled water systems, for measuring the thermal energy produced or consumed.

BTU is British Thermal Unit (British thermal unit). 1 BTU is the energy required to heat 1 pound of water to 1 degree Fahrenheit, 1 BTU is about 1055 joules.

Putting it together with the hour, it means how many British thermal units of heat can be pumped out by the air conditioner per hour using the heat pump principle.

According to 1BTU=1055.05585 joules, you can calculate how many joules of heat the air conditioner can pump per hour.

Water flow meters measure and indicate the amount of water flowing through pipes. It can simply and intuitively display the water flow situation for the user. Even the instantaneous flow, cumulative flow and other information.

Extended reading: Orifice Plate Flow Meter

You may like:

Fluid Flow Meters

Fluid Flow Measurement Devices Fluid Flow Meters measure the amount of liquid, gas, or steam passing…

Inline water flow meters

Featured inline water flow meters Strap on flow meter X3  External clamp-on flow sensor. Easy to…

LPG flow meters

LPG flow meter is used for flow measurement of liquefied petroleum gas. The flow measurement of…

Sino-Inst offers over 50 Chilled Water Flow Meter for flow measurement. About 50% of these are magnetic flow meters, 40% is the turbine flow sensor, and 20% are Ultrasonic and mass flow meter.

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

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

Mechanical Flow Meters

Posted on by

Selection Guide

What is a mechanical flow meter?

Mechanical flow meters are a type of flow meters that use arrangement moving parts to measure flow. The fluid passes through a series of gears or chambers (positive displacement or PD) or through a rotating turbine or rotor. Mechanical flowmeter is different from electromagnetic and ultrasonic in principle. Mechanical flow meters easily monitor liquid flow rates for water, fuels, viscous fluids and more.

RFQ More Flow Meters

Mechanical flow meter types

There are many types of flow meters.

The electromagnetic flowmeter is based on the electromagnetic principle. When a conductive fluid flows through an electromagnetic field, the velocity of the fluid can be obtained by measuring the voltage.

Ultrasonic flow meters use the principle of ultrasonic acoustics to measure flow velocity. The mechanical flow meter is a relative concept.

Compared with other flow meters, the mechanical flowmeter relies on the rotation and displacement of mechanical parts to measure the flow rate. Common mechanical flow meters have the following categories.

Tool: Volumetric Flow Rate & Pipe Diameter to Flow Speed Calculator

A positive displacement flowmeter as a mechanical flow meter is a common type of Volumetric Flow Meter. It can measure the volume flow of high viscosity and corrosive fluids.

Volumetric flow meter working principle

The positive displacement flow meter is a flow meter that uses mechanical measuring elements to continuously divide the fluid into a single known volume, and repeatedly fill and discharge the volume of fluid to accumulate the total amount of fluid.

Read more about: positive displacement flowmeter

A Rotameter flow meter is a variable area flow meter based on float position measurement. It is suitable for liquid and gas volumetric flow measurement and control.

Rotameter flow meter working principle

When the measured fluid passes through the annulus formed by the cone and floats from the bottom to the top. The differential pressure produced at the upper and lower ends of the float forms the force for the float to rise. Until the rising force equals the weight of the float immersed in the fluid, the float will stabilize at a certain height.
The height of the float in the tapered tube and the flow rate through it correspond to each other.

Read more about Rotameter flow meter-Variable Area Flow Meters

Extended reading: Beginner’s Guide: Variable area flow meter

Turbine flow meters are velocity flow meters, also called impeller flow meters. Can be used to measure the instantaneous flow and cumulative flow of liquids and gases.

Turbine Flow Meter Working Principle

The fluid flows through the sensor housing. Because the blades of the impeller have a certain angle with the flow direction. The impulse of the fluid makes the blades have a rotational torque. After the friction torque and fluid resistance are overcome, the blades rotate. The speed is stable after the torque is balanced.
Under certain conditions, the speed is proportional to the flow rate.

Read more about Turbine Flow Meter Working Principle

Gear flow meter is a micro digital positive displacement flow meter. Can measure very small flow rates and quantify small volumes of liquid. High and low temperature resistance (-196℃-200℃).

Gear flow meter working principle

With the flow of the medium, the gears mesh and rotate. Under the action of the fluid flow, a pressure difference is formed at both ends of the instrument inlet and outlet. There is no need for power supply. A pair of gears rotate freely. The cavity between the gears is filled with liquid. Discharge and measure the number of revolutions of the gear to know the flow of liquid and liquid flowing through the instrument.

Read more about Gear flow meter for Microflow

Read more about: Beginner’s Guide: Variable area flow meter

Featured Mechanical Flow Meters

Gas Turbine Flow Meter
Liquid Turbine Flow Meter
Turbine Insertion Flow Meter
Rotameter flow meter-Variable Area Flow Meters
Pointer Type Oval Gear Flow Meter
Oval Gear-Marine Fuel Flow Meter
High Temperature Oval Gear Flow Meter – Heating oil
LCD display Oval Gear High Viscosity Flow Meter
Gear flow meter for Micro flow

Integral DP Flow Meter

Extended reading: High-Temperature Oval Gear Heating oil Flow Meter

Of course, if you are not clear about the principle and difference of the above flow meters. Can not choose the appropriate Mechanical Flow Meters. Then, you can also choose the appropriate Mechanical Flow Meters according to the fluid conditions that need to be measured.

Extended reading:
What is the K-factor in a flow meter?
Cryogenic Flow Meters|Liquid Nitrogen-Liquid Oxygen-LNG fluids

Below are some of our experience sharing, hoping to help you find the right Mechanical Flow Meters.

Mechanical water flow meters refer to a type of flow meter suitable for clean water processes or applications. The working principle of a mechanical water flow meter is to measure the speed of water flowing through a pipe. This causes the piston or turbine to rotate. The volume flow of water is proportional to the rotation speed of the blades. Compared with electronic water flow meters, mechanical water flow meters may become clogged when the water is dirty or contains large particles. When the water flow is low, the mechanical water meter does not work well.

In most cases, we will choose an electromagnetic flowmeter to measure the flow rate of water. But if it is pure water and cannot conduct electricity, then an electromagnetic flowmeter cannot be used. You can choose a turbine flowmeter to measure.

Extended reading: 2 inch Water Flow Meter

You may like:

Extended reading: Insertion Ultrasonic Water Flow Meter – Designed for Agricultural Irrigation, Garden Management

Diesel Fuel flow meters are digital flow meters for liquid fuel consumption measurement.

Most widely used types are mechanical and digital inline fuel meters. Differential flow sensors are avilable. Like: the turbine, positive displacement (oval gear), Coriolis, and differential pressure flow meters.

Read more about: Diesel Fuel Flow Meters

Industrial Fuel Flow Meters

The oval gear flowmeter is particularly suitable for measuring high viscosity media. And it is not sensitive to changes in the viscosity of the liquid being measured.

Measurable medium:
Fuel, diesel, gasoline, heat transfer oil, hydraulic oil, kerosene, tar, petroleum, crude oil, asphalt, resin and other liquids. Especially suitable for the measurement of high viscosity liquids.

Read more about:

LCD display Oval Gear High Viscosity Flow Meter

T-series Coriolis Mass Flowmeter for High Viscosity Liquids

A mechanical gas flow meter is a precision instrument used to measure the volume of gas flowing through a pipe. It is typically used in industrial and commercial applications where accurate measurement of gas flow is critical.

Mechanical flow meters that can measure gas flow mainly include metal float flow meters and turbine gas flow meters. And orifice plate meter.

A Rotameter flow meter is a variable area flow meter based on float position measurement. It is suitable for liquid and gas volumetric flow measurement and control.

Gas turbine flow meter is a velocity flow meter that measures gas flow. For natural gas, nitrogen, and gas trade measurement.

Relatively speaking, the cost of gas turbine flow meters is higher than that of Rotameter flow meters. But the service life will be longer.

Extended reading: How does a rotameter work

Extended reading: Gas Rotameter Tips

For cryogenic fluids, such as liquid nitrogen, liquid oxygen, etc. It can reach -196 degrees Celsius.

For cryogenic fluids, we provide gear flow meters and low-temperature turbine flow meters.

You can choose the right one according to the flow range.

Read more General-purpose Flow Totalizer for Data collection and calculation

Mechanical oil flow meters are devices that measure the rate of oil flow. They are often used in industrial and commercial applications to monitor the rate of oil consumption or production.

There are several different types of mechanical oil flow meters, each designed for a specific application. The most common type of mechanical oil flow meter is the positive displacement (PD) meter. PD meters measure the volume of oil that passes through the meter by displacing a fixed amount of fluid with each revolution of the measuring chamber. This type of meter is very accurate and is often used in applications where precise measurement is critical.

Another type of mechanical oil flow meter is the turbine meter. Turbine meters measure the rate of oil flow by measuring the speed of a rotating turbine blade. Turbine meters are less accurate than PD meters but are more resistant to fouling and clogging.

Read more about: oil flow meter types

No matter which Mechanical Flow Meters you choose. The signal output by Mechanical Flow Meters, such as 4-20mA. The flow signal can be connected to a paperless recorder. Carry out multi-channel flow signal monitoring.

Extended reading: Make Ultrasonic Open Channel Flow Meter Work for You

Frequently
Asked
Questions

Help Center

Flow Metering Principals
Differential Pressure Flowmeters
Velocity Flowmeters
Positive Displacement Flowmeters
Mass Flowmeters
For Open Channel Flowmeters – weirs, flumes, submerged orifices, current meters, acoustic flow meters, and more
For different working principle, We offer different types of flow meters, like:
Differential Pressure Flow Meters
Orifice Plate
Venturi Tube
Flow Nozzles
The Sonic Nozzle – Critical (Choked) Flow Nozzle
Calorimetric Flowmeter
Ultrasonic Doppler Flowmeter
Positive Displacement Flowmeter
Variable Area Flowmeter or Rotameter
Velocity Flowmeters
Pitot Tubes
Electromagnetic Flowmeter
Turbine Flowmeter
Vortex Flow Meter
Thermal Flowmeter
Coriolis Flowmeter
Mass Flowmeters
Open Channel Flowmeters

Read more about: Flow Meter Selection Guide

Residential water meters can measure the water consumption of a household.
Industrial water meters mainly refer to water flow meters. Can measure the amount of industrial water. For example, the amount of wastewater discharged.
Extended reading: 2 inch Water Flow Meter

Digital flow meter is a flow meter with digital display and signal output. Digital flow meter refers to a flow meter with digital display and signal output.Different digital flow sensors include turbine, thermal mass, electromagnetic, ultrasonic, orifice plate, venturi. The different designs of the flowmeters have a variety of applications. With 4-20ma, RS485, or others output.
Extended reading: Hot Water Flow Meters Improve Heating-Boiler System

Mechanical flowmeters are generally equipped with pointer display heads.
The pointer indicates the instantaneous flow.
Above is a single cumulative flow, which can be reset;
Below is the total accumulated flow, which cannot be reset.

Extended Reading: Insertion Flowmeter Types

The choice between a mechanical and a digital flow meter really depends on your specific needs. Mechanical flow meters, such as positive displacement or turbine flow meters, are often more cost-effective and simpler to use. However, digital flow meters, like electromagnetic or ultrasonic ones, offer higher precision, more data output, and need less maintenance. So, if you value accuracy over cost, a digital flow meter might be the better choice.

An example of a mechanical flow meter is the turbine flow meter. In a turbine flow meter, the fluid moves a turbine in the meter, and the rate of rotation of the turbine is converted into a flow measurement. They are widely used in applications where a high degree of accuracy is not essential, such as water distribution and HVAC.

Flow meters can be broadly categorized into several types, but here are three common ones:

a. Differential Pressure Flow Meters: These measure the flow rate by introducing a constriction in the flow. This creates a pressure drop, which can be correlated with flow rate.

b. Positive Displacement Flow Meters: These measure flow by repeatedly filling and emptying compartments with the fluid to be measured.

c. Velocity Flow Meters: These measure the velocity of the flow and convert it to the flow rate. Examples include turbine, electromagnetic, and ultrasonic flow meters.

A mechanical water flow rate meter is a device that measures the rate of water flow in a pipeline. It usually employs moving parts, such as a turbine or a set of rotating gears, which move proportional to the flow of water. This movement is then translated into flow rate data.

A mechanical water flow meter works by using the flow of water to move parts of the device. For example, in a turbine flow meter, water flows through the meter, causing a turbine to spin. The rotation speed of the turbine is directly proportional to the water flow rate. In a positive displacement meter, a known volume of water is allowed to fill a chamber, and the number of times this chamber is filled and emptied represents the flow rate.

The accuracy of a mechanical water flow meter can vary based on the specific type of meter and the conditions of use. Generally, they offer moderate to high accuracy. For example, turbine flow meters usually have an accuracy within ±1% of the reading, while positive displacement meters can be even more accurate. However, mechanical meters are subject to wear and tear over time, which can impact accuracy, so regular maintenance is recommended.

Guess you like: What is Reynolds number?

More Featured Flow Measurement Solution

Flow Pressure Transducers for Fluid Pipelines

Flow Pressure Transducers are measurements of fluid pressure within a pipeline. When fluid flows through a pipe, pressure acts on the pipe wall. The medium in the pipeline can be…

Crude Oil Flow Meter

Crude Oil Flow Meter refers to a type of flow meter that can accurately monitor and measure the flow of crude oil. Crude oil is an industrial raw material with…

Non Contact Flow Meters Measure Liquid Flow

What is non contact flow meter? Non Contact Flow Meters refers to flow meters that can achieve flow measurement without contacting the fluid medium. No need to destroy the pipeline…

LORA Water Meter

LORA Water Meter is a commonly used wireless water meter/wireless flowmeter. The wireless remote water meter measures the water flow in the pipeline. The microcomputer in the water meter automatically…

Mechanical Oil Flow Meters

What is mechanical oil flow meter? Mechanical oil flow meter refers to a flowmeter that can detect the volume flow of oil inline. Most importantly, this type of flowmeter is…

Mechanical Flow Meter Selection Guide

How to choose the most suitable mechanical flowmeter for you? It is recommended to refer to the following points:

  • Identify Your Needs: Understand your application. Is it for irrigation, industrial use, or residential water supply? Different applications may have different flow rate, accuracy, and durability needs.
  • Consider the Fluid: What type of fluid are you measuring? The viscosity and corrosiveness of the fluid can affect the meter’s performance.
  • Evaluate the Flow Rate: Check the flow rate range required for your application. Mechanical flow meters like turbine and positive displacement meters have different suitable flow rate ranges.
  • Review Installation Requirements: Consider the pipe size, location, and installation orientation. Some flow meters have specific installation requirements to work optimally.
  • Check the Accuracy Level: How accurate does your measurement need to be? Choose a flow meter with an accuracy level that matches your needs.
  • Budget: Determine how much you’re willing to spend. Keep in mind that the cost of the meter itself is not the only factor – also consider the cost of installation and ongoing maintenance.
  • After-Sales Support: The manufacturer’s reputation and the quality of after-sales support can be crucial, especially for complex meters.

Remember, there’s no one-size-fits-all solution. Take the time to review these steps and make the right decision for your specific application. Happy flow meter shopping!

Mechanical flow meter price

Sino-Inst offers Mechanical Flow Meters with best price. Please contact our sale engineer for quotation.

Sino-Inst offers over 50 Mechanical Flow Meters for flow measurement. About 50% of these are differential pressure flow meters, 40% is the turbine flow sensor, and 20% are dp flow meters and gear flow meters.

A wide variety of Mechanical Flow Meters options are available to you, such as free samples, paid samples.

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

Rotameter flow meter-Variable Area Flow Meters

Posted on by

What is a rotameter flow meter?

A Rotameter flow meter is a variable area flow meter based on float position measurement. It is suitable for liquid and gas volumetric flow measurement and control.

RFQ More Flow meters

The LZ series Rotameter Flowmeter provided by Sino-Inst adopts a 304/316 stainless steel structure. It can be used to measure the flow of liquid, gas, and steam. Especially suitable for low flow velocity and small flow. Flow measurement of high temperature, high pressure, strong corrosion, conductive or non-conductive media.

Rotameter Flow meter Features

LZ series metal Rotameter Flowmeter (also known as metal Variable Area Flow Meters) is divided into two series, LZH and LZ. It has the characteristics of simple structure, reliable operation, wide application range, high precision, and convenient installation.

This series of flowmeters is compared with glass rotor flowmeters. It has the characteristics of high-pressure resistance, high temperature, a strong sense of safety, and concise readings.

It can also be used for flow measurement of opaque and corrosive media. The pipe body and flange of the instrument are made of stainless steel (1Cr18Ni9Ti or OCr18Ni12Ho2Ti).

Extended reading: How does a rotameter work

LZH series: Conventional orifice plates and floats are made of stainless steel. Anticorrosive orifice plate floats and tubes inner linings are made of PTFE.

LZ series: The float and tapered tube are made of stainless steel, and this series is non-corrosive.

The LZH series consists of an instrument tube, a standard orifice plate, a cone float, and a magnetic converter;
The LZ series consists of an instrument tube, a standard float, a tapered tube, and a magnetic converter.

The working parameters of this series of meters and their conversion and correction are provided by the meter calculation software to provide standard calculation methods. The meter’s measurement accuracy is guaranteed.

Extended reading: Stainless steel flow meters|304-316 optional

Rotameter Flow meter Specifications

Type LZH series LZ series
Flow range Water 2.5~100000L/h;
Air 0.07~3000m3/h 		Water 6~100000L/h
Air 0.2~1000m3/h
Turndown ratio DN≤100mm(10:1);
DN＞100mm(5:1) 		DN<80mm(10:1)
DN≥80mm(5:1)
Precision Standard type 2.5 grade,
special order can reach 1.0 grade
Work pressure DN15, DN25, DN40, DN50: 4.0MPa.
DN80, DN100, DN150: 1.6MPa 		DN15,DN25,DN40,DN50:6.4MPa
DN25,DN40,DN50,DN80,DN100:2.5MPa
DN150:1.6MPa
Medium temperature Ordinary type H1:-40℃~100℃
High temperature type H2: -80℃-250℃
Ambient temperature Pointer type: -40℃~65℃
Intelligent type: -25℃~65℃
Connection method Flange connection (flange standard: refer to GB9115-88, JB82-59 (6.4IPa), special specifications are determined according to user requirements)
Explosion-proof grade Intrinsically safe: ExibIICT4 with safety barrier LB987S, explosion-proof certificate number GYB06884
Explosion-proof: ExdIIBT4, explosion-proof certificate number GYB071017
Protection level IP65
Viscosity DN15: ≤5mPa·s, DN25~DN150: ≤250mPa·s
Product performance standards JB/T6844-1993

Rotameter flow meter applications

The metal Rotameter flow meter is suitable for the flow measurement of small-diameter and low-velocity media. It can measure most media such as gas and liquid.

The metal Rotameter flow meter can measure the instantaneous flow and cumulative flow of gases and liquids, including corrosive acid, alkali, and salt solutions. It is especially preferred when the flow is low or when a purely mechanical or inconvenient power supply is required.

Extended reading: Metal Tube Flow Meter Applications

Rotameter flow meters are mostly vertical installation, bottom entry, and top exit type, and can also be installed horizontally. The price is higher. Let me show you a sample.

This is an explosion-proof type for measuring corrosive liquids.

This is a smart type. It can measure gas and liquid. There should be no impurities.

This one is installed horizontally to measure nitrogen. It is purely mechanical to display instantaneous flow rate.

Extended reading: Flow Totalizer F3000X for Data collection and calculation

Read More about: Digital Rotameter

Rotameter flow meter structure

A Rotameter flow meter is a variable area flow meter. It consists of measuring tube, float, indicator, process connection, and so on.

Rotameter flow meter working principle

When the measured fluid passes through the annulus formed by the cone and floats from the bottom to top.

The differential pressure produced at the upper and lower ends of the float forms the force for the float to rise.

When the rise of the float is greater than the weight of the float immersed in the fluid. The float rises.

The annulus area increases accordingly. The fluid velocity in the annulus drops immediately.

The differential pressure at the upper and lower ends of the float is reduced. The lifting force acting on the float also decreases.

Until the rising force equals the weight of the float immersed in the fluid, the float will stabilize at a certain height.

The height of the float in the tapered tube and the flow rate through it correspond to each other.

Extended Reading: What is difference between rotameter and flow meter

Advantages:

  • Cheap price.
  • Observe intuitively.
  • easy installation
  • No external power needed
  • Can Measure Liquid or Gas Flows
  • Better rangeability
  • Low cost and low-pressure drop

Disadvantages:

  • Compared with other flow meters, the accuracy is low.
  • The service life is short.
  • Maintenance is required after using for a period of time!

Read more General-purpose Flow Totalizer for Data collection and calculation

  • Installed vertically on a vibration-free pipe. The fluid flows through the meter from bottom to top.
  • When measuring dirty fluids, a filter should be installed upstream of the meter
  • If the fluid itself is pulsating, a buffer tank can be installed. If the instrument itself oscillates, a damping device can be installed.
  • The gas in the instrument must be drained of the liquid.
  • The control valve in the measurement and control system should be installed downstream of the flowmeter. When used for gas measurement, ensure that the working pressure is not less than 5 times the pressure loss of the flowmeter. In order to make the flowmeter work stably.
  • Before installing the metal rotor flowmeter, the welding slag in the pipeline should be purged. Remove the stop element from the flowmeter when installing. When using after installation, open the control valve slowly. Avoid impact damage to the flowmeter.
  • If the measurement requires a wide range of flow, the range exceeds 10 o’clock. Two floats of different shapes and weights can be placed in one instrument. Take the frivolity reading when the flow is small. After the float reaches the top, take the reading of the heavy float. The range can be expanded to 50-100.
  • Liquid meters are usually calibrated with water, and gas meters are calibrated with air. The fixed value is in the engineering standard state. If the fluid density, gas pressure, and temperature of the use conditions are inconsistent with the calibration. Make necessary conversions.

Extended reading: Gas Rotameter Tips

Read more about: Beginner’s Guide: Variable area flow meter

Related Products:

Magnetic Water Flow Meter
Remote Magnetic Sewage Flow Meter
Handheld Ultrasonic Flow Meter
Ultrasonic Clamp on Flow Meter
Liquid Turbine Flow Meter
Gas Thermal Mass Flow Meter
 Annubar Flow Meter
Integral DP Flow Meter
Precession Vortex Gas Flowmeter
Vortex Shedding Flow Meter

Industrial Oil Flow Meters

Industrial oil flow meters measure the volume or mass of oil. Can realize the mutual conversion of volume…

3 inch (3″) Water Meter

Low cost 3″ Water Meter 3″ water meter is also DN80 water meter. Easy to read. Totalizing water…

Digital air flow meters

What Is Digital Air Flow Meters? The digital air flow meter is also a digital gas flow meter…

Inline water flow meters

Featured inline water flow meters Strap on flow meter X3  External clamp-on flow sensor. Easy to install. Suitable…

Industrial CO2 flow meters

CO2 flow meters are instruments that can measure the flow of gaseous or liquid carbon dioxide. CO2 is…

Sanitary Flow Meters for Sale

Common sanitary flow meters are sanitary magnetic flow meters and sanitary turbine flow meters. Composed of 304/316 stainless…

Check more 1 Inch Flow Meters.

Rotameter flow meter price

Sino-Inst offers over 30 Rotameter flow meter products. About 50% of these are for liquids. 40% are for gas. At best price.

You can refer to the product price of the following Rotameter flow meter price:

Metal rotor flowmeter
Pipe size 1/2 inch
Medium: oxygen
FOB Price: USD 281.50/pc

A wide variety of Rotameter flow meter options are available to you, such as free samples, paid samples.

Extended Reading: Collection of Industrial Insertion Flowmeter Type

Sino-Inst is a globally recognized supplier and manufacturer of Rotameter flow meters, located in China.

The top supplying country is China (Mainland), which supply 100% of the Rotameter flow meter respectively.

Sino-Inst sells through a mature distribution network that reaches all 50 states and 30 countries worldwide. Rotameter flow meter products are most popular in Domestic Market, Southeast Asia, and Mid East.

You can ensure product safety by selecting from certified suppliers, with ISO9001, ISO14001 certification.

Emerson-Rosemount Hart 475 Field Communicator

Posted on by

475 Field Communicator, Emerson-Rosemount Hart. A small amount of stock. Original Product.

Rosemount handheld 475 Field Communicator is for debugging any product under the global HART protocol. Such as pressure transmitter. Electromagnetic Flowmeter. Vortex flowmeter. Mass flowmeter. valve. Temperature Transmitter. Regulating valve, positioner.

RFQ

The 475 Field Communicator supports HART and FOUNDATION Fieldbus devices. Allows you to configure, maintain or troubleshoot the device.

Emerson Rosemount (Rosemount, USA) Hart475 handheld communicator is a new type of 475 field communicator developed by Emerson Process Management. It is also an improved and upgraded model of the Rosemount Hart375 handheld communicator. It supports both the HART communication protocol and the foundation site Bus communication protocol. And has the characteristics of universal, reliable, portable, intrinsically safe, easy to upgrade, and so on. These features will quickly make the Rosemount 475 handheld communicator the new standard.

The HART communication handheld communicator is used to directly communicate with all popular HART smart transmitters. It is used as a multifunctional handheld communicator for the maintenance and diagnosis of HART instruments.

The use of HART communication handheld programmer can be used to complete almost all on-site instrument maintenance and debugging work. Including fault diagnosis, daily maintenance, start-up debugging, calibration, etc.

The HART communication handheld terminal is a portable terminal (universal USB interface can be connected to the PC for operation). It is used with the instrument that adopts the HART communication protocol. It can be set, changed, and displayed, and it can monitor the input/output Value and self-diagnostic result. Set constant current output and zero adjustments. And it has a HART Moden function.

It can be used in conjunction with the host computer software of various manufacturers to adjust and maintain the instrument more comprehensively. It is compatible with HART275, HART375, HART475. It can communicate with all imported and domestic instruments with 1151, 3051, EJA, ABB, and other HART protocols.

When the system starts or maintains operation, it can be used as long as the HART communicator is connected to the 4-20mA communication signal line.

Extended reading: How to calibrate HART pressure transmitters

① Rosemount 475 field communicator is the new standard of a handheld communicator. It is a new generation of communicators developed based on Rosemount 275Hart and 375Hart’s more than 20 years of application experience and the further needs of users.

② Following the successful application of the Rosemount 375HART communicator. Emerson Process Management has introduced a new type of Rosemount 475 field communicator. It supports the HART communication protocol. It also supports the Foundation Fieldbus communication protocol. It is versatile, reliable, portable, Intrinsically safe, easy to upgrade, and other features. These features will quickly make the Rosemount 475 handheld communicator the new standard.

③ At present, more than 300 equipment suppliers provide more than 1,000 HART and FF Fieldbus equipment protocols. Rosemount 475 handheld communicator supports Emerson’s PlantWeb factory management and control network technology. And it combines 20 years of providing HART users with its instruments and valves. Field experience is required for configuration and maintenance. The powerful Fieldbus branch diagnosis function of Rosemount 475 Handheld Communicator is based on Emerson’s extensive experience of thousands of Fieldbus devices worldwide.

Versatility: Rosemount 475 handheld communicator supports all HART® and FOUNDATION Fieldbus devices. In addition, there is plenty of room for your future development;

Users can upgrade on-site: Users can download the latest version of HART and FOUNDATION Fieldbus-related content from the Internet to upgrade the Rosemount 475 handheld communicator on-site.

Safety: Rosemount 475 handheld communicator is the only field operator that meets all intrinsic safety requirements. Including ATEX-compliant, CENELEC, FM, CSA, and FISCO.

Robust and reliability: This is one of the reasons why he is called a “Handheld Communicator”. Some work must also be performed on the device. The Rosemount 475 Communicator is specially designed for the harsh working conditions of the factory.

Connect with AMS interface: Rosemount 475 handheld communicator can connect with AMS device management software interface. The configuration data transmission of HART instruments and valves is carried out between the equipment management software and the handheld communicator.

  • Microprocessor: 80MHZ Hitachi Hitachi SH3
  • Interface: 3 4mm banana holes
  • Built-in memory: 32M
  • Infrared data port: maximum rate 115kbs/s, distance maximum 30cm
  • System card: 1GB or higher
  • Working environment: -10～50 degrees Celsius
  • RAM: 32M
  • Protection: IP51 (front)
  • Expansion module: 32M
  • Earthquake resistance: 1m to the concrete floor without any problem
  • Weight: about 0.9KG, including battery
  • Humidity: 0-95% (no condensation)
  • Display: 1/4VGA (240*320 pixels); color 8.9cm touch screen, automatic dimming display
  • Storage: -20～55 degrees Celsius (with battery); -20～60 degrees Celsius (without battery)
  • Keyboard: 25 keys, 4 operation keys, 12 letter keys, 4 shoulders, 4 function keys and switch keys
  • Battery: Rechargeable lithium ion battery, can be used for 20 hours, 100～240VAC charging
  • Charger: Mini DIN 6-pin socket
  • Upgrade requirements: winxp operating system CD-ROM can be connected to the internet

The most commonly used models of Rosemount HART475 Communicator are:

  • Rosemount Communicator 475HP1ENA9GM9 (basic type)
  • Rosemount Handheld Communicator 475HP1ENAUGM9 (three-year upgrade)
  • Rosemount Communicator 475HP1EKL9GM9 (explosion-proof)
  • Rosemount Communicator 475HP1EKLUGM9 (explosion-proof, three-year upgrade)
  • Rosemount Handheld Communicator 475FP1EKLUGM9 (HART+FF protocol)
ModelProduct description
475Field communicator (1)
Numbering  Protocol
HHART
FFOUNDATION fieldbus
Numbering  battery model
PRechargeable lithium battery pack
NumberingPower supply/charger
1Power supply/charger (0~24VAC, 50/60HZ, American and British European plugs)
9Excluding (2)
NumberingLanguage
EEnglish (standard)
DGerman
JJapanese
RRussian
 Numbering certified product
KLFM, CENELEC/ATEX.CSA intrinsically safe (including FISCO)
NANo certification
NumberingFacilitate upgrade (3)
UConvenient upgrade options (including unlimited system card upgrades with a 3-year period)
9Excluding
 NumberingStandard mode
GMGraphic enhancement
–Configuration management
 Numbering Bluetooth
TBluetooth function
9No Bluetooth function
Numbering–
ASpare rechargeable lithium ion (4)
SStandard rubber protective box

You may like: 475 field communicator manual

Related Products:

Paperless Recorders

What is a paperless recorder? The paperless recorder is a data logger used to record measurement…

Totalizer Flow Meters

Totalizer flow meter is also called Totalizing flow meter. It refers to the totalizing function of…

Flow Totalizer F3000X

Flow Totalizer is also called flow rate totalizer. Used with various flow meters to perform data…

Digital chart recorders

What is a digital chart recorder? Industrial digital chart recorders refers to an electronic instrument that…

Sino-Inst offer all kinds of pressure transducers, DP transmitters, magnetic flow meters, and other automated instruments, which can work with HART.

Sino-Inst offers over Emerson Hart 475 Field Communicator. Currently in stock. Please contact our sales engineer to confirm the price and delivery time.

Industrial Oil Flow Meters

Posted on by

The oil Flow Meter is very important for industrial production and trade settlement. This article mainly wants to help users find the suitable industrial Oil Flow Meter effectively.

LEARN MORE

Industrial oil flow meters measure the volume or mass of oil. Can realize the mutual conversion of volume and mass.

The main industrial oils are hydraulic oil. Gear Oil. Turbine oil. Compressor oil. Refrigeration oil. Transformer oil. Cylinder oil, heat treatment oil, heat transfer oil, etc. Of course, edible oil can also be produced in the industry. In addition, there are greases with lubricating oil as base oil and thickening agent.

Therefore, whether it is a company that uses, trades, or produces oil, it needs to accurately measure the oil flow.

There are many common oil flow meters, such as turbine flow meters, positive displacement flow meters, gear flow meters, mass flow meters, etc.

Then, we need to choose a suitable flow meter that meets the measurement and budget according to different working conditions.

Oil flow meter digital refers to an oil flow meter with a local digital display function. The flowmeter can be configured with local digital display, pointer display, and without local digital display. Therefore, it is determined whether the digital display function is needed according to the needs of users.

Explore Oil and Gas Flow Meters

The signal output by the flowmeter is generally a pulse signal or a 4-20mA current signal, both of which output instantaneous flow.

The flowmeter voltage signal is unstable. It is simply disturbed during long-distance transmission. The current signal is relatively stable.

The current signal is used in the transmission process, and the voltage signal (the range of voltage value) is used for detailed control in the control instrument (integrator) and DCS system.

Extended reading: Crude Oil Measurement – Radar Level Meter Measuring Vaulted Buffer Tank

The mechanical oil flow meter is a type of flow meter. The mechanical flowmeter is a purely mechanical measuring component. Such as turbine flowmeter, rotameter, etc. Relatively speaking, for example, ultrasonic flowmeters use ultrasonic principles instead of mechanical principles. So the ultrasonic flowmeter is not a mechanical flowmeter.

Oil is generally transported through pipelines. There are many ways to measure oil flow. For example, use the oil tank level difference to calculate the oil flow. Of course, the simplest and most effective way is to use a flow meter.

Although the types of oil flow meters are different, their working principles are different. However, they can all help us achieve a goal. That is to measure and monitor the flow of oil. Instantaneous flow, cumulative flow, etc.

So that we can better control production and trade.

Extended reading: What Is Hydraulic Flow Meter?

Oil flow meter types

At present, the following types of flow meters can be used to measure oil: Turbine flow meters. Gear flow meter. Vortex flowmeter. Ultrasonic flow meter. Mass flowmeter. Differential pressure flow meters.

Turbine Flow Meters

Turbine flow meters are velocity flow meters, also called impeller flow meters. Used to measure the instantaneous flow and cumulative flow of liquids and gases.

Vortex Flow Meters

Vortex flow meter, also called Vortex shedding flow meter. Vortex Flow Meter is suitable for flow measurement of steam and various liquids and gases.

Ultrasonic Flow Meters

The ultrasonic flow meter measures the liquid flow rate quickly and effectively. There are two types of ultrasonic flowmeter technology: Doppler frequency shift and transit time.

Differential Pressure Flow Meters

Differential Pressure Flow Meter is also called DP flow meter. Differential pressure flow meters use the principle of differential pressure to measure the flow of liquid, gas and steam.

Volumetric Flow Meters

Volumetric Flow Meter, as a mechanical flow meter, is also called Positive displacement flowmeter. It can measure the volume flow of high viscosity and corrosive fluids.

Mass Flow Meters

Mass flow meter directly measures the mass flow of the medium passing through the flow meter. It can also measure the density, temperature and viscosity of the medium

You can find a suitable flow meter in the appropriate type of oil flow meter according to your needs. Of course, maybe, you don’t know what type of flowmeter you should use.

Extended Reading: Fuel Flow Meters for Diesel-Marine fuel-Industrial oil

Next, we recommend suitable flow meters for some commonly used oils.

The fuel flow meter is an instrument that can monitor fuel flow. Industrial Fuel is an important energy source. For example, diesel, marine fuel, gasoline, etc.

Industrial Fuel is an important energy source for production and manufacturing. For example, diesel, marine fuel, gasoline, etc. It is very necessary to accurately measure industrial fuel. Commonly used industrial fuel flow meters, such as turbine flow meters, gear flow meters, mass flow meters, ultrasonic flow meters, etc.

If your fuel has low viscosity and good flow rate. You can first refer to the turbine flowmeter. As long as the pressure and flow range are satisfied, you can find a suitable flow meter and use the best price.

Extended reading: Flow Totalizer F3000X for Data collection and calculation

Turbine Sanitary flow meter

If you need to measure the flow of cooking oil. Such as sunflower oil. Then, the sanitary flowmeter is the first choice.

Sanitary turbine flow meters have stainless steel bodies and come standard with Tri-Clover fittings. A Sanitary flow meter is suitable for measuring liquid without impurities. It can output a pulse frequency signal. It is used to detect instantaneous flow and total integrated flow. A Sanitary flow meters can be used in food, sports drink, liquor, and other beverage industries, in preprocess applications.

Read more about: Sanitary Flow Meters-316SS,Tri clamp-Pulse- for Brewery

Vortex Shedding Flow Meter

The heat transfer oil uses a high-temperature vortex flowmeter to measure the flow rate. Can meet the measurement of high temperature. the best price.

Extended Reading: Summary Of Crude Oil Flow Measurement Options

LCD display Oval Gear High Viscosity Flow Meter

For measuring lubricating oil, the mechanical oval gear flowmeter is the first choice. Because of measuring temperature, high viscosity measurement can be met. Oil with low viscosity can be measured with a turbine flowmeter.

To measure crude oil, you can also consider the oval gear flowmeter first. If the precision is extremely high. Then you can use a mass flow meter.

Extended reading: Oil Level Measurement Solutions for the Oil & Gas Industry

There is no hydraulic oil flow meter in the strict sense. It is not accurate to say which flowmeter is a hydraulic flow meter. Which one to use depends on the specific flow measurement conditions.

For example, the hydraulic oil is also labeled, 40 #, 46 #, or other viscosity properties. Then choose a suitable flow meter according to the relevant information such as flow, pressure, viscosity, and so on.

Read more: How to Select Hydraulic flow meter for Hydraulic oil flow? 

Of course, turbine flowmeters can be considered first.

Extended Reading: Guide and Selection for Diesel Fuel Flow Meters

The heating oil flow meter is also called a heating oil flow gauge. It is a high-temperature mechanical fuel meter. A high-temperature type oval gear flow meter can be used as a heating oil flow meter. Can reach 60℃~200℃.

Read more.

If you need to measure high temperature and high pressure (-0.1MPa-32MPa) oil storage tanks, then learn about New Choice for Heating Oil Tank Level Sensor.

Extended Reading: Petroleum Flow Meter

Of course, the above are just our suggestions. If you need to choose the right flow meter. You can contact Sino-Inst sales engineers. We will provide you with the most suitable measurement solution.

You may like:

Digital Beer Flow Meters

Sino-Inst offers a variety of Digital Beer Flow Meters for flow measurement. If you have any questions, please…

LPG flow meters

LPG flow meter is used for flow measurement of liquefied petroleum gas. The flow measurement of LPG is…

Sanitary Flow Meters for Sale

Common sanitary flow meters are sanitary magnetic flow meters and sanitary turbine flow meters. Composed of 304/316 stainless…

Hydraulic Oil Flow Meters

Sino-Inst offers a variety of hydraulic oil flow Meters for flow measurement. If you have any questions, please…

Diesel Fuel Flow Meters

Diesel Fuel flow meters are digital flow meters for liquid fuel consumption measurement. Featured Inline Diesel Fuel Flow…

Sino-Inst offers over 30 Industrial Oil Flow Meters for flow measurement. About 50% of these are Turbine flow meters, 40% is the mass flow sensor, and 20% are DP flow meter.

A wide variety of Industrial Oil Flow Meters options are available to you, such as free samples, paid samples.

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