SI-1110 Wireless Pressure Transducer

Posted on June 4, 2019 by KimGuo11

Wireless Pressure Transducer is also called Wireless Pressure Transmitter. Wireless Pressure Transducer is a wireless remote transmission module added to the common pressure transmitter. Works with the receiver. Battery powered. Can realize true wireless working wireless transmission. This product has a variety of wireless transmission methods, including GPRS/LoRa/NB-IoT/ZigBee.

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

More Wireless Pressure Solultions

Features of Wireless Pressure Transducer

Wireless Pressure Transmitter SI-1110

Five-digit LCD screen, white backlight;
Waterproof design, waterproof grade ≥IP66;
GPRS/NB-iot optional, LORA protocol can be customized development;
Cast aluminum explosion-proof shell, durable, beautiful product;
The protocol is self-edited and can be customized, timely transmission and alarm;
Sending interval, the buttons can be adjusted from 1 minute to 24 hours;
Low power consumption design, 3.6V lithium battery power supply, can support more than 15000 times;
Remote parameter configuration (transmission frequency, collection frequency, alarm value, etc.) to reduce maintenance costs.

Extended Reading: Digital Pressure Sensor-RS485

Specifications of Wireless pressure transducer

Dimension of wireless pressure transducer

Power Supply	Internal Battery, 2200mAh@7.4V Lithium
Pressure medium	gas or liquid compatible to wetted stainless steel
Pressure ranges	-1…0~0.01bar…1000bar
Pressure type	gauge(G), absolute(A), sealed gauge(S)
Wireless	LoRaWANR CN470/EU868/US915/AS923Mhz,10km in view sight
Accuracy	0.5%FS
Long term stability	<0.1%FS/year
Relay output(2 relays)	220V/3A
Indicator	4 digits LCD display
Compensation temperature range	-20~+85°C
Working temperature range	-40~+125℃
Temperature coefficient of zero	0.2%FS/10℃
Temperature coefficient of span	0.2%FS/10℃
Insulation resistance	100MQ@50VDC
Electrical connection	M20×1.5 female
Material of wetted part	1Cr18Ni9Ti
Material of membrane	316L
Material of housing	cast aluminium
Process connection	M20x1.5,G1/2 or others
Overload pressure	150%FS

Read more about: Common Units Of Pressure

Wireless Gateway

Chip	SX1276
Spreading Factor	6-12
Bandwidth	7.8-500KHZ
Bitrate	0.018-37.5kbps
Sensitivity	-141dBm
Frequency Range	137-1020MHz
Emission Power	17土1 dBm
Sleep Current	1.45uA
Stand_By Current	1.8mA
Receiver Current	12.15mA
Emission Current	93mA
Max.DATA Rate	300kbps
Certification	FCC&CE,IC,TELEC

Extended reading: What is flush diaphragm?

LORA

Item	Name	Function
System Configuration	Core	ARM Cortex-A53
	Basic frequency	1.2GHZ
	RAM	1Gbytes
	Flash	4Gbytes eMMC
Communication Mode	10M/100M Internet Interface
	GPRS/3G/4G Wireless Communication
	Wireless Communication	Lora
Electric Performance	Power Supply	PoE +48V input
	Power Supply	IEEE 802.3 af/at
	Average Consumption	5W
	Peak Power	15W
	Lora output power	Type:14dBm@868MHZ
		17dBm@470MHZ
		Max:27dBm
	Lora Receive Sensitivity	-141dBm@SF12,BW=125KHZ
Inner sensor	Temperature Sensor	Temperature Sensor
User interface(Outer)	4G Antenna Interface	4G Connect to Server
User interface(Inner)	LoraWan Antenna Interface	LoraWan Connect to Sensor
	GPS Antenna Interface	Connect to the outer GPS module
	PoE Interface	10M/100M Ethernet cable connect to Server
	Micro Sim Card
	USB	USB boot, Burning or update
	Serial Com	Online debug
	LED100	System Running Indicator
	LED200	FDX-LED Mode indicator
	LED201	LNKA_LED Connection status indicator
	LED202	SPD_LED data rate indicator
	LED203	4G mode indicator
Mechanical dimension and weight	dimension	145x95x40mm
	Weight	715g
	Installation	Wall mount or Holding pole
Working Temperature	Working Temperature	-40~75℃
Working Temperature	Storage Temperature	-40~85℃

The wireless pressure transmitter has optimized the circuit design, power management, communication protocol, and realized the “micro-power consumption” design of wireless communication. Using micro-transmission power and high-sensitivity receiving strategy, it has the advantages of real-time online monitoring of battery power and so on.

The wireless pressure transmitter system is mainly composed of pressure sensor, signal processing circuit, wireless module, power management circuit, battery and antenna. On this basis, a wireless remote transmission module is added, which can form a pressure acquisition system with our intelligent wireless receiving terminal.

This system has changed the transmission mode of RS485 and 4-20mA current signal and the power supply mode of switching power supply in the past, and used 3.6V lithium battery for power supply. This simplifies the installation method and saves the cost of customer wiring. Really achieve the purpose of energy saving and environmental protection.

The wireless pressure transmitter is a high-precision, low-power radio transmission pressure detection instrument. Powered by lithium battery, IP65 waterproof cast aluminum casing. Support data recording and data supplementary transmission functions. No wiring, no external power supply required. Built-in 3.6V lithium battery.

In the field of the Internet of Things, there are various communication technologies at the same time.

Divided by the dimension of transmission distance, in the field of local area wireless network, there are BLE, Wi-Fi, ZigBee, etc., which are widely used in home, enterprise and other scenarios.

For wide-area wireless networks, there are LoRa, NB-IoT, etc., which are specially used for low-rate, low-power, and wide-coverage IoT services.

NB-IOT/Zigbee/Lora comparison

WiFi is ubiquitous in life, but we know very little about NB-IOT, Zigbee, and Lora. Sino-Inst compares the three wireless networking solutions from five aspects to help you understand these three technologies.

Transmission distance comparison

NB-IoT: Long-distance, up to ten kilometers, generally more than 10KM; NB-IoT technology improves the power spectral density, realizes wide-area coverage, and effectively solves the problem that existing wireless signals are difficult to cover.

LoRa: Long distance, up to ten kilometers, 1~2 kilometers in cities, and 20 kilometers in suburbs;

ZigBee: short distance, 10 meters to 100 meters level;

Single-network access node capacity

NB-IOT: about 200,000. Compared with traditional 2G, 3G and 4G, NB-IoT has a 50-100 times increase in uplink capacity;

LoRa: about 60,000, which is actually related to the number of gateway channels, node packet sending frequency, data packet size, etc. Generally, there are 500 to 5000;

ZigBee: more than 60,000 in theory, 200-500 in general

Battery life

NB-IOT: theoretical about 10 years / AA battery, no need to charge;

LoRa: Theoretically about 10 years/AA battery;

ZigBee: Theoretically about 2 years/AA battery;

Cost

NB-IOT: The cost of the module is less than 5 US dollars, and the future target is reduced to 1 US dollar. The low cost and low power consumption make NB-IOT more cost-effective and wider application range than other types of IoT;

LoRa: The module is about $5;

ZigBee: The module is about 1~2 US dollars;

Transmission speed

NB-IOT: theoretical 160kbp ~ 250Kbps, generally less than 100kbps in practice, limited by low-speed communication interface UART;

LoRa: 0.3~50kbps;

ZigBee: theoretical 250kps, practically less than 100kbps, limited low-speed communication interface UART;

Wireless pressure transmitters are low-power wireless transmission digital pressure transmitters that are battery powered. This product has a variety of wireless transmission methods, including GPRS/LoRa/NB-IoT/ZigBee. Users can choose the appropriate configuration according to their needs.

The wireless digital pressure transmitter of GPRS transmission, with the mature GPRS network, uploads the pipeline pressure on site to the cloud. Users can match IP addresses and other general parameters on-site or remotely.

Wireless digital pressure transmitter with LoRa transmission. Use with LoRa gateway. It has the advantages of low power consumption, long transmission distance, strong signal penetration, and self-organized network.

NB-IoT transmits wireless digital pressure transmitter. Adopt the latest NB-IoT technology. Low power consumption, high transmission efficiency, low tariff and other advantages.

Wireless digital pressure transmitter with ZigBee transmission. It is characterized by close proximity, low complexity, self-organization, low power consumption, and low data rate.

Extended reading: Use of high temperature melt pressure sensor

Applications of wireless pressure transducer

Pipeling pressure monitoring
Machinery and oil industry
Paper making, pharmaceutical
Electric power, environmental protection and food industry
metallurgical and chemical industry
6 Field or inconvenient power distribution

Extended reading: Featured Diaphragm Seal Pressure Transmitters

Wireless differential pressure sensor

Wireless differential pressure sensor is a wireless transmission type differential pressure sensor. Supporting test software, with display, curve recording, data storage and other functions. Mainly used for measuring and monitoring system of gas differential pressure. This product is a wireless product developed mainly for inconvenient wiring environment on site.

This product can also output the RS485 signal of the MODBUS communication protocol and the analog signal of 0~5VDC, which is truly a three-in-one product. It is convenient for on-site customers to use data collection systems in different fields.

Wireless differential pressure sensors are mainly used in:

Pipeline differential pressure long distance transmission
Filter network monitoring
Pipeline differential pressure monitoring
Power station operation inspection
Locomotive brake system
Thermoelectric unit
Building fire pressure monitoring
Industrial process detection and control
Laboratory pressure calibration, etc.

Extended reading: What is a pressure sensor?

Pressure transducers for sale

Diffused silicon Gauge Pressure Transmitter

Extended reading: Industrial Pressure Transmitters|Buy from the manufacturer

Wireless Pressure Transducer Price

Wireless Pressure Transducer Price will cost more than ordinary pressure transmitters.

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

The above parameters will affect the price of the pressure transmitter.
Sino-Inst, as the manufacturer of wireless pressure transmitter, offer you with the best price.

Frequently
Asked
Questions

Help Center

Wireless pressure sensors are also wireless pressure transmitters.

The wireless pressure transmitter is added with a wireless remote transmission module, which can form a pressure acquisition system with an intelligent wireless receiving terminal. Including GPRS/LoRa/NB-IoT/ZigBee multiple transmission methods are optional.

Pressure transmitters can be categorized into four main types:

Gauge Pressure Transmitter.
Absolute Transmitters.
Differential-Pressure Transmitter.
Multivariable Pressure Transmitters.

Extended Reading: Liquid pressure sensor

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

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

SI-520 Digital Pressure Sensor

Posted on June 4, 2019 by KimGuo11

Digital Pressure Sensor is particularly suitable for use in computer control systems.

Digital pressure sensors measure the relative pressure of hydraulic and pneumatic systems. Pressure transmitters provide absolute or differential analog readings over a wide measurement range. SI-520 Digital Pressure Sensor passes high-reliability digital circuit 485 and precision temperature compensation. RS485 half-duplex working mode. This protocol complies with the MODBUS communication protocol. And uses a subset of RMOD methods in the MODBUS protocol. Digital Pressure Sensor adopts 304ss seal and welding, and has compact structure. Digital Pressure Sensor has good moisture resistance and excellent media compatibility.

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

Such sensors are also commonly referred to as:RS485 pressure transmitter. MODBUS protocol transmitter. RS485 bus sensor. Digital signal pressure transmitter.

Measurement medium: weakly corrosive liquid; weakly corrosive gas.

The digital pressure sensor is a new type of RS485 digital output sensor. Compared with the transmitters that generally output analog signals on the market, it is more suitable for the signal acquisition of the majority of industrial automation users.

RS485 digital sensor has broad development prospects. It is widely used in various industrial automation environments. It involves oil pipelines, water conservancy and hydropower, railway transportation, intelligent buildings, production automation, aerospace, military industry, petrochemicals, oil wells, electricity, ships, machine tools, hydraulic machinery and many other industries.

The working principle of the digital pressure sensor is that the pressure acts directly on the diaphragm of the sensor, so that the diaphragm produces a micro-displacement proportional to the pressure of the medium. The resistance of the sensor changes, and the electronic circuit is used to detect this change. And convert the output A digital standard signal corresponding to this pressure.

Extended reading: What is an air pressure transducer?

Digital Pressure Sensor Features

RS485 communication interface or HART communication protocol (optional)
Using digital compensation and non-linear correction technology
-10 ℃ ～ 70 ℃ digital wide temperature compensation
Support networking application
Digital display (optional)
Special requirements can be customized to suit various occasions

Extended reading: Pressure indicator transmitters

Specifications of SI-520 Digital Pressure Sensor

Amount	-0.1～0，0-1,6,10～100MPa	Ambient temperature	-20～85℃
Supply voltage	24VDC(10～36VDC)	Medium temperature	-20～85～105℃-500
output signal	RS485 half duplex	Response time	＜1ms
Protocol	MODBUS protocol	Electrical Interface	Stainless steel waterproof sealed terminal
Precision	0.1%FS、 0.25%FS、0.5%FS	Threaded connection	M20 * 1.5 or according to customer requirements
Sampling rate:	10 times / second.	Overload capacity	150%
Communication speed	9600bps,n,8,1	Sealing level	IP65/68
Communication speed	9600bps,n,8,1	Stability:	≤ ± 0.15% FS / year
Serial port settings	No parity, 8-bit data, 1 stop bit.
Serial baud rate	200,240,048,009,600,000,000,000,000,000,000,000
Vibration effect	≤ ± 0.15% FS / year (mechanical vibration frequency: 20Hz ～ 1000Hz)

Extended reading: High Pressure Flow Meters for Liquids-Steam-Gas

SI-520 Digital Pressure Sensor Dimensions

Digital Pressure Sensor Applicaitons

Various liquids, gases, or vapors compatible with 304, 316L stainless steel
Static & dynamic pressure measurement
Vacuum measurement/control
Barometric pressure measurement
Fluid level measurement
Gas Flow
Medical Instrumentation
HVAC

What does 485 communication (modbus protocol) mean in a pressure transmitter?

The pressure transmitter has a common 4-20mA output and has Hart protocol. There is also 485 communication which is the modbus protocol. Today we will talk about what is 485 communication.

MCU pin outputs TTL level. TTL level means when the MCU pin outputs 0 level. In general, the voltage is 0V. When the MCU pin outputs 1 level, the voltage is 5V. Because the TTL level is generated by a signal line and a ground line. The interference signal on the signal line will be transmitted to the receiving end with the effective signal, so that the effective signal is interfered. 485 communication actually converts the TTL level from the MCU through a converter chip in the hardware layer.

485 communication features:

RS-485 electrical characteristics:
Logic “1” is represented by the voltage difference between the two lines being + (2-6) V. Logic “0” is represented by the voltage difference between the two lines being-(2-6) V. The interface signal level is lower than that of RS-232-C, so it is not easy to damage the chip of the interface circuit. And this level is compatible with TTL level, which can be easily connected to TTL circuits.
The maximum data transmission rate of RS-485 is 10Mbps.
The RS-485 interface is strong, which means it has good anti-noise interference.
The standard value of the maximum transmission distance of the RS-485 interface is 4000 feet, in fact it can reach 3000 meters (theoretical data, in actual operation, the limit distance is only about 1200 meters). In addition, the RS-232-C interface allows only one transceiver to be connected on the bus, that is, a single station capability. The RS-485 interface allows up to 128 transceivers on the bus. That is to say, it has multi-station capability, so that users can easily set up a device network using a single RS-485 interface.

RS485 disadvantages:

RS485 bus is a conventional communication bus. It cannot do automatic arbitration of the bus. That is, data cannot be sent simultaneously to avoid bus contention. Therefore, the communication efficiency of the entire system is necessarily low, and the amount of data redundancy is large. RS485 bus is not suitable for application places with high speed requirements. At the same time, because there is usually only one host on the RS485 bus, this bus method is a typical centralized-decentralized control system. Once the host fails, the communication of the entire system is limited to a paralyzed state. Therefore, it is an important measure to do online backup of the host.

Extended Reading: Resistive Pressure Transducer

More Featured Digital Pressure Transmitters

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

**SIJC-1000HSM-Silicon Pressure Sensor**

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

**High Frequency Dynamic Pressure Sensor**

**Hygienic / Sanitary Pressure Transmitter**

**High-Temperature Pressure Transmitter**

**Remote Diaphragm Seal Pressure Transmitter**

Hydrostatic pressure transmitter

**SI-350 Sanitary Pressure Transmitter**

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Differential Pressure Transmitter Installation Guide

Use Differential Pressure Transmitter to Measure Liquid Level

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A pressure sensor is a device or device that can sense a pressure signal. And convert the pressure signal into a usable output electrical signal according to a certain rule.
A pressure sensor usually consists of a pressure-sensitive element and a signal processing unit. According to different test pressure types, pressure sensors can be divided into gauge pressure sensors, differential pressure sensors and absolute pressure sensors.
More: Industrial Pressure Sensors

A gauge pressure (GP) transmitter, compares a process pressure against local ambient air pressure.

Gauge pressure transmitters have ports to sample the ambient air pressure in real-time.
Today’s highly accurate gauge pressure transmitters can be affected by fluctuations in the local ambient pressure.
Measurements above the ambient air pressure are represented, as a positive number, while a negative number represents measurements below ambient.
A gauge pressure measurement is indicated by the letter ‘g’ following the unit of measure of the reading (i.e., inH₂O(g) or psig).
More: Gauge Pressure Transmitter

Pressure sensor is a commonly used pressure instrument, which has certain applications in many industries. It is very important for the user to determine how to detect the pressure sensor when using the pressure sensor. According to the purpose of detecting the pressure sensor, the detection items are different, of course, the detection methods will be different. Today, I will mainly introduce the three detection methods commonly used by pressure sensors. I hope they can help everyone.
Pressurization test. The checklist method is to supply power to the sensor. Blow the air holes of the pressure sensor with your mouth. Use the voltage range of the multimeter to detect the voltage change at the output of the sensor. If the relative sensitivity of the pressure sensor is large, this amount of change will be significant. If nothing has changed, you need to use a pneumatic source instead.

Through the above methods, the condition of a sensor can be basically detected. If you need accurate detection, you need to use a standard pressure source to pressure the sensor. Calibrate the sensor according to the pressure and the amount of change in the output signal. When conditions permit, temperature detection of relevant parameters is performed.
Detection of zero point. Use the voltage range of the multimeter to detect the zero point output of the sensor when no pressure is applied. This output is generally a mV level voltage. If it exceeds the sensor’s technical indicators, it means that the zero deviation of the sensor is out of range.
The detection of the bridge circuit. The main test circuit of the sensor is correct. Generally, it is a Wheatstone full bridge circuit. The ohm range of the multimeter is used. The impedance between the input terminal and the impedance between the output terminal. These two impedances It is the input and output impedance of the pressure sensor. If the impedance is infinite, the bridge is disconnected, indicating that there is a problem with the sensor or that the pin definition is not judged correctly.
Extended reading: What is a pressure sensor?

Frequently
Asked
Questions

Help Center

The working principle of the digital pressure sensor is that the pressure directly acts on the diaphragm of the sensor. The diaphragm generates a micro-displacement that is proportional to the pressure of the medium. The resistance of the sensor changes. This change is detected by electronic circuits. The output is converted to correspond to this Digital standard signal of pressure.
More about: How does a pressure transmitter work?

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 sensor based on this:

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

More about Industrial Pressure Sensors

In fact, the pressure sensor can do both digital and analog signal output.
When you order a pressure sensor, you need to confirm with the manufacturer: Do you need a local digital display? What kind of signal output is required, etc. General pressure sensors support 4-20mA, 0-5V, 0-10V and other signal outputs. Or RS485, HART and other protocols.

Extended reading: extrusion melt pressure transducer

Digital pressure switches are mainly based on electronic pressure transmitters. This provides the switch with the complete functionality of a transmitter. Simple control tasks can be performed using the integrated pressure switch. The switching points can be set individually using the digital display or an I/O link.

Extended reading: Miniature Pressure Switch

A gauge pressure (GP) transmitter, compares a process pressure against local ambient air pressure.
Gauge pressure transmitters have ports to sample the ambient air pressure in real-time.
Today’s highly accurate gauge pressure transmitters can be affected by fluctuations in the local ambient pressure.
Measurements above the ambient air pressure are represented, as a positive number, while a negative number represents measurements below ambient.
A gauge pressure measurement is indicated by the letter ‘g’ following the unit of measure of the reading (i.e., inH₂O(g) or psig).
More: Gauge Pressure Transmitter

Extended Reading: MEMS Pressure Sensors

Sino-Inst offers over 20 Digital Pressure Sensors. A wide variety of Digital Pressure Sensors options are available to you. Such as free samples, paid samples. Sino-Inst is a globally recognized manufacturer of Digital Pressure Sensors, located in China.

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

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KimGuo11

drurylandetheatre.com

SI3151 Level TRANSMITTERS Direct Mounted Flange Type

Posted on June 4, 2019 by KimGuo11

Sino-Instrument > level transmitter > Hydrostatic for Liquids

High-performance level measurement using a differential pressure transmitter.

High-reliability micro-capacitance silicon cell
All welded construction with no flange ‘O’ rings
Exceptional resistance to harsh environments
Electronic linearisation to correct tank shape
Hart® 5.2 multi-drop communication
Versatile indicator with 5-digit display
Field repair possible with common spare parts
The built-in loop calibration facility
Wide range of flange types
Large installed base

Most DP type level transmitters use an ‘O’ ring seal,

which will perish within 6 to 12 months usage in a hostile process environment.

The FCX series transmitter uses an all-welded construction with fill fluid,

that has been subjected to high vacuum for an extended period to remove entrained air.

This provides long term reliability not found in any level transmitter of its type.

Each application is different. Please feel free to get in touch to discuss your requirements.

Data sheet:

https://www.drurylandetheatre.com/SI/SMT3151TLT Direct-mounted level (pressure) transmitter.pdf

Request a Quote

KimGuo11

drurylandetheatre.com

SI-EP489 Explosion Proof Pressure Transmitter

Posted on June 3, 2019 by KimGuo11

Explosion Proof Pressure transmitter refers to a pressure sensor with explosion-proof or intrinsically safe housing. Suitable for hazardous and explosive areas.

Explosion Proof Pressure transmitter, or explosion-proof pressure transducer, with the explosion-proof enclosure. For applications in hazardous areas. Class I, Division 1. Flameproof ExdIIBT5Gb; Intrinsically safe ExiaIICT4/T5/T6Ga.
SIEP489 has flexible pressure calibration, push-button configuration, and programmable using HART® Communication. All our electronic pressure transducers can be offered with Explosion-proof. Select explosion-proof pressure transmitters with Ex d certification and 4-20mA output signals for installation.

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

More Pressure Transmitters

Features of Explosion Proof Pressure Transmitter

FM approved as “explosion-proof” for class I, div. 1 hazardous areas
Available with EXD approval “flameproof enclosure” for II 2 G Ex d II C
Current or voltage output
Designed for harsh ambient conditions
Low-power version available as an option

Specifications of SIEP489 explosion-proof pressure transmitter:

Standard range
Pressure type	Gauge pressure, absolute pressure, sealing pressure
Pressure range (bar)	1 1.6 2.5 4 6 10 16 25 40 60 100 160 200 250 300 400 500 600 750 1000 1500
Pressure range (psi)	15 30 50 75 100 200 300 500 750 1K 1.5K 3K 5K 10K 12K 15K 25K

Technical Specifications
Accuracy	±0.3 %FS ±0.5 %FS
Long-term stability (1 year)	±0.25 %FS
Response frequency (-3DB)	3.2kHz
Temperature compensation	-20~+85℃
Storage temperature	-40~+125℃
Load Resistance	Voltage output: RL ＞ 100KΩ, current output: RL≤ (supply voltage-9V) / 20mA
Overload pressure	150% FS (Range ＜ 6Bar) 300% FS (Range≥6Bar)
Destruction pressure	200% FS (Range ＜ 6Bar) 500% FS (Range≥6Bar, limit 10000Bar)
Mechanical vibration	±20g
Shock (11mS)	100g
Protection level	IP65
material	17-4PH (Range≥6Bar) 304 or 316L (Range <6Bar)
Electrical connections	Direct lead
Pressure interface	M20X1.5 G1 / 4 NPT1 / 4 (others can be customized)
Explosion-proof grade	Exd II CT6 Gb

Signal output	4~20 mA	0.5 ~ 4.5VDC (proportional output)	0.5~4.5VDC	0~5VDC	0~10VDC	RS485	RS232
Signal line specifications	2 Wire	3 Wire	3 Wire	3 Wire	3 Wire	4 Wire	4 Wire
Supply voltage	9~30VDC	5VDC	9~30VDC	9~30VDC	15~30VDC	9~30VDC	9~30VDC

Explosion proof pressure transmitter drawing

Applications of explosion proof pressure transmitter

Oil & Gas equipment needs a pressure transducer, that is reliable and able to withstand extreme environmental and pressure conditions.

Borehole monitoring
Oil Field Equipment
Refineries and petrochemical industry
Drilling platforms and pipelines
Upstream Oil and Gas Production
Natural Gas Compression and Transfer Control
Alternative Energy
Industrial and OEM Applications

We can provide maintenance, calibration and other services of the same type of products. Such as WIKA, Rosemount pressure transmitter.

Contact us now to see how we can help you with a pressure gauge solution that fits your exact needs.

Know More About Explosion proof pressure transmitter

Explosion-proof pressure transmitters are available in a wide range of specifications,
easy to install and use, safe and explosion-proof.
They can be widely used in petrochemical, electric power, metallurgy, pharmaceutical, food processing, and other industries.

Products comply with the “IEC” standard, and explosion-proof pressure transmitters are internationally renowned.

The company’s high-precision, high-stability pressure sensor components,
through high-reliability amplifier circuit and precise temperature compensation,
convert the absolute or gauge pressure of the measured medium into 4~20mA, 0~5VDC, 0~10VDC, and 1~5VDC. Such as standard electrical signals.

High-quality sensors hermetically sealed soldering technology
and a complete assembly process ensures excellent quality and performance.
The product is available in a variety of interface styles.
And a variety of lead styles to best meet customer needs.
And is suitable for use with a variety of measurement and control equipment.

Explosion proof pressure transmitter working principle

The explosion-proof pressure transmitter consists of an integrated intelligent sensor and peripheral circuits.

The sensor part is composed of a pressure sensor, a signal modulation circuit, a dedicated digital processing chip, a temperature sensor, and data memory, and the peripheral electronic circuit part is composed of an LCD display, function keys, and an EMC circuit.

The pressure signal is converted into an electrical signal by the pressure sensor. And the electrical signal is modulated. And sent to a dedicated digital processing chip for data processing.
And then converted into a 4~20 mA output signal corresponding to the pressure signal.
And the HART digital signal is superimposed on the current signal for communication.

Extended reading: How to calibrate HART pressure transmitters

Potentially explosive environment.

Such as flammable gas, dust environment, oil refinery, petrochemical plant, gas station, gas station, etc., explosive gas environment.

Under atmospheric conditions, a mixture of combustible substances in the form of gas, steam or mist, and air. After being ignited in the mixture, the combustion will spread throughout the environment of the unburned mixture.

Such as CH4, C2H2, C2H4, NH3, CO, C2H5OH, and other explosion-proof electrical equipment.

Intrinsically safe VS explosion-proof

The explosion-proof of the current pressure transmitter: mainly two forms of isolation explosion-proof and intrinsically safe explosion-proof.

Intrinsically safe explosion-proof:

“i” (Intrinsically safe electrical equipment and related equipment) Intrinsically safe circuits, circuits that cannot ignite the specified explosive gas or steam under the specified test conditions, under the specified test conditions, the electric sparks and thermal effects generated under the specified fault state . Intrinsically safe electrical equipment: All circuits are intrinsically safe electrical equipment.

Example: Intrinsic Safety: Ex ia II BT4

Flameproof:

It refers to the electrical equipment that encloses the components that can ignite the explosive mixture in a shell, and the shell can withstand the explosive pressure of the internal explosive mixture and prevent the explosion of the surrounding explosive mixture.

For example: Flameproof: Ex d II CT6

Ex(ia)ⅡC T6:

Sign	Symbol	Meaning
Explosion-proof declaration	Ex	Meet certain explosion-proof standards, such as my country’s national standards
Explosion-proof method	ia	Adopt ia-level intrinsically safe explosion-proof method, can be installed in О area
Gas category	Il c	It is allowed to involve IIC explosive gas
Temperature group	T6	The surface temperature of the instrument does not exceed 85℃

Ex（ia）ⅡC:

Sign	Symbol	Meaning
Explosion-proof declaration	Ex	Compliance with European explosion-proof standards
Explosion-proof method	ia	Adopt ia-level intrinsically safe explosion-proof method, can be installed in О area
Gas category	ll c	It is allowed to involve explosive gas of IIc

Technical Support

Explosion-proof differential pressure transmitter

Explosion-proof differential pressure transmitter is used to measure the liquid level, flow rate and pressure of liquid, gas or steam under high working pressure environment. Then converted into 4 ~ 20mA DC signal output. Intelligent type can communicate with HART Communicator.

Steam pressure transmitter

High Temperature Pressure Transducer/Transmitter for measuring pressure in hot environments. Liquids or gases up to 850 ° C. Such as steam, food processing & engine monitoring.

Application of high temperature pressure transmitter in steam pipeline.

Water pressure transmitter

Liquid level sensors also called a water pressure sensor, or water pressure transducer. SI-10 liquid pressure sensor uses waterproof device to achieve IP68 waterproof rating. Like: water pipe pressure, oil pressure for pipe or tank.SI-10 liquid pressure sensor is a piezoresistive silicon pressure sensor.

Natural gas pressure transducer

Gas pressure sensor for industrial gas pressure monitoring. Pagoda gas nozzle Φ8. Such SI-503K Pagoda Joint Gas Pressure sensor uses stainless steel as a whole. High-precision strain gage and advanced technology. It has high sensitivity, stable performance and good impact resistance.

**Flange Mounted Differential Pressure Transmitter**

**Extended Diaphragm Seal DP Level Transmitter**

**Remote Seal Differential Pressure Transmitter**

**Differential pressure(DP) level transmitter**

Sino-Inst offers over 20 Explosion Proof Pressure Transmitters. A wide variety of Pressure sensors options are available to you. Such as free samples, paid samples.

Sino-Instrument is a globally recognized manufacturer of Pressure sensors, located in China. Sino-Instrument sells through a mature distribution network that reaches all 30 countries worldwide.

Pressure sensors products are most popular in Europe, Southeast Asia, and Mid East. You can ensure product safety by selecting from certified suppliers. With ISO9001, ISO14001 certification.

Request a Quote

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KimGuo11

drurylandetheatre.com

Capacitance Level Transmitter

Posted on June 3, 2019 by KimGuo11

Continuous level measurement and point level detection in liquids and solids with capacitance probes.

Capacitance level detectorsalso known as Capacitance level transmitter, are also referred to as radio frequency (RF) or admittance level sensors. They operate in the low MHz radio frequency range, measuring admittance of an alternating current (ac) circuit that varies with level. Capacitance level sensors are a proved, as well as a cost-effective solution for level measurement, and point level detection in liquids and bulk solids. Various transmitters for continuous level measurement and switches, for point level detection are available. The measurement of the interface is also possible. The measuring principle is proven in millions of applications.

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

Request a Quote

Capacitive Level Sensing

Features of SI700 RF capacitance level transmitter

Capacitive level measurement enables measurement without blind spots over the entire sensor length

Fully insulated capacitive sensors also measure aggressive liquids

Cost-effective measurement for trouble-free and maintenance-free operation

Capacitance measurement: Measuring Principle

The principle of capacitive level measurement，

is based on the capacitance change of a capacitor.

The probe and the tank wall form a capacitor,

whose capacitance is dependent on the amount of product in the tank:

An empty tank has a lower, a filled tank a higher capacitance.

A simple capacitor consists of two electrode plate,

separated by a small thickness of an insulator,

such as solid,

liquid, gas, or vacuum.

This insulator is also called as dielectric.

Value of C depends on dielectric used,

area of the plate and also distance between the plates.

Where:

C = capacitance in picofarads (pF)

E = a constant known as the absolute permittivity of free space

K = relative dielectric constant of the insulating material

A = effective area of the conductors

d = distance between the conductors

This change in capacitance can be measured using AC bridge.

Benefits RF Capacitance Level Transmitter

Proven and tested measuring principle – robust and safe

Universally adaptable probe

Reliable operation also in strong build-up formation and viscous media

Easy commissioning

Parameters of RF Capacitance Level Transmitter

FEATURES:

Liquids and Bulk Solids
KSHIELD™ Sensing Probes and Single Setpoint
Electronics that Provide Immunity to Buildup
Integral and Remote Electronics
Easy Set Up Via External Magnet or Pushbuttons
Housing with Glass Viewing Cover
Wide Variety of Sensing Probes to (450ºF / 800 psig)
Single Point Detection
Single Touch Initialization
Element Sensitivity Down to 0.5 pF

OPTIONS:

316L SS Enclosure
External “Alarm” Indicating Lamp
Tip Extended Extensions to 60 in / 1524 mm
Pipe Extensions to 240 in / 6096 mm
Industry Standard Bulk Solids Mounting Plate
Process Connections: 3/4” NPT, 1 1/4” NPT, and Custom Flanges

Applications of
Capacitance Level Transmitter

Capacitance Level Probes are used for measuring level of:

Liquids
Powered and granular solids
Liquid metals at very high temperature
Liquefied gases at very low temperature
Corrosive materials like hydrofluoric acid
Very high-pressure industrial processes.

To the high-temperature pressure transmitter.

Sino-Instrument supplies RF Capacitance level transmitters,

is used in bulk solids, such as pellets, granules, powders, slurries,

flow / no flow, conductive products and interface.

Request a Quote

KimGuo11

drurylandetheatre.com

SIRD70 Guided Wave Radar Level Transmitters

Posted on May 31, 2019 by KimGuo11

Guided wave radar level transmitter uses guided wave radar (GWR) technology. Based on the reflection of microwave on the surface medium. Through the probe, continuous level measurement of liquid and solid levels is completed.

A guided wave radar level transmitter is also called a wave-guided radar level sensor. They can measure both levels and the interface between two media. Through probe rod or cable, complete level contact types continuous level measurement. Such as Coaxial Probe Guided Wave Radar Level Transmitter. This is different from ultrasonic level measurement, which is non-contact measurement. A guided wave radar level transmitter is often used for tank level measurement. Including liquid and solid. Output 4～20mA/HART, so as to measure and control the level during production.

Sino-Inst offers a variety of Guided wave radar Level Transmitters for industrial level measurement. If you have any questions, please contact our sales engineers.

More Level Sensors

SIRD-702 GWR Corrosive Liquid Chemical Level Sensor

SIRD-703 GWR Bulk Solids & Powder Solid Level Sensor

SIRD-704 Coaxial Probe Guided Wave Radar Level Transmitter

SIRD-705 GWR Level Sensor for High Temperature & High Pressure

We also supply level transmitters, like: Pressure Level Transmitter; Submersible Level Transmitter; and (DP) level transmitter

Features of Guided Wave Radar Level Transmitters

Using advanced microprocessors and unique echoDiscovery echo processing technology, the guided wave radar level sensor can be used in a variety of complex conditions.
A variety of process connections and types of detection components, guided wave radar level sensor for a variety of complex conditions and applications. Such as high temperature, high pressure, etc.
With the pulse working mode, the guided wave radar level meter has very low transmitting power. And can be installed in various metal and non-metal containers without harm to the human body and the environment.

Customer benefits:

Microwaves are unaffected by temperature, pressure, specific gravity and vapors
Easy to install
No moving parts
Ignores light continuous coatings
Good for vacuum service
More direct energy return – more consistent signal
Built-in waveform screen (Scope Trace)

Industries served:

Oil and gas production
Refining
Pharmaceutical and biotech
Power generation
Pulp and paper
Iron and steel
Chemicals
Food and beverage
Marine

Parameters of SIRD70 Guided wave radar level transmitters

General Parameters

Probe Material:

Rod Stainless Steel 316L/PTFE
Cable Stainless Steel 316L/PTFE
Coax Stainless Steel 316L/PTFE
Seal Viton fluororubber , Kalrez Fluorinated rubber
Process Connection Stainless Steel 316L
Shell Stainless Steel 316L, Plastic，Aluminum
Ground Terminal Stainless Steel 316L

Power: 2-Wire

Standard Version (16～26)V DC
Intrinsic Safe Version (21.6～26.4)V DC
Power Consumption max. 22.5mA
Ripple Allowed
- – <100Hz Uss < lV
- – (100～100K)Hz Uss < l0mV

Flameproof Type

(22.8 ~ 26.4) V DC 2-wire system
(198 ~242)V AC 4-wire system / 110V AC 4-wire system
Power Consumption max. 1VA，1W

Output

Output Signal (4～20)mA/HART
Resolution 1.6μA
Failure mode 20.5mA；22mA；3.9mA, hold
2-wire load resistance See the diagram below
4-wire load resistance Max.500 ohm
Integration Time ( 0～36)sec, adjustable

SIRD70 guided wave radar level transmitters

Specifications of Guided Wave Radar Level Transmitters

Max Measurement Distance	701 30m/6m（Cable /Rod） 702 20m/6m（Cable /Rod） 703 30m/6m（Cable /Rod） 704 6 m 705 15m/6m（Cable /Rod）
Measurement Interval	About 1sec (Depend on parameter settings)
Adjustment Time	About 1sec (Depend on parameter settings)
Resolution of Display	1mm
Accuracy	±10mm(See the accuracy illustration diagram below)
Temperature for Storage/Transport (-40～80) ℃	Process Temperature (Probe) 701、704 (-40～250)℃ 702 (-40～200)℃ 703 (-40～130)℃ 705 (-200～400)℃
Relative Humidity	＜95%
Pressure	Max. 40MPa
Vibration Proof	Mechanical vibration 10m/s² , (10～150)Hz

guided wave radar level transmitter data sheet

Guided Wave Radar Level Meter Download

Guided wave radar level transmitter range

Explanation：

H— Measuring range

L—Empty distance

B—The top of the blind

E—The minimum distance from the probe to the tank wall

–Blindspot is the minimum distance between the top of the highest material surface materials and the measurement reference point.

–The bottom of the blind refers to a distance near the very bottom of the cable that can not be accurately measured.

–Between the top and bottom of the blind is blind effective measure distances.

Note:

In order to ensure the accuracy of level measurement, the material should be located between the top and bottom of the blind.

Measuring Range:

The following table lists the relationship between different types of measured media and measurement distance.

Media	DK(ε)	Solid particles	Liquid	Measuring range
1	1.4~16	–	－Condensation gas, such as N2CO2	3m (only refers to the coaxial rod probe)
2	1.6~19	－Plastic with particles －White limestone, special cement -sugar	-Liquefied petroleum gas, such as propane -Solvent -Freon 12/ Freon -Palm oil	25m
3	1.9~25	－Ordinary cement, gypsum	－Mineral oil, fuel	30m
4	2.5~4	-Cereals, seeds -stone -Sand	－Benzene, styrene, toluene -Furan -Naphthalene	30m
5	4~7	-Wet stones, ores -salt	－Chlorobenzene, chloroform －Cellulose spray －Isocyanide hydrochloric acid, this amine	30m
6	>7	-mineral powder －Carbon black -coal	-Aqueous liquid -alcohol －Liquid ammonia	30m

Extended reading: Radar Level Meter for Corrosive Liquids

What is guided wave radar?

Micropower impulse radar (MIR) combines time domain reflectometry (TDR), equivalent time sampling (ETS), and modern low power circuitry.

This synthesis of technologies creates a high-speed Guided Wave Radar (GWR) transmitter.

The electromagnetic pulses are propagated via a waveguide, that focuses the energy and yields a system, many times more efficient than Non-Contact Radar (Non-contact radar level transmitters).

Time domain reflectometry (TDR)

TDR uses pulses of electromagnetic (EM) energy to measure distances or levels.
When a pulse reaches a dielectric discontinuity (such as one created by a media surface), a portion of the pulse is reflected.
The greater the dielectric difference between air and the process medium being measured, the greater the amplitude of the reflection.

Equivalent time sampling (ETS)

ETS, or Equivalent Time Sampling, is used to measure the high speed, low power EM energy.
ETS is a critical key in the application of TDR to vessel-level measurement technology.
The high-speed EM energy (1000 ft/us) is difficult to measure over short distances, and at the resolution required in the process industry.
ETS captures the EM signals in real time (nanoseconds), and reconstructs them in equivalent time (milliseconds), which is much easier to measure with today’s technology.

Guided-wave radar (GWR) level transmitter working principle

Levelflex works with high-frequency radar pulses, which are emitted and guided along with the probe.

As the pulse meets the medium surface, part of the emitted pulse is reflected due to a change of the dc value (relative dielectric constant).

The Time-of-Flight between pulse launching and receiving is measured, and analyzed by the instrument and constitutes a direct measure for the distance, between the process connection and the product surface.

Install for guided wave radar level transmitter

Waveguides can be metal rigid rods or flexible metal cables. The microwave pulse travels down the outside of the rod or cable. It is reflected on the surface of the material to be tested, and the echo is received by the antenna. The propagation distance can be calculated from the time difference between the launch and echo pulses.

Advantages:

Compared with ultrasonic and radar level gauges, the work is stable and reliable;
Like radar level gauges, the strength of the reflected signal depends on the dielectric or conductivity of the material being measured. However, the guided wave type can measure materials with lower dielectric constants.
It has a strong ability to suppress steam and foam, and the measurement is not affected;
Not affected by liquid density, looseness of solid materials, temperature, and dust during feeding;
Low maintenance, high performance, high precision, high reliability and long service life.

Disadvantages:

Double rods (cables) and coaxial tubular waveguides are easily affected by external structures due to the concentration of electric field energy;
It is easy to accumulate material between the rods (or inside the tube), resulting in false echoes and affecting the measurement effect;
The cable buried in the material will generate a large pull-down force due to the gravity of the material, causing the cable to be pulled off and other failures.

Extended reading: Features Of Magnetostrictive Level Transmitters

The microwave pulse emitted by the high frequency radar level transmitter is transmitted through the antenna, while the guided wave radar level transmitter is transmitted through the detection component.

So, is the installation standard of the guided wave radar level transmitter the same as that of the high-frequency radar level transmitter?

Today, let’s take a look at the installation standards of guided wave radar level transmitters.

Try to avoid the facilities in the tank during installation, and avoid the detection components (steel cables or steel rods) contacting internal obstacles during the measurement process, which will affect the measurement accuracy.
When installing, try to keep the detection component perpendicular to the surface of the measured medium. In this way, the microwave pulses sent out can reach the designated position, and the later data can be accurate.
During installation, the guided wave radar level transmitter should keep a certain distance from the container wall, and should be kept away from the feed and discharge ports. The feed and discharge ports have a great influence on the accuracy and stability of the guided wave radar level transmitter, so attention must be paid.
If the guided wave radar level transmitter is threaded, its length should not exceed 15mm. Generally, the length of the thread is inversely proportional to the stability of the measurement, that is, the shorter the thread, the more stable the measurement.
During installation, if the cable is too long, we need to cut off the power supply of the guided wave radar level transmitter, remove the cable, and remove the screw on the heavy hammer, and then intercept it from the bottom of the cable.
During installation, if the guided wave radar level transmitter is installed in the still-pipe, pay attention to fix the radar probe with an insulating bracket to ensure that the probe and the still-pipe are concentric, so as to avoid vibration caused by improper installation and affect the accuracy of the measurement.
When installing the guided wave radar level meter, if the connection surface of the container is made of other materials than metal, either use a metal flange to connect, or configure a metal plate.

The above are the main installation standards of the seven-point guided wave radar level transmitter summarized by Sino-Inst. In fact, the standard of guided wave radar level transmitter is far more than that.

When installing, be sure to read the manual of the self-contained product in detail. If you have any questions, you can contact the manufacturer’s engineer.

The relative permittivity of a medium is a physical quantity that characterizes the polarization of the medium.

It is determined by the properties of the medium itself.

Therefore, different media have different relative permittivity.

The dielectric constant of the measured medium directly affects the reflectivity of the high-frequency pulse signal.

When an electromagnetic pulse hits the surface of a medium, the electromagnetic wave is reflected and refracted.

The larger the relative permittivity, the smaller the reflection loss. On the contrary, the smaller the relative permittivity, the greater the transmission loss and the more serious the signal attenuation.

When the conductivity of the measured medium is greater than 10mS/cm, all of them will be reflected back. That is, the stronger the echo signal.

The signal will be extremely attenuated due to too small relative permittivity. Therefore, each guided wave radar level gauge has a minimum relative permittivity to ensure that the radar level gauge can be used normally.

Different companies’ guided wave radar liquid level transmitters have different structural designs and different requirements for minimum relative permittivity.

What is the difference between radar and ultrasonic level transmitter?

Radar liquid level sensors and ultrasonic liquid level sensors are non-contact liquid level measuring instruments. They mainly differ in the following three aspects:

Working principle

Ultrasonic level sensor
The ultrasonic level sensor uses non-touch measurement method. It is suitable for liquid level measurement in water conservancy and hydrology, chemical petroleum and sewage treatment. The probe of the ultrasonic level sensor is also called a transducer. The transducer emits ultrasonic pulses to the object to be measured. After touching the surface of the medium, the sound wave is reflected by the surface of the medium and is received by the transducer again. The time from when the sound wave is emitted to when it is absorbed and consumed after reflection will be proportional to the distance between the transducer and the medium.
Radar level sensor
Radar level sensors also use non-touch measurement methods. The measuring principle is similar to that of an ultrasonic level sensor. That is, the antenna emits electromagnetic waves, and the electromagnetic waves are reflected back after reaching the measured liquid surface. Then the antenna receives and recognizes the time distance that Baud has.

Adaptability

The time consumed by the ultrasonic storage and analysis of the sound waves in each period of the ultrasonic level sensor is slightly longer. For this reason, if the rate of liquid level change is too fast, it is generally not recommended to use an ultrasonic level sensor. In addition, the ultrasonic level sensor is sensitive to misty vapor and fine dust within the area. Therefore, ultrasonic level sensors are not suitable for high-pressure and high-temperature environments, misty spaces filled with vapor, or spaces with dust. But on the contrary, the radar level sensor can prevent the disturbance of the above-mentioned environment.

Cost performance

The market price of ultrasonic level sensors produced in China usually ranges from one thousand yuan to several thousand yuan. The appearance of its products is more delicate than that of radar level sensors, so transportation costs will be reduced accordingly. In comparison, the structural design of the radar level sensor is more messy and the measurement steps are more refined, so the price is higher. Especially when the user needs a radar level sensor with HART protocol, the unit price is more expensive. But now the price gap is not big, and it is shrinking year by year.

Through induction and comparison, it is not difficult to find that the ultrasonic level sensor and the radar level sensor have their own advantages and disadvantages. Therefore, it is recommended that users should consider many aspects when purchasing liquid level timing. It is not only necessary to meet the preset specifications, but also to scientifically include the above aspects into consideration.

Extended reading: Ultrasonic Oil Level Sensor-External Paste-Truck Fuel Tank

Maybe you still have questions like:

How to calibrate radar level transmitter?

What’s the guided wave radar level transmitter principle of operation?

You can just contact us for more information about GWR level transmitters.

Our guided wave radar (GWR) level transmitters, are made in China,

With better price, and higher quality.

Frequently
Asked
Questions

Help Center

Guided wave radar devices, also called wave-guided radar level transmitters.
Have no moving parts and require minimum maintenance.
They can measure both levels and the interface between two media.
The guided wave radar level sensor is applied to water storage tanks，
acid and alkali storage tanks, slurry storage tanks,
solid particles, and small oil storage tanks.
All kinds of conductive, non-conductive media, corrosive media.
Such as coal bunkers, ash silos, oil tanks, acid tanks, etc.

Radar level transmitters use radar technology to perform the non-contact continuous level measurement. The radar level indicator converts the level into an electrical signal. The level signal output can then be utilised by other instrumentation to monitor or control. Liquids and solids are commonly measured with this measuring technique. Like: Fly ash silo. Radar level sensors are divided into: Pulsed radar technology and frequency modulated continuous wave (FMCW) radar level sensors.
Extended reading: Radar level sensor for solids – Dust solid level measurement

The main factors affecting the price of guided wave radar level sensors are: Type of medium. Explosion-proof requirements, material and size, temperature, output signal, interface type. Connection method, etc. The reference price is 500-900USD.

Guided wave radar is a measuring instrument based on the principle of time travel. The radar wave travels at the speed of light, and the running time can be converted into a level signal by electronic components.
The instrument measures the distance from the reference point to the material surface. The probe sends out high-frequency pulses and propagates along the cable. When the pulses meet the material surface, they are reflected back and received by the receiver in the instrument. The time signal is converted into a material level signal.

GWR level transmitter is guided wave radar level transmitter. GWR level transmitter is an instrument based on guided wave radar to measure level.

Straighten the wave guide cable, place an internal obstacle with a radius of 30cm, put a vise (simulate the liquid level), and use a steel ruler with high precision to compare the error and calculate the accuracy.

The above method is not very accurate.
If possible, it can be installed on the tank, and the dipstick can be compared.

Related Products

**SIRD-901 Radar Corrosive Liquid Chemical Level Sensor**

**SIRD-902 Drop Antenna Radar Tank Level Sensor**

**SIRD-902T Microwave Radar Liquid Level Sensor**

**SIRD-904 Radar Level Gauge with Parabolic Antenna**

**SIRD-905 Horn Antenna Radar Tank Level Sensor**

**SI-FMF11 FMCW Radar Level Transmitter 120GHz**

**SI-FMF13 FMCW Radar Water Level Sensor**

**SI-FMF12 Frequency Modulated Continuous Wave Radar Level Sensor**

**Ultrasonic Oil Level Sensor-External Paste-Truck Fuel Tank**

**Differential pressure(DP) level transmitte**

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Sino-Inst offers over 10 GWR Corrosive Liquid Chemical Level Sensors for level measurement. About 50% of these are Guided Radar level meters, 40% is the tank level sensor.

A wide variety of GWR Corrosive Liquid Chemical Level Sensors options are available to you, such as free samples, paid samples.

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

Request a Quote

Please enable JavaScript in your browser to submit the form

KimGuo11

drurylandetheatre.com

SIRD-901 Radar Corrosive Liquid Chemical Level Sensor

Posted on May 31, 2019 by KimGuo11

Liquid Chemical Level Sensor is suitable for level measurement of corrosive chemicals. Pulse radar non-contact measurement. Antenna made of PTFE.

Liquid Chemical Level Sensor works for level measure and monitor of corrosive liquids for Chemical Processing. The level measurement of corrosive chemicals places extremely high demands on the sensor. Downtime must be avoided. The radar liquid level sensor wrapped in PTFE is corrosion resistant and has a long service life. The sensor has both analog and digital outputs that comply with industry standards. SIRD-901 Radar Corrosive Liquid Chemical Level Sensor is a 26GHz pulse radar level transmitter. The measuring distance can reach 10 meters. The antenna has been further optimized and is suitable for the measurement of various corrosive liquids.

Sino-Inst offers a variety of Radar Corrosive Liquid Chemical Level Sensors for industrial level measurement. If you have any questions, please contact our sales engineers.

More Radar Level Sensors

Features of SIRD-901 Radar Corrosive Liquid Chemical Level Sensor

The SIRD90 series radar sensor is a 26G Hz radar level measuring instrument, with a maximum distance of up to 80 meters.

Non-Contact Measurement
Continuous Level Measurement
Pulse Radar Measurement Range 0.254 to 15.24m (10″ to 50′)
Simple Push-Button Calibration
High measurement accuracy
Measurement is not affected by temperature, pressure or dust
User-friendly adjustment saves time

Parameters of SIRD-901 Radar Corrosive Liquid Chemical Level Sensor

Application：	All kinds of corrosive liquid
Measuring Range：	10 meters
Process Connection：	Thread G1½″A / Thread 1½″ NPT / Flange
Process Temperature：	-40℃~130℃
Process Pressure：	-0.1~0.3 MPa
Accuracy：	± 5mm
Protection Grade：	IP67
Frequency Range：	26GHz
Supply：	2-wire（DC24V）/ 4-wire（DC24V /AC220V）
Signal Output：	4… 20mA /HART （2-wire / 4-wire）RS485/ Modbus
Outer Covering：	Aluminum / Plastic / Stainless steel
Explosion-proof Grade：	ExiaⅡC T6 Ga/ Exd ⅡC T6 Gb
Antenna Material	Stainless Steel / PTFE

Applications of Radar Corrosive Liquid Chemical Level Sensor

Solid materials;
Process vessels or strong dust are easy to crystallize;
Condensation occasions
Solid Particles
Dust
Slightly corrosive liquids
Various corrosive liquids
Hygienic liquid storage containers
Strong corrosive containers

Extended reading: Radar Non Contact Water Level Sensor

Corrosive Liquid Chemical Level Sensor in Chemical Processing

Generally, in chemical plants, you will encounter liquid level measurement such as petroleum storage tanks, chemical storage tanks, chemical storage tanks, sewage treatment plants, dosing tanks, seaside, and docks.

Used to measure corrosive media such as sulfuric acid, nitric acid, hydrochloric acid, hydrofluoric acid, sodium hydroxide, and concentrated alkali.

When encountering these corrosive media, corrosive liquid level sensors are generally used. Use non-contact radar level sensors to measure corrosive liquids such as sulfuric acid, hydrochloric acid, and nitric acid.

Following the introduction of Sino-Inst, we have to consider four major principles when choosing a level gauge to measure.

Extended reading: GWR Corrosive Liquid Chemical Level Sensor

The first principle is to consider the principle of non-contact measurement and choose a non-contact liquid level sensor.

Because the probe of the liquid level sensor does not need to contact the medium. The principle of sensing band is used to obtain the current liquid level information. Such a liquid level sensor, for example, when measuring a level, a radar level gauge does not contact the measured medium, and the material used is tetrafluoroethylene. At the same time, it is a fully enclosed anticorrosive structure. Therefore, the effect is very good for liquid level measurement of viscous, corrosive, turbid and other liquids.

The second principle is to consider the convenience of installation.

Due to the uniqueness of the measurement of corrosive liquids such as sulfuric acid, hydrochloric acid, and nitric acid. It needs simple installation on site. It needs to be simple to open a hole in the tank.

Therefore, in the selection process of the level gauge, it is necessary to consider the characteristics of reliable work, easy installation, long service life, and maintenance-free.

The third principle is sensor selection.

When the radar level gauge measures corrosive media, the general manufacturer will choose the anti-corrosion type tetrafluoro material contact surface. Considering environmental factors, a physically sealed anti-corrosion probe should be selected for this occasion.

The fourth principle is the choice of the host part.

As the host part, good sealing is required. As long as there is a little medium leakage, it is possible to enter the inside of the level gauge from the housing or the wire inlet. As a result, the internal circuit board is corroded.

For corrosive gases in the environment, anticorrosive high frequency radar level gauges can be used to protect the service life of the host.

The above is Sino-Inst analyzes how to choose the level sensor for concentrated sulfuric acid and hydrochloric acid. If concentrated sulfuric acid and hydrochloric acid exceed a certain temperature range, steam or vaporization occurs. It is necessary to consider the actual situation on site and re-select the appropriate level sensor.

Extended reading: FMCW Radar Level Transmitter 120GHz

How does a Radar Corrosive Liquid Chemical Level Sensor work?

In radar level measurement, microwaves are transmitted by the antenna system of the radar sensor, to the measured product, reflected by the product surface, and received back by the antenna system.

The time from emission to reception of the signals is proportional to the level in the vessel. In continuous non-contact level measurement with radar, the sensor sends microwave signals towards the medium from above.

The surface of the medium reflects the signals back in the direction of the sensor. Using the received microwave signals, the sensor determines the distance to the product surface and calculates the level from it.

Liquids and solids are commonly measured with this measuring technique.

Extended Reading: Dielectric constant for radar level transmitter

Featured Level Sensors for Chemical Processing

**LP series Magnetostrictive Tank Level Indicator-PVDF/ PPH/ PTFE/ PFA/ PP**

**ULT-100A Ultrasonic Level Transducer**

**Portable Ultrasonic Liquid Level Indicator**

**SI-302 Anti-corrosive Submersible Level Transmitter**

Continue reading →

KimGuo11

drurylandetheatre.com

ULT-100 Ultrasonic level transmitter

Posted on May 31, 2019 by KimGuo11

Ultrasonic Level Transmitter, also called Ultrasonic level sensor, or ultrasonic level Indicator. Ultrasonic Level Transmitter provides reliable, accurate, non-contact measurement of liquid levels. Ultrasonic non-contact technology offers no moving parts to wear, jam, corrode, or get coated like contact technologies. ULT-100 Ultrasonic level transmitter is an explosion-proof product specially suitable for measuring flammable and explosive liquids.

Get a Quote

Learn About: Magnetostrictive level transmitter

Magnetostrictive level sensor

Features
Specifications
Applications

Features of ULT-100 Ultrasonic level transmitter

Provides reliable, accurate, and non-contact level measurement of compatible liquids
Non-contact technology offers no moving parts to wear, jam, corrode or get coated like contact technologies
Mapping software makes effective measuring surface only a 3″ (76.2 mm) diameter column.with no concerns of ladders, pipes, or other tank intrusions in the remaining sound cone
FM approved explosion-proof making it ideal for use in hazardous locations
Easy programming with 6 digit LCD display and simple menu structure
Output range is adjustable with choices of inputting tank dimensions. or by filling and emptying the tank. while calibrating and it automatically and scaling to levels it senses
Window cover allows easy viewing of the display
Fail-safe output options and diagnostic capabilities

Specifications of Ultrasonic Level Transmitter

Wire System	Two-wire system
Installation mode	Intergrated
Basic parameters	Maximum measuring range (High temperature, fluid)	30m

	Maximum measuring range (high temperature, moisture)	20m

	Maximum measuring range (particle > 4mm solid)	10m

	Blind area	0.25-0.5m
	measurement accuracy	±0.3%FS(Standard conditions)
	Resolution	±1mm
Input	Power supply	12~36VDC/85~265VAC
	Max electric current	>22mA
	Ripple requirement	less than ±20mA
Output	Analog signal	4-20mA
	Digital signal	RS485, HART 5.0, Modbus RTU
	Switch	4 way
Material	Transmitter	Die Casting Aluminum Alloy
	Probe	Waterproof ABS/Corrosion Resistant PTFE
	Flange	Flange standard needs to be provided by customers. Size is related to installation method.
		Various kinds of PVC, PP, PTFE, carbon steel and stainless steel flanges can also be customized.
Environment condition	Ambient temperature	-20°C~60°C. If temperature less than 20°C, LCD display will be limited.
		Outdoor instruments should be protected against ultraviolet rays if they are exposed to direct sunlight.
	Protection level	IP67
	Explosion proof level	Flamproof type ExdIICT4
		Intrinsically safe type ExiaIICT4
Process condition	Process temperature	-40℃~100℃, High temperature probe is required when exceed 70℃
	Process pressure	0.8~3bar or 0.08~0.3MPa, Below 3000m altitude.
Product characteristics	Analog and digital output can be shared
	High level of protection
	Strong anti-interference ability
	Comprehensive function

Drawings of ultrasonic level transmitter

Applications of Ultrasonic Level Transmitters

Chemical
Mining
Aggregate
Power generation
Pulp and paper
Iron and steel
Wastewater
Food and beverage
Quarries

Extended reading: The Secret of Ultrasonic Level Measurement

Extended reading: Guide to Ultrasonic Level Transmitters

Continue reading →

KimGuo11

drurylandetheatre.com

SMT3151LT Pressure Level Transmitter

Posted on May 30, 2019 by KimGuo11

Pressure level transmitter is good for level measurement. Most of the time, we use submersible hydrostatic level sensor for the level measurement. When you can not use the probe of hydrostatic level sensor, you can try with this pressure level transmitter. Pressure level transmitter, is one type of DP level measure instrument, with the diaphragm.

The liquid level (pressure/differential pressure) transmitter,

is a pressure signal, measured at the reference side of atmospheric pressure (a low-pressure side),

with one or two ports for flange (or other connection) and process pipe connection.

So, we can say that the SMT3151LT pressure level transmitter,

also is one kind of diaphragm type level transmitter.

A pressure level transmitter is an on-site transmitter, that is mounted directly on a pipe or vessel.

Since the isolating diaphragm is directly in contact with the liquid medium,

it is not necessary to take out the pressure guiding tube on the positive pressure side,

so that the liquid level (Magnetostrictive level gauge), pressure, and density of the medium,

such as high temperature, high viscosity, easy crystallization,

easy precipitation and strong corrosion can be measured,

and then It is converted to 4~20mA.DC signal output

Features of SMT3151LT Pressure level transmitter

0-2.1Mpa
-40~204℃
Flange-mounted
4-20mA, HART
316 stainless steel
Explosion-proof

RFQ NOW

Working Principle of pressure level transmitters:

On the basis of common pressure/differential pressure transmitter,

one or two isolation membrane boxes are added to measure the liquid receiving part.

Mainly used for measuring high temperature,

easy to solidify or crystallize,

containing solid suspended matter, too viscous,

corrosive or other needs to maintain sanitary conditions, non-polluting media.

The basic measurement element,

is the same as the technical performance,

and technical index of the 3151 pressure/differential pressure transmitter.

After adding the remote transmission device,

there will be a small decrease in measurement accuracy,

slow reaction speed,

and the installation position should be attended to,

when the pressure is relatively small,

so as to ensure that the measured pressure is within the measurement range,

of the basic measurement element.

In other words, a column of water of a specific height,

will always exert the same amount of pressure on a transducer.

And because weight is a force, and pressure is force applied over an area,

in this case, the area of the transducer,

we can take the pressure reading from the transducer and translate it into a level.

Extended reading: Flat Pressure Sensor for High Viscosity Fluids

What is the working principle of level transmitter?

There are many different kinds of level measurement transmitters, including:

Capacitance
Hydrostatic
Magnetic
Radar
Ultrasonic
Guided Microwave

Each of these transmitters works in different ways, making them useful for different types of processes.

Capacitance Level Transmitters:

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

Capacitance Level Transmitters:

Hydrostatic Level Transmitters::

Also known as pressure level transmitters,these transmitters help in determining fluid contents of a container,by measuring the pressure of the resting body of the fluid within it. The greater the force of liquid, the greater the volume of fluid.

Magnetic Level Transmitters:

These transmitters use a magnetic object,which is suspended in a buoyant float.This is usually in a narrow auxiliary column,to restrict lateral movements of the float.While the float is on top of the liquid,the movement of the float is measured by a different magnetic device.This allows a precise and stable fill level to be transmitted.This method is suitable for continuous measurement,owing to the tendency of the float to rise or sink based on the liquid level.

New: SI-LT Magnetostrictive level transmitter with Local Digital Display

Radar Fill Level Transmitters:

These transmitters work on the principle of radar by using radio wave emissions.These transmitters are normally mounted at the top of a tank filled with a liquid.The transmitter sends a radar signal into the liquid and receives a reflection of the signal.The transmitters then analyze the current fill level of the tank based on the time taken by the transmitted signal to return.

Ultrasonic Level Transmitters:

In this type of transmitter, an ultrasonic transducer is mounted at,or near the top of a container containing liquid.The transducer sends out an ultrasonic pulse.The pulse hits the surface of the liquid and gets reflected.The sensor then calculates the fill level based on the time between the transmitted and received signal.

Guided Microwave Level Transmitters:

These transmitters work by sending a microwave pulse,through a sensor cable or rod.The signal hits the surface of the liquid,and travels back to the sensor,and then to the transmitter housing.The electronics integrated into the transmitter housingdetermine the filling level based on the time,taken by the signal to travel down the sensor and back up again.These types of level transmitters are used in industrial applications,in all areas of process technology.

How do you use a DP transmitter for level measurement?

SMT3151LT Differential pressure(DP) level transmitter

How does a hydrostatic level transmitter work?

SI-151 Hydrostatic Level Sensor

Hydrostatic pressure for level measurement:

SMT3151TR Hydrostatic level transmitter-Rod Type

Featured Continuous level sensors

SI-U02 Multi-Point Liquid Level Float Switch

SI-U03 Float Switch Water Level Controller

SI-U04 Magnetic Float Level Sensor-Reed Switch

Pressure level transmitter manufacturer

Sino-Instrument, we are the pressure level transmitter manufacturer in China.

We supply SMT3151LT pressure level transmitters.

We offer flamges:

DN50 (2″)
DN80 (3″)
DN100 (4″)
DN40
Flush flange
Insert barrel flange

And for the material of diaphragm, we offer :

316 Stainless steel

Hastelloy C

Monel

Tantalum

Titanium

Special requirements

If you need to know more about the SMT3151LT pressure level transmitters,

you can refer to the :

SM3151LT liquid level pressure-differential pressure transmitter Download

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KimGuo11

drurylandetheatre.com

SMT3151 Remote Diaphragm Seal Pressure Transmitter

Posted on May 29, 2019 by KimGuo11

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

Remote Diaphragm seal pressure transmitter with capillary is used as a level transmitter. Diaphragm Seals also called chemical seals, are used in applications where pressure sensor requires isolation from the process media. These applications are corrosive, high temperature, clogged. Or must sanitary fluids to remain in the pipeline or container. The pressure of the liquid in the process does not affect the pressure sensor. Instead, it is applied to the remote seal. And through the capillary, hydraulic pressure is transmitted to the pressure sensor. Installing and filling the diaphragm seal, the impact on instrument performance will be minimized.

Sino-Inst also offers repair, refurbishment or replacement of used transmitters with remote seals.

More Pressure Transmitters

Features of Remote Diaphragm Seal Pressure Transmitter

Protect pressure sensor

The remote transmission diaphragm can protect the transmitter diaphragm from corrosive, aggressive or extreme temperature.

Various sealing diaphragms are available

Sino-Inst can provide a suitable sealing diaphragm according to your measurement requirements. For example, remote threaded seal, flush flanged type seals, remote flange seal-RTJ gasket surface, extended flanged seal, etc.

Suitable for special environments.

Such as:
High / low temperature fluids;
Highly corrosive / high viscosity fluids;
Toxic fluids;
The fluids containing suspended solids which are deposited in the impulse piping and may cause clogging.

Specifications of Remote Diaphragm Seal Pressure Transmitter

Measurement parameters:	pressure, liquid level
Measuring range:	lower limit: -100% URL (continuously adjustable); upper limit: to + 100% URL (continuously adjustable)
Output:	two-wire system, 4-20mADC + HART output, digital communication; output signal limit: Imin = 3.9mA, Imax = 20.5mA
Alarm current:	①Low report mode (minimum): 3.7mA ②High report mode (maximum): 21mA ③No report mode (hold): keep the effective current value before the fault ④Alarm current standard setting: high report mode
Response time:	the damping constant of the amplifier part is 0.1s; the time constant of the sensor and the remote flange is 0.2-6s, which depends on the range of the sensor, the range ratio, the length of the capillary, and the viscosity of the filling fluid The additional adjustable time constant is: 0.1-60s.
Ambient temperature:	minimum: depends on the filling liquid; maximum: 85 ℃; with liquid crystal display, fluorine rubber sealing ring is -20 ~ +65 ℃
Storage temperature / transport temperature:	minimum: depends on filling liquid; maximum: 85 ℃
Relative humidity:	0-100%
Anti-shock:	acceleration: 50kg; duration 11ms
Anti-vibration:	2g to 500Hz
Process medium temperature limit:	medium temperature: -20 ～ 400 ℃
Pressure limit of transmitter body:	vacuum to maximum pressure
Rated pressure of remote flange:	ANSI standard: 150psi-600psi; DIN standard: PN1.6MPa-PN10MPa
Warm-up time:	<15s
Explosion-proof performance:	NEPSI explosion-proof license: ExdⅡCT6; NEPSI intrinsically safe license: ExiaⅡCT4; allowable temperature is -40 ～ + 65 ℃
Power and load conditions:	① The power supply voltage is DC24V, R≤ (Us-12) / Imax kΩ, where Imax = 23mA ②Max power supply voltage: 42VDC ③Minimum power supply voltage: 12VDC, 15VDC (backlit LCD display) ④Digital communication load range: 250-600Ω
Electrical connection:	M20 × 1.5 cable sealing buckle, the terminal is suitable for 0.5-2.5mm2 wire
Process connection:	The remote flange meets ANSI standard or DIN standard. Can be installed directly, please refer to the dimension drawing for flange size
Material:	Measuring capsule: stainless steel 316L; diaphragm: stainless steel 316L, Hastelloy C, tantalum
Process connection:	stainless steel 316
Filling fluid:	silicone oil, high temperature silicone oil, ultra high temperature silicone oil, vegetable oil
Pressure transmitter shell:	aluminum alloy material, epoxy resin on the surface
Shell sealing ring:	NBR
Nameplate:	Stainless steel 304
Weight:	DN50 / 2 inches about 7-10kg; DN80 / 3 inches about 8-11kg; DN100 / 4 inches about 9-12kg
Shell protection grade:	IP67

Types of SMT3151 Remote Diaphragm Seal System Pressure Transmitters

3151T flange type remote pressure transmitter

The selection is as follows:
3151TGP4SF00S1M4B4 0~40kPa
1199FFW A50AADL03H00

On behalf of the 3151TGP base table plus an American standard 2”150LB flange type remote transmission device, the capillary length is 3 meters.

3151T flat remote pressure transmitter

The selection is as follows:
3151TGP4SF00S1M4B4 0~40kPa
1199PFWA50AADL03H00

On behalf of the 3151TGP base table plus an American standard 2”150LB flat remote transmission device, the capillary length is 3 meters.

3151T type insert barrel remote pressure transmitter

The selection is as follows:
3151TGP4SF00S1M4B4 0~40kPa
1199EFWA50AABDL03H00

On behalf of the 3151TGP base table plus an American standard 2”150LB plug-in remote transmission device, the capillary length is 3 meters, the insertion barrel length is 100mm.

3151T threaded remote pressure transmitter

The selection is as follows:
3151TGP7SF00S1M4B4 0~1000kPa
1199RTWA1AADL03H00

On behalf of the 3151TGP base table plus a threaded connection remote transmission device, capillary length of 3 meters, user connection thread specifications 1/2NPT-14.

3151T type three clamp type remote pressure transmitter

The selection is as follows:
3151TGP5SF00S1M4B4 0~100kPa
1199SCWA1A0DL03H00

On behalf of the 3151TGP base table plus a three-clamp type remote transmission device, the capillary length is 3 meters, the user connection clamp specification is 1 1/2 inch.

3151GP/DP flange type remote pressure transmitter

The selection is as follows:
3151GP4SF22S1M4B3 0~40kPa
1199FFW A50AADL03H00

On behalf of the 3151GP base table plus an American standard 2”150LB flange type remote transmission device, the capillary length is 3 meters.

3151GP/DP flat remote pressure transmitter

The selection is as follows:
3151GP4SF22S1M4B3 0~40kPa
1199PFWA50AADL03H00

On behalf of the 3151GP base table plus an American standard 2”150LB flat remote transmission device, the capillary length is 3 meters.

3151GP/DP type insert barrel remote pressure transmitter

The selection is as follows:
3151GP4SF22S1M4B3 0~40kPabr>
1199EFWA50AABDL03H00

On behalf of the 3151GP base table plus an American standard 2”150LB plug-in remote transmission device, the capillary length is 3 meters, the insertion barrel length is 100mm.

3151GP/DP type threaded remote pressure transmitter

The selection is as follows:
3151GP7SF22S1M4B3 0~1000kPa
1199RTWA1AADL03H00

On behalf of the 3151GP base table plus a threaded connection remote transmission device, capillary length of 3 meters, user connection thread specifications 1/2NPT-14 specific size,

3151GP/DP type three clamp type remote pressure transmitter

The selection is as follows:
3151TGP5SF22S1M4B3 0~100kPa
1199SCWA1A0DL03H00

On behalf of the 3151GP base table plus a three-clamp type remote transmission device, the capillary length is 3 meters, the user connection clamp specification is 1 1/2 inch.

Diaphragm Seal System

Remote Diaphragm seal pressure transmitter, is the capillary type pressure transmitter. This type pressure transmitter, assembling diaphragm seals to field transmitters for the purpose of measuring pressure, differential pressure, level, and flow.

Diaphragm seals are used to prevent process medium from entering into the pressure-sensing assembly of the Differential pressure, Gauge pressure, or Absolute pressure transmitter.

Applications which is suitable for diaphragm seal system

For measuring the liquid level, density, flow and pressure of ;
high/low-temperature fluids;
highly corrosive/high viscosity fluids ;
the fluids which may cause clogging of impulse piping in the low temperature ;
toxic fluids;
the fluids containing suspended solids, which are deposited in the impulse piping and may cause clogging.

How do diaphragm seals work?

Basically, diaphragm seals are used in all pressure measurement processes to avoid direct contact between the measuring instrument and the medium during this process. In addition, if the measuring point cannot be installed or read because the measuring point is located in a hard-to-reach location, a diaphragm seal can also be used. In both cases, the applied pressure is transferred to the measuring instrument through the system fill fluid in the diaphragm seal housing.
The diaphragm of the seal can be made of different materials, such as stainless steel, Hastelloy, Monel or tantalum. In addition, coatings with ECTFE, PFA or gold can also be used.

We can provide the best diaphragm seal design, materials, system fill fluid and accessories for each application. The combined configuration of the pressure measuring instrument and the diaphragm seal is mainly determined by the special application conditions of the diaphragm sealing system.

How does a diaphragm pressure sensor work?

When the diaphragm seal pressure transmitter is working, the high and low pressure side isolation diaphragms and the filling liquid transfer the process pressure to the center filling liquid. The filling fluid in the center transmits the pressure to the sensing diaphragm in the center of the δ-chamber sensor. The sensing diaphragm is a tensioned elastic element, and its displacement changes with the differential pressure. For GP gauge pressure transmitters, the atmospheric pressure is applied to the low-pressure side of the sensing diaphragm. AP absolute pressure transmitter, the low pressure side always maintains a reference pressure. The maximum displacement of the sensing diaphragm is 0.004 inches (0.10 mm). The displacement is proportional to the pressure. The two capacitance fixed plates of the measuring diaphragm are linearly converted into a 2-wire current, voltage or digital HART output signal of 4-20mADC by the amplifying circuit.

What is a diaphragm seal?

Diaphragm seals, also known as chemical seals or remote seals, are used for pressure measurements when the process medium should not come into contact with the pressurised parts of the measuring instrument.

A diaphragm seal has two primary tasks:

Separation of the measuring instrument from the process medium
Transfer of the pressure to the measuring instrument

Extended reading: SI-703 Flush Diaphragm Pressure Sensor

What is remote seal?

The remote seal is used to prevent the medium in the pipeline from directly entering the pressure sensor assembly in the pressure transmitter. It is connected to the transmitter by a capillary filled with fluid. As a result, they’re often used in refining, petrochemical, and chemical plants.

Applicaitons of diaphragm seal

Typical applications where a diaphragm seal provides a cost-effective solution, to protecting the pressure instrument are:

In applications where the process fluid is corrosive;

In applications where the process fluid has a high viscosity,
is comprised of slurries, sludge or other material that can actually coat,
or damage a traditional pressure measuring device;

In applications where the process fluid can freeze or polymerize,
thus causing a condition that might lead to the instrument becoming immobilized,
or incapable of transmitting an accurate pressure measurement or signal.

The process side of the seal is isolated by a flexible diaphragm. The internal space between this diaphragm and pressure measuring sensor is filled with a system fill fluid. The pressure is transmitted from the measured medium, by the elastic diaphragm into the fluid. And from there to the measuring element, i.e. to the pressure measuring instrument or the transmitter.

Often, between the diaphragm seal and pressure measuring instrument, a capillary is connected. Capillary can eliminate or to minimize temperature effects from the hot fluid to the measuring instrument.

A Remote seal is mounted to the process by threaded, flanged, in-line, sanitary, or other connections. Usually, the fittings consist of T-pieces which are integrated into a pipeline, or of welding sockets which are welded to a pipeline, the process reactor or a tank.

This diaphragm seal type offers the advantage, that the “contact surface” between pressure medium and the diaphragm is relatively large. Thus ensuring accurate pressure measurement, especially for very low pressures (< 600 mbar).

Although standard remote seal bodies and diaphragms, are made of stainless steel, a variety of materials, from carbon steel to Hastelloy® C-276, are available to meet the demand of most applications.

A remote seal from Sino-Instrument can operate in pressure applications from 10″ Hg to 20,000 psi, and media temperatures between -130°F and 752°F. We can try to Learn more about the functionality, areas of application and advantages of a diaphragm seal in the following WIKA video.

Extended reading: Flat Pressure Sensor for High Viscosity Fluids

Diaphragm type pressure transmitter

https://www.drurylandetheatre.com/diaphragm-sealed-differential-pressure-transmitters-for-sale/

SI-D100 Diaphragm Pressure Gauge

SMT3151LT Differential pressure(DP) level transmitter

Data sheet of SMT3151 Diaphragm Seal Pressure transmitters

SMT3151 Diaphragm Seal Pressure transmitter data sheet Download

Diaphragm seal pressure transmitter installation

The remote pressure transmitter without capillary can be directly installed through the remote flange. The position deviation will produce a correctable zero offset
The electronic watch case can rotate 360 degrees at the maximum. The positioning screw can fix it at any position.
Single-crystal silicon remote flange is connected with the matching flange conforming to ANSI / DIN standard. The matching flange should be equipped with soft gasket and fixed bolts and nuts. The user can choose to install bolts and nuts.
For the remote transmission pressure transmitter with capillary, if the remote transmission sealing device is lower than the transmitter body, the maximum height drop between the remote transmission sealing device and the transmitter body should be less than 5m. When the working pressure is lower than 100kPa absolute pressure, the transmitter body must be lower than the remote transmission sealing device.
The minimum bending radius of the capillary is 75mm, winding is strictly prohibited

Q&A

Parameters that determine the design of a remote seal transmitter

Location of the transmitter (indoor versus outdoor).
Temperatures (process and ambient).
Exposure to vacuum.
Pressure (operating and maximum).
Length of capillary.
Type of seal desired.
Process connection, material of construction and similar considerations.
Installation requirements.
Measurement span.

When are threaded connections used with diaphragm seals?

The combinations of diaphragm seals with threaded connection can be used for processes with extreme temperatures and with aggressive, adhesive, corrosive, environmentally hazardous or toxic media.

Why are there different system fill fluids with diaphragm seals?

In selecting the system fill fluid for diaphragm seals, factors such as compatibility (physiologically harmless) and also temperature and pressure conditions at the measurement location are of crucial importance. Depending on the system fill fluid, the appropriate minimum and maximum operating temperature range must be observed.

How are the diaphragm seals connected?

The diaphragm seals are available with female or male thread in their basic design. Due to the wide variety of available process connections they can be mounted to many different connections without any problems. Generally these connections are T-pieces which are integrated into a pipeline or welded to a pipeline by means of a welding socket.

Sino-Instrument offers SMT3151 Diaphragm Seal Pressure transmitter. Work the same as Wika diaphragm seal pressure transmitter; diaphragm seal pressure transmitter Rosemount; Yokogawa diaphragm seal pressure transmitter.

Sino-Instrument are diaphragm seal pressure transmitters manufacturer. We can offer you automated instruments from China, With best price.

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KimGuo11

drurylandetheatre.com

Features of Wireless Pressure Transducer

Specifications of Wireless pressure transducer

Wireless Gateway

LORA

wireless pressure transmitter working principle

battery powered wireless pressure transmitter

NB-IoT, LoRa, ZigBee comparison

How to choose a wireless pressure transmitter

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Wireless Pressure Transducer Price

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What is wireless pressure sensor?

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What is a pressure transmitter used for?

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Digital Pressure Sensor Features

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SI-520 Digital Pressure Sensor Dimensions

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What does 485 communication (modbus protocol) mean in a pressure transmitter?

485 communication features:

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Technical Support

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How do you test a pressure sensor?

Frequently Asked Questions

What is pressure sensor and how it works?

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Features of Explosion Proof Pressure Transmitter

Specifications of SIEP489 explosion-proof pressure transmitter:

Applications of explosion proof pressure transmitter

Know More About Explosion proof pressure transmitter

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Potentially explosive environment.

Intrinsically safe VS explosion-proof

Technical Support

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Time domain reflectometry (TDR)

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