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

Shield boring machine Pressure Sensor The measuring end adopts a specially treated strong thick metal diaphragm. Adopting the principle of mechanical transmission, the hard sand and small rock particles in the measured medium sense the pressure through the isolation diaphragm without damaging the internal sensitive components. The pressure sensor has a compact structure, corrosion resistance, vibration resistance, hard sand impact resistance, and wide range temperature compensation. Suitable for pressure measurement of mud, wet soil and other media.

Shield boring machine Pressure Sensor

Features of Shield boring machine Pressure Sensor

  • Using diaphragm isolation technology;
  • Integrated chip, wide voltage power supply;
  • High protection, compact structure and easy installation;
  • Cut-off frequency design, strong anti-interference ability, and lightning protection;
  • Current limiting, voltage limiting, reverse connection protection (current limiting output);
  • Resistant to vibration, frequent high-pressure impact, solid sand impact, and wear resistance;

Technical Parameters

Measuring medium:Mud, wet soil, etc. (compatible with contact materials)
Pressure range:0~0.6MPa (10, 16, 25, 40, 60, 100bar can be customized)
Pressure method:Gauge
Accuracy level:0.5%FS
Medium temperature:-40~85℃
Connection time:20ms
Stable performance:±0.1% FS/year
Temperature compensation: -10~70℃
Temperature drift:±0.01%FS/℃ (within temperature compensation range) ±0.05%FS/℃ (outside temperature compensation range)
Protection level:IP65
Durable performance:1X10⁶ times (number of cycles from the lower limit of the measuring range to the upper limit of the measuring range)
Overall weight:≈850g
Resolution:Analog output 0.01%FS, digital output 0.05%FS
output signal:4-20mA (two-wire system), 0-5/1-5/0-10VDC (three-wire system)
Supply voltage:24VDC(10-30VDC)

Professional Applications

Specialized Pressure Transmitter for Heavy-Duty Machinery

When you’re dealing with machinery that faces rugged environments and intense pressure conditions, such as injection machines, tunnel boring machines (TBM), brick-making machines, and earth pressure machines, you need equipment that won’t buckle under the pressure – both literally and metaphorically. Enter our specialized pressure transmitter.

Injection Machines (Grouting Machines):

In the world of grouting machines or injection machines, consistency and precision are paramount. Given the intensity of the operations, the special thick metal diaphragm of our pressure transmitter stands out as an exemplary component. Not only does it efficiently sense the pressure of hard sand particles and small rock granules in the grout, but its unique mechanical transmission principle ensures that the sensitive internal elements remain undamaged. This guarantees precision and reduces maintenance downtimes.

Tunnel Boring Machines (Shield Machines or TBMs):

Tunnel construction is a challenging feat. With TBMs, where the machinery encounters diverse geological structures and varying pressure conditions, our pressure sensor plays a pivotal role. Its ability to withstand vibrations, corrosive environments, and the aggressive impact of hard sand granules ensures continuous, real-time pressure data. This translates to safer operations and optimal machine performance in various earth compositions.

Brick-making Machines:

Consistency is the hallmark of quality in brick-making. The compact structure and wide-ranging temperature compensation of our pressure transmitter ensure that it consistently delivers accurate pressure measurements. This aids in producing bricks of uniform quality and strength, regardless of the raw materials or environmental conditions.

Earth Pressure Machines:

Earth pressure machines handle varying types of soils, each with its own set of challenges. Our sensor’s robust design, capable of enduring the corrosive nature of some soils and the abrasive nature of others, proves invaluable. The quick and accurate pressure readings it provides enable operators to adjust machine parameters for optimal performance, ensuring efficient operations and reducing wear and tear on machinery.

More Featured Pressure Sensors and Solutions

The shield machine is the core equipment in tunnel construction, and the control of its working pressure is crucial to the safety and quality of the tunnel. By controlling the working pressure of the shield machine, construction personnel can effectively control the pressure balance during tunnel construction to prevent safety accidents caused by pressure fluctuations and ensure the smooth progress of construction.

Sino-Inst supplies special pressure sensors for grouting machines, shield machines, brick making machines, soil compactors and other machinery. Can measure the pressure of mud, liquid, soil, etc. If you need to purchase, please feel free to contact our sales engineers for consultation.

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SI-51 Miniature Pressure Sensor/Transducer

Miniature Pressure Sensor is also called Miniature Pressure Transducer. The miniature pressure sensor is a miniature solid-state silicon force sensor integrated with MEMS technology. One-piece miniature stainless steel package. Make it have excellent dynamic performance. Small size, streamlined, strong, compact shape structure.

Features of Miniature Pressure Sensor

  • Product size Φ3, Φ5, M6, M8, M10. Can be specially designed according to specific working conditions;
  • Small size, streamlined appearance;
  • split structure. Optional standard voltage, current, digital signal output. Meet the requirements of various working conditions;
  • High dynamic frequency response, steep rising edge;
  • Wide measuring range. Any range between -100Kpa~0-10KPa…60MPa;

Specifications of SI-51 Miniature Pressure Sensor

Measuring range -100KPa-0-10KPa…1MPa…60MPa
Measuring medium Gases or liquids compatible with 316 stainless steel
Static accuracy ±0.1%FS       ±0.25%FS        ±0.5%FS
Dimensions Φ3Φ5M6M8M10 (customizable)
Natural frequency 10KHz~1MHz
Product structure Transmitter: split type
Signal output/power supply 4-20mA  0-5V    0-10V  1-5V 12-36VDC (Typical 24VDC)
mV signal Constant voltage source/constant current source
Digital signal output RS485 5VDC/5-16VDC/24VDC
Operating temperature -4085
Compensation temperature -1060
Storage temperature -40100
Long term stability Typical: ±0.1%FS/year       Maximum: ±0.2%FS/year
Zero temperature drift Typical: ±0.02%FS/       Maximum: ±0.05%FS/
Sensitivity temperature drift Typical: ±0.02%FS/       Maximum: ±0.05%FS/
Overload capability 2 times full scale pressure or maximum 110MPa (take the minimum value)
Effective measurement life 106 pressure cycles (P:10-90%FS)                                                    
Vibration resistance 20g   IEC 60068-2-6
Impact resistance 20g11mS
Resolution Greater than 10-5 (usually limited acquisition and display equipment, theoretically infinitely small)
Load Resistance ≤(U-12)/0.02 Ω (current output)  
      >100KΩ (voltage output)
Insulation resistance 200MΩ100VDC
Electrical connections Connector or direct cable 2m2m
Interface and housing material 304/316L stainless steel
Shell protection IP65 (plug type)      IP67 (cable type)
Explosion-proof Ex iaⅡ CT5 (Intrinsically safe)
Seal ring Fluorine Rubber
Sensor diaphragm Stainless steel 316L
Product weight The sensor is about 20-30 grams, and the transmitter is about 300 grams

Extended reading: NB-IoT Wireless Pressure Transmitter Networking Solution

Miniature Pressure Sensor/Transducer Applications

  • Water turbine and underwater weapon test
  • Fluid mechanics and hydraulic tests
  • Aircraft and Engine Tests
  • Aerodynamic studies
  • Biomedical Science
  • wind tunnel test
  • manufacturing
  • Equipment matching

More Featured Pressure Sensors & Transducers

More Featured Pressure Measurement Solutions

Sino-Inst is a manufacturer of Miniature Pressure Sensors/Transducers.
We provide more than 10 types of Miniature Pressure Sensors/Transducers. -100KPa…-1KPa~0KPa…2KPa…10KPa…60MPa range is optional. Can be used for liquid or gas measurement.

SI-51 Miniature Pressure Sensor/Transducer, this series of transmitters adopts a split structure. The sensor is packaged exquisitely and has excellent dynamic performance. It not only solves the limitation of the placement position of the tested working condition, but also ensures the accuracy of subsequent output signals .

Miniature Pressure Sensors are used in aerodynamic research, aircraft and engine tests, wind tunnel tests, fluid mechanics and hydraulic tests, water turbines and underwater weapon tests, biomedicine, manufacturing and other fields. The influence of the field or the placement position, or the working conditions with dynamic frequency response requirements at the same time, can reproduce the changing law of the pulsating flow field without distortion.

If you need to purchase Miniature Pressure Sensor/Transducer, or have any technical questions about SI-51 Miniature Pressure Sensor/Transducer, please feel free to contact our engineers.

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Cryogenic Pressure Transducers

Cryogenic pressure transducer for low temperature pressure measurement.  -196℃~+125℃、-260℃/-350c(especial).

The Cryogenic pressure transducer adopts a stainless steel integrated packaging structure, and the pressure-sensitive diaphragm adopts an excellent special design. It works safely and stably in an ultra-low temperature -196℃ environment. Used for cryogenic scientific experiments such as liquid oxygen/liquid nitrogen/liquid hydrogen/cooling tank/recommendant/low temperature storage tank.

Sino-Inst offers a variety of Pressure Sensors for pressure measure and control. If you have any questions, please contact our sales engineers.

What is Cryogenic pressure transducer?

The Cryogenic pressure sensor adopts a stainless steel integrated packaging structure, and the pressure-sensitive diaphragm adopts a special design. This can make the sensor work stably in an ultra-low temperature -196 degrees Celsius environment.

Its advantages are small size and extremely high measurement accuracy. It brings convenience to scientific research work, high dynamic response frequency, strong corrosion resistance and long working life.

Even if the purchase cost is high, the later use value is much higher than its own value. In the future of technological development, low-temperature pressure sensors will be used more and more widely.

Read more about: What is industrial pressure transmitter?

Features of Cryogenic Pressure Transducer

  • 0-5vdc, 0-10vdc, 4-20mA Signal output optional
  • -196℃~+125℃、-260℃/-350c(especial)
  • Stainless Steel Construction
  • IP65 or IP67 enclosure
  • Product range: 0-2000bar

Extended reading: cryogenic fuel level indicator

Parameters of Cryogenic Pressure Transducer

Product range: 0-2000bar
Temperature: -196℃~+125℃, -260℃/-350c (especial)
Signal output: mv, 0-5vdc, 4-20mA, Hart, Rs485
Range: 0~0.2MPa…15MPa…60MPa Pressure type: absolute pressure, gauge pressure
Working voltage: 5-15VDC (10VDC) / 9-36vdc
Signal output: 0-5vdc, 0-10vdc, 4-20mA
Zero output: ±5%FS (typical)
Full load output: 10mV, 20mV, 100mV option
Linearity: 0.1%FS, 0.2%FS
Repeatability: 0.05%FS
Accuracy: ±0.25% FS, ±0.5% FS (default)
Room temperature: 0.1% FS, 0.2% FS, 0.5% FS
Low temperature: 0.5% FS% ~ 3% FS
Working temperature: -196℃~+125℃, -260℃/-350c (especial)
Low temperature zero drift: 1 ~ 4% FS (full-temperature zone)
High temperature zero drift: 1 ~ 4.5% FS (full-temperature zone)
Response frequency:> 1kHz or> 5kHz optional
Insulation resistance: ≥ 100MΩ/50V
Safe overload: 150% FS (1.5 times full scale)
Limit overload: 300% FS (3 times the full scale)
Vibration: 5 ~ 1000Hz, amplitude 2mm, X, Y, Z each to 30 minutes, the output changes less than 0.1% FS
Thread: M3, M4, M5, M6, M8, M10, M12 × 1 or a designated
Measuring medium: liquid oxygen/liquid nitrogen/liquid hydrogen, etc.
Humidity: 95% RH
Waterproof rating: IP65 or IP67 enclosure

Extended reading: Pressure indicator transmitters

Application of Cryogenic pressure transducer

Cryogenic pressure transducer has small size, high measurement accuracy, high dynamic response frequency, strong corrosion resistance and long working life.

Our professional technical group provides you with customized services. This product is mainly used for: low temperature scientific experiment, liquid

Oxygen, liquid nitrogen, liquid hydrogen, liquid helium, etc. Pressure and low temperature measurement of cooling tanks, cryogenic storage tanks, propellants, etc.
Cryogenic storage tanks for aerospace, aviation, naval vessels, etc.

If you need to measure not liquefied nitrogen and liquefied oxygen, but gas nitrogen and oxygen. You can refer to:

Industrial oxygen flow meters Nitrogen flow measurement

Extended reading: Cryogenic Flow Meters | Liquid Nitrogen-Liquid Oxygen

More Featured Pressure Transmitters

Extended Reading: Resistive Pressure Transducer

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

Sino-Inst 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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High Frequency Dynamic Pressure Sensor

Dynamic pressure sensor, the transmitter is a high frequency sensor.

The high frequency dynamic pressure sensor adopts silicon stack silicon technology. At the same time, it has high responsiveness. At the same time, it also has high accuracy in low frequency or static data. The high-frequency dynamic pressure sensor has its own hybrid temperature compensation, and the special processing can reach 2000℃ instantaneously. It can provide stable performance in a wide temperature range, with good linearity, high natural frequency, short rise time and wide excellent response frequency band.

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

Features of High Frequency Dynamic Pressure Sensor

  • Wide measuring medium range
  • Wide pressure measurement range
  • High natural frequency up to 2MHz
  • Stable work
  • Strong anti-interference ability
  • Original imported components, reliable performance.
  • Small size, light weight, complete types, high cost performance

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

Specifications of High Frequency Dynamic Pressure Sensor

Measuring range-100KPa~0~10KPa…200KPa…1MPa…100MPa
Type of pressureGauge pressure, absolute pressure, negative pressure
Long-term stabilityTypical: ±0.1%FS, maximum: ±0.2%FS/year
Comprehensive accuracy≤±0.25%FS, 0.5%FS
(Comprehensive accuracy includes: linearity + repeatability + hysteresis)
Overload pressure2 times full scale pressure
(100MPa product overpressure is 1.1 times full scale pressure)
Ambient temperature-20 … +85℃
Medium temperature-40 … +85℃, special can be -10℃~200℃
Vibration influence≤±0.01%FS (X, Y, Z axis, 200Hz/g)
Load Resistance≤(U-12)/0.02Ω
Natural frequency150KHz~2MHz
Transmitter frequency response0~1KHz~200KHz
Rise Time0~1mS~2μS
Zero temperature driftTypical: ±0.02%FS/℃, maximum: ±0.05%FS/℃
Sensitivity temperature drift±0.02%FS/℃, maximum: ±0.05%FS/℃
ResolutionInfinitely small in theory, usually 1/100000
MediumGas or liquid compatible with 316 stainless steel
Power supplyTransmitter power supply: 12~36VDC (generally 24VDC),
±15VDC switching power supply or linear power supply
Sensor power supply: constant current: 1mA~4mA;
constant voltage: 5VDC~24VDC
Signal outputAnalog: 4~20mA, 1~5 V DC, 0~10VDC, 0~5V DC
Sensor output: 1.5mV~15mV/V
Insulation resistance100MΩ, 500VDC
Electrical protectionReverse polarity protection, anti-electromagnetic interference
Liquid contact material316L stainless steel
shell material304 stainless steel
Process connectionM20*1.5, G1/4, flush film, other threads can be designed according to customer requirements
Electrical connectionThe cable is IP67 and the connector connection is IP65
weight0.25KG

You may like: How does a pressure transmitter work?

Applications of High Frequency Dynamic Pressure Sensor

  • Military engineering
  • Chemical explosion test
  • Petroleum prospecting and well testing
  • Fluid mechanics
  • Internal combustion engine system
  • aerodynamics
  • Scientific tests such as hydraulic power machinery test
  • Chemical explosion test

Read more about: What is industrial pressure transmitter?

More Featured Pressure Sensors

SI-303 Low-Pressure Transducer
Low pressure transducers for air and non-corrosive gases low pressure measurement. 0 ~ 2.5kPa to 0 ~ 30kPa measurable.
SI-350 Sanitary Pressure Transmitter
Sanitary Pressure Transmitter, also called tri clamp pressure transmitter,
is the pressure transducer with the flush diaphragm (flat membrane) as the pressure sensor.
SI-300 Pressure Transducer 4-20mA/Voltage
The 4-20mA/ Voltage Pressure Transducer,
also called pressure transmitter 4-20mA,
is a pressure sensor with4-20ma/Voltage output.
SI-390 Industrial Pressure Transmitter
Pressure transmitters for general industrial applicaitons. -0.1kPa ~ 0 ~ 0.01kPa ~ 100MPa ~150MPa. 0.1% FS, 0.25% FS, 0.5% FS. 4-20mA (2-wire system), 0-5 / 1-5 / 0-10V (3-wire system)
SI-512H High Temperature Pressure Sensor
High Temperature Pressure Sensor for pressure measurement of high temperature gas or liquid. Such as steam pressure. High temperature up to 800 ℃.

SIJC-1000HSM-Silicon Pressure Sensor
Silicon pressure sensor, also known as Diffused silicon pressure sensor. Silicon pressure sensors are low cost.
SI-706 Combined Pressure and Temperature Sensor-Dual function
Combined pressure and temperature sensor for Simultaneous measurement of pressure and temperature.
Thermocouple types: J, K, E type or PT100 platinum resistance. Two outputs do not affect each other. 
SI-338 Ceramic Pressure Sensor
Ceramic pressure sensor is a pressure sensor refined from a thick ceramic base using a refined ceramic base. Cost-effective. Support OEM processing. 0-0.2MPa -…- 40MPa

Extended reading: Static pressure vs dynamic pressure vs total pressure

More Solutions for pressure measurement

Extended Reading: Digital Pressure Sensor-RS485

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

Sino-Inst  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.

SI-338 Ceramic Pressure Sensor

Ceramic pressure sensor is a pressure sensor refined from a thick ceramic base using a refined ceramic base.

SI-338 Ceramic pressure sensor uses ceramic or diffused silicon core. All stainless steel package, small and beautiful appearance. Suitable for occasions with limited installation space. Wide range temperature compensation, high accuracy, small size, no adjustment, wide range coverage. Support OEM processing. Ceramic pressure transmitter is used in compressor, air conditioning and other pressure measurement.

Sino-Inst is a manufacturer of Ceramic Pressure Sensor in China. Committed to the manufacture, sales and engineering support of Ceramic Pressure Sensos.

Features of Ceramic Pressure Sensor

  • Small volume
  • Light weight
  • Easy to install and use
  • Cost-effective and compact economy
  • 0-0.2MPa -…- 40MPa pressure range measurement
  • Multiple industry standard signal output options
  • Wiring method is connector or direct lead
  • Compact design, high cost performance
  • Various pressure interfaces can be selected

Specifications of Ceramic Pressure Sensor

Range0-0.2MPa-……-40MPa
Comprehensive accuracy0.5%FS、1.0%FS、2.0%FS
output signal4-20mA、0-5V、0.5-4.5V
Supply voltage+5VDC、+12VDC、+24VDC
Process connectionG1/4、G1/2、G1/8、M20*1.5、M14*1.5
Electrical connectionsWaterproof connector
Compensation temperature0-65 ° C (default)
Operating temperature-20-125°C
Safety overload150-200%
Extreme overload200-250%
Long-term stability1% FS / year
Response timeLess than 1ms
shell material304 stainless steel
Protection classIP67, IP65

Applications of Ceramic Pressure Sensor

  • Engine Fuel Pressure measurement
  • Refrigeration and Air Compressor
  • Hydraulic pressure controller
  • Petrochemical industry
  • HAVC System Application
  • Pressure meter
  • Laboratory equipment
  • Water pressure measurement
  • Saving water to irrigate
  • Liquid and Gas pressure measurement

Extended reading: Industrial Pressure Transmitters|Buy from the manufacturer

Ceramic pressure sensor working principle

The corrosion-resistant ceramic pressure transmitter has no liquid transfer. Pressure acts directly on the front surface of the ceramic diaphragm. Make the membrane slightly deformed. Thick film resistors are printed on the back of the ceramic diaphragm and connected to form a closed Wheatstone bridge.

Due to the piezoresistive effect of the varistor, the bridge generates a voltage signal that is highly linear and proportional to the pressure and proportional to the excitation voltage. The standard signal is calibrated to 2.0 / 3.0 / 3.3 mV / V according to the different pressure ranges, which is compatible with strain gauge transmitters.

Through laser calibration, the transmitter has high temperature stability and time stability. The transmitter comes with temperature compensation of 0 ~ 70 ℃, and can directly contact most media.

Ceramic is a recognized material with high elasticity, corrosion resistance, wear resistance, shock resistance and vibration. The thermal stability of ceramics and its thick film resistance can make its operating temperature range as high as -40 to 135 ° C, and it has high accuracy and stability for measurement. The degree of electrical insulation is> 2kV, the output signal is strong, and the long-term stability is good.

Extended reading: Static pressure vs dynamic pressure vs total pressure

Ceramic Diaphragm Pressure Sensor

The ceramic Diaphragm pressure sensor is a ceramic piezoresistive pressure sensor refined by a thick ceramic process using a refined ceramic base. Overall dimension Φ18mm * 6.35mm. Ceramic is a recognized material with high elasticity, corrosion resistance, wear resistance, impact resistance and vibration.

The good thermal stability of the ceramic and the high-temperature sintering process of the thick film make the working temperature range of the ceramic pressure sensor up to -40 ~ 125 ℃. The ceramic’s high elasticity and creep resistance make the ceramic pressure sensor have good long-term stability. In addition, the corrosion resistance of ceramics makes it uniquely advantageous in the fields of refrigeration, chemicals and environmental protection.

Sensor characteristics

● Ceramic overload sensitive diaphragm
● Zero point, full range laser calibration
● Excellent anti-corrosion and anti-wear performance
● Anti-shock and anti-vibration
● High precision and high stability
● Wide operating temperature range
● Small size and easy packaging
● Environmental protection

Ceramic Capacitive Pressure Sensor

Ceramic capacitive sensors use the most advanced ceramic technology, thick film electronic technology, and SMT technology.

Compared with other current capacitive sensors, the ceramic capacitive sensor uses a dry ceramic capacitive sensor without intermediary liquid, thus obtaining superior technical performance.

  • High stability, better than 0.10oF “S. every year
  • The temperature drift is small, ± 0.150o / lOK.
  • It has strong anti-overload and impact capability, and the overload can reach several times to one hundred times of the measuring range. Even if the measuring element is directly hit with a hard object, it will not be damaged.
  • It can be applied to medium measurement in various occasions in many industries.

Piezoresistive Pressure Sensor

The piezoresistive pressure sensor is constructed using the piezoresistive effect of single crystal silicon. A single crystal silicon wafer is used as an elastic element, and an integrated circuit process is used on the single crystal silicon membrane. A group of equivalent resistors are diffused in a specific direction of the single crystal silicon, and the resistors are connected into a bridge circuit. The single crystal silicon wafer is placed on Sensor cavity. When the pressure changes, the single crystal silicon produces strain, so that the strain resistance directly diffused thereon changes proportional to the measured pressure. Then the bridge circuit obtains the corresponding voltage output signal.

Low-Pressure Transducer
Combined Pressure and Temperature Sensor-Dual function
High Temperature Pressure Sensor
Ultra-High Pressure Senors

Frequently
Asked
Questions

The ceramic pressure sensor is mainly composed of three parts: ceramic ring, ceramic diaphragm and ceramic cover.

The ceramic diaphragm is used as a sensitive elastomer. It is made of 95% AL2O3 porcelain. It is required to be flat, uniform and dense, and its thickness and effective radius depend on the design range.

The ceramic ring is formed by hot die casting process at high temperature.

High temperature glass paste is used between the ceramic diaphragm and the ceramic ring. They are fired together by thick film printing and thermal firing techniques to create a force-sensitive cup-shaped elastomer with a perimeter support. That is, a rigid structure without creep should be produced in the peripheral fixed part of the ceramic.

On the upper surface of the ceramic diaphragm, that is, the bottom of the porcelain cup and tea set, the circuit of the sensor is made by thick film technology.

The circular groove in the lower part of the ceramic cover creates a corresponding gap between the cover and the diaphragm. Limits prevent rupture of the diaphragm due to excessive bending when overloaded, resulting in overload protection of the sensor.

There are many types of pressure sensors. Such as resistance strain gauge pressure sensor, semiconductor strain gauge pressure sensor, piezoresistive pressure sensor, inductive pressure sensor, capacitive pressure sensor, resonant pressure sensor, etc.

The most widely used pressure sensors are:
Diffused silicon piezoresistive pressure sensor,
Ceramic Piezoresistive Pressure Sensors,
sputtered thin film pressure sensor,
capacitive pressure sensor,
High temperature sapphire pressure sensor.
But the most widely used is the piezoresistive pressure sensor. It has a very low price and high accuracy and better linearity characteristics.

A pressure sensor works by converting pressure into an analogue electrical signal.

The demand for pressure measuring instruments increased during the steam age. When pressure sensing technologies were first manufactured they were mechanical and used Bourdon tube gauges to move a needle and give a visual indication of pressure. Nowadays we measure pressure electronically using pressure transducers and pressure switches.

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

SI-706 Combined Pressure and Temperature Sensor-Dual function

Combined pressure and temperature sensor for Simultaneous measurement of pressure and temperature.

The Combined pressure-temperature sensor uses a special core. Thermocouple types are: J, K, E type or PT100 platinum resistance. Integrated structure of temperature and pressure. Measure the medium pressure and temperature at the same point at the same time. The combined pressure and temperature sensor has a built-in temperature / pressure sensor. The two outputs do not affect each other. Consuming the power of one sensor can complete the pressure and temperature measurement. Widely used in scientific research, military industry, petrochemical, electric power, metallurgical machinery and environmental protection fields. Such as oil well temperature and pressure measurement, diesel engine common rail temperature and pressure measurement, injection machinery temperature and pressure measurement.

Sino-Inst is a manufacturer of Combined Pressure and Temperature Sensor in China. Committed to the manufacture, sales and engineering support of Combined Pressure and Temperature Sensors.

Combined Oil pressure and temperature sensor Features

  • Use imported resistance strain gauge or diffused silicon pressure-sensitive chip. High-precision PT100 temperature sensor
  • Advanced placement technology. With zero point, full range compensation, temperature compensation;
  • High precision and high stability amplification integrated circuit;
  • Isolation diaphragm design. Integrated structure design. Impact resistance, fatigue resistance and high reliability;
  • Fully sealed welding structure. Protection grade reaches IP67;
  • Diversified pressure output signals. General analog output, digital RS485 / RS232 output, etc .;
  • The structure is small, and the minimum outer diameter can reach 26mm;

Specifications of Combined Pressure and Temperature Sensor

  • Range: 0-20, 30-600KPa, 1, 5, 10, 20, 50-100MPa
  • Comprehensive accuracy: 0.2% FS, 0.5% FS, 1.0% FS
  • Output signal: 4-20mA (two-wire system), 0-5 / 1-5 / 0-10VDC (three-wire system)
  • Temperature signal output: J, K, E type thermocouple or PT100 platinum resistance, digital temperature signal DS18B20
  • Power supply voltage: 24VDC (10-30VDC)
  • Medium temperature: -20 ~ 85 ~ 350 ℃
  • Ambient temperature: -20 ~ 85 ℃
  • Load resistance: current output type: max. 800Ω; voltage output type: greater than 50KΩ
  • Insulation resistance: greater than 2000MΩ / 50VDC
  • Sealing grade: IP65
  • Long-term stable performance: 0.1% FS / year
  • Vibration effect: within the mechanical vibration frequency of 20Hz ~ 1000Hz. The output change is less than 0.1% FS
  • Electrical interface: direct outlet or aviation connector outlet
  • Mechanical connection: G1 / 2-14, M20 × 1.5, etc. Other threads can be designed according to customer requirements

Extended reading: RTD vs. Thermocouple: What’s the Difference, and Which Should You Use?

Applications of Combined Pressure and Temperature Sensor

  • Aerospace
  • Analytical Instruments
  • Hydraulics
  • Hydrogen (Consult factory for media compatibility)
  • Test Stands
  • HVAC
  • Alternative energy management
  • Engine Controls & Monitors

Why use a Dual Pressure and Temperature Sensor?

Temperature and pressure integrated dual-function type: pressure, temperature measurement. The main reason for using dual pressure and temperature sensors is to save space. It can be widely used in the occasions where pressure and temperature need to be measured simultaneously in industrial control detection.

The integrated temperature coefficient organically integrates the temperature sensing element (thermal resistance or thermocouple) with the signal conversion and amplification unit. Thermocouple types are: J, K, E type or PT100 platinum resistance. Integrated structure of temperature and pressure. Simultaneously measure the medium pressure and temperature at the same point. It is suitable for measuring the temperature of the medium while measuring the pressure.

Working principle of Pressure and Temperature sensor

Thermocouples or thermal resistance sensors convert the measured temperature into electrical signals. Then send the signal to the input network of the transmitter. The network contains related circuits such as zero adjustment and thermocouple compensation.

The signal after zero adjustment is input to the operational amplifier for signal amplification. The amplified signal is output with 4-20ma DC current after being calculated and processed by the v / i converter. The other channel is processed by the a / d converter and displayed on the meter header.

There are two types of transmitter linearization circuits, both of which use feedback. For the RTD sensor, use positive feedback to correct it. For the thermocouple sensor, the multi-section broken line approach method is used for correction.

Ultra-High Pressure Senors
Sanitary Pressure Transmitter
Flush diaphragm pressure sensor
Melt Pressure Sensors/Transducers – High Temperature

Sino-Inst offers pressure and temperature sensors. A wide variety of pressure and temperature sensor options are available to you. Such as free samples, paid samples. Sino-Instrument is a globally recognized manufacturer of pressure and temperature sensors, located in China.

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

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SI-512H High Temperature Pressure Sensor

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

High Temperature Pressure Sensors from Sino-Inst operate beyond standard 85°C to 125°C ranges, withstanding temperatures up to 800°C. These pressure sensor high temperature devices offer stable and repeatable output in various industries like test and measurement and downhole tool operations.

Engineers can easily calibrate these sensors due to their accurate performance over a wide temperature range. Choose between millivolt and amplified designs to find the ideal High Temperature Pressure Sensor for your needs, ensuring precise measurements and optimized efficiency in demanding conditions.

Sino-Inst is a manufacturer of high temperature pressure sensors in China. Committed to the manufacture, sales and engineering support of high temperature pressure sensors.

Features of High Temperature Pressure Sensor

  • High temperature -40 ℃ ~ 200 ℃; -40 ℃ ~ 400 ℃; -40 ℃ ~ 600 ℃; -40 ℃ ~ 800 ℃
  • Stainless steel integrated structure can adapt to harsh environments
  • Small size, high accuracy, high cost performance, high stability
  • -100KP ~ 0 ~ 100MPA
  • Various standard signal output options, convenient for user debugging
  • Lightning protection, electromagnetic / radio frequency interference resistance
  • Wide power supply range (5 ~ 40V)
  • With zero point, full scale adjustable
  • SS304 stainless steel housing structure

Extended Reading: What is a MEMS pressure sensor?

Specifications of High Temperature Pressure Sensor

  • Range: -100KPa ~ 0 ~ 100MPa optional
  • Accuracy: ± 0.5% FS (composite error including non-linear repeatability hysteresis)
  • Output signal: 4 ~ 20mADC (two-wire system), 0 ~ 10mADC, 0 ~ 20mADC, 0.5 ~ 4.5VDC, 0 ~ 5VDC, 1 ~ 5VDC, 0 ~ 10VDC (three wire system)
  • Power supply voltage: 5 ~ 40VDC (two-wire system), 15 ~ 40VDC (three-wire system)
  • Medium temperature: -40 ℃ ~ 200 ℃ -40 ℃ ~ 400 ℃ -40 ℃ ~ 600 ℃ -40 ℃ ~ 800 ℃
  • Ambient temperature: -30 ℃ ~ 105 ℃
  • Pressure connection: M20 * 1.5 M22 * 1.5 M16 * 1.5 M11 * 1 NPT1 / 4 NTP1 / 2 NTP3 / 8 G1 / 8 G1 / 2 G1 / 4 G3 / 8,1 / 2-20UNF, etc. Other threads can be according to customer requirements design
  • Zero temperature drift: ≤ ± 0.02% FS ℃
  • Range temperature drift: ≤ ± 0.02% FS ℃
  • Compensation temperature: 0 ~ 80 ℃
  • Safety overload: 150% FS ℃
  • Ultimate overload: 200% FS ℃
  • Response time: 5 mS (up to 90% FS)
  • Vibration effect: The frequency is 10 ~ 100KHZ, the acceleration is 10g, all the effects are less than ± 0.1% FS
  • Test medium: Various liquids and gases compatible with 17-4PH stainless steel
  • Housing material: 304 or 316 stainless steel
  • Electrical connection: Hessman 3009 connector

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

Applications of High Temperature Pressure Sensor

High Temperature Pressure Sensor is used in industrial fields such as water plants, oil refineries, sewage treatment plants, building materials, light industry, machinery, etc. to achieve the measurement of liquid, gas and vapor pressure.

Application examples:

  • Industrial field process pressure detection
  • Laboratory pressure calibration system
  • Nautical and shipbuilding
  • Aviation and aircraft manufacturing.
  • Air separation equipment and thermal power units

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

Cooling Element

Can pressure transmitters measure high temperature media?

Customers often have such a question. So can pressure transmitters really measure high temperature media? The answer is yes.Of course, the pressure transmitter cannot directly contact the high-temperature medium. Prolonged contact with high-temperature media can easily damage the pressure sensor. Usually when measuring high temperature media, the pressure transmitter will be equipped with a stainless steel heat sink device. Avoid direct contact between the medium and the transmitter. A condensing tube can also be added on the basis of the heat sink to reduce the damage to the transmitter caused by excessive temperature.

Read more about: What is industrial pressure transmitter?

High temperature-resistant pressure transmitters use Hessman connectors to keep the signal stable, the circuit design is constantly optimized, and the anti-interference ability is strong. The heat sink and core are fully combined to work normally at high temperatures.

High temperature-resistant pressure transmitter:

  1. Adding stainless steel heat sink on the basis of standard type and industrial type is high temperature type product, divided into standard high temperature type and industrial high temperature type. 4 ~ 20mA output, voltage 0 ~ 5V / 1 ~ 5/0 ~ 10V, etc.
  2. Standard high temperature type, all stainless steel structure, small size and easy installation. High temperature industrial type, cast aluminum housing, terminal output and simple wiring. When the current output is required, a digital display meter can be optionally provided.
  3. Standard high temperature type, high temperature industrial type, optional intrinsically safe explosion-proof box isolation and explosion-proof.
  4. The computer compensation technology is adopted, and the temperature drift is small. ± 0.01% FS / ℃ integrated circuit, high precision, strong anti-interference ability.
  5. Applied in petroleum, chemical, steel, light industry, machinery and equipment, energy constant pressure variable frequency water supply and other industries pressure detection. When the temperature is quite high, a condenser tube or a condenser is still used.

Add-on High Temperature Adapter

Add-on High-Temperature Adapter can also be called a pressure buffer tube. The role is to cool the measured medium and smooth the pressure fluctuations. When the pressure of the liquid, steam, and condensable gas whose temperature is higher than 60 ℃ is detected, the source port of the pressure sensor installed locally shall have a ring-shaped condensation ring or a U-shaped condensation bend.

Add-on High-Temperature Adapter is mainly used in a high-temperature environments with permeable or saturated steam. Avoid direct contact with high-temperature fluid inside the pressure sensor.

Read more about: Steam pressure transmitter-Pressure measure on steam pipeline 

Pressure and Temperature Sensor-Dual function
Ceramic Pressure Sensor
Ultra-High Pressure Senors
Liquid pressure sensor

pressure sensor for steam

Pressure transmitters are used for steam metering and pipeline monitoring.

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

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

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

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

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

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

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

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

Extended Reading: FMCW Radar for High Temperature Level Sensor

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

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

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

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

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

Some pressure transmitters will be protected by dampers and baffles.

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

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

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

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

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

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

Extended Reading: Electronic Pressure Switch for Air Compressor

Frequently
Asked
Questions

A high pressure sensor is a device that converts the measured electrical parameters into DC current, DC voltage and isolates and outputs analog or digital signals.

The high pressure sensor usually adopts the selected foreign patch technology. The working principle is that the pressure of the measured pressure acts directly on the sensing piece of the sensor. The sensing piece produces a micro-displacement proportional to the pressure, and the resistance value of the sensor changes. And use the electronic circuit to detect this change. And convert and output a standard measurement signal corresponding to the pressure.

High temperature sensor is a kind of pressure sensor commonly used in industrial practice. It is widely used in various industrial automatic control environments.

The working principle of the high temperature sensor: the pressure of the wind pressure sensor acts directly on the diaphragm of the sensor. 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 The conversion outputs a standard signal corresponding to this pressure.

Extended reading: High Temperature Flow Meter

In HVAC systems, end sensors and controllers are the key components to ensure the smooth operation of the entire system and achieve energy-saving effects.

In the central air conditioner, the filter is used to filter the dust and impurities in the ventilation duct. The pressure sensor at the indoor vent is used to monitor the air pressure difference between the two ends of the filter at the air outlet. With the accumulation of time, the dust on the filter will accumulate more and more. It will gradually affect the air circulation of the filter. When the air circulation is not smooth, the air pressure difference between the two ends of the filter will continue to increase.

When the pressure sensor senses the pressure change, the upper computer receives the signal from the pressure sensor. When the signal value reaches the alarm point, it will start to alarm. It reminds the cleaning staff to replace or clean the filter. In addition to this role, the pressure sensor is also used to participate in the control of the air supply volume of the air outlet.

Extended reading: Miniature Pressure Switch

To measure pressure at high temperatures, you need a High Temperature Pressure Sensor designed to withstand extreme temperatures. These sensors typically use special materials and construction methods to ensure accurate and stable pressure readings even in environments with elevated temperatures.

Pressure sensor failures can result from several factors, including:

  • Overpressure: Exceeding the sensor’s rated pressure limit can cause permanent damage.
  • Temperature extremes: Prolonged exposure to temperatures outside the sensor’s specified range may cause sensor failure.
  • Mechanical stress: Physical damage, such as dropping or mishandling, can impact the sensor’s performance.
  • Corrosion: Exposure to harsh chemicals or corrosive substances can lead to sensor deterioration.
  • Electrical issues: Overvoltage, electromagnetic interference, or faulty wiring can damage the sensor’s electronics.

A pressure and temperature sensor is a combined device that measures both pressure and temperature in a single unit.

The pressure sensing element, usually a piezoresistive or capacitive element, converts the applied pressure into an electrical signal.

The temperature sensing element, often a thermocouple or RTD, measures the temperature by producing a voltage or resistance change proportional to temperature variations. The sensor’s output signals are then processed and converted into readable values.

A pressure sensor detects and measures the pressure of a fluid or gas. It converts the pressure into an electrical signal, which can be read and processed by control systems, instruments, or data acquisition devices. Pressure sensors can be used in various applications, such as monitoring pressure in pipelines, HVAC systems, automotive systems, and industrial processes.

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

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SI-PT series Melt Pressure Sensors/Transducers – High Temperature

Melt pressure transducers work for pressure measurement & control of melt under high temperature.

SI-PT series melt pressure sensors work for high temperature melt pressure measurement and control. SI-PT series high temperature melt pressure sensor has the advantages of high accuracy. Good stability. Large output signal. Good dynamics and strong versatility. Melt pressure sensors are widely used in: Gas pipe production lines. Plastic pipe production line. Geonet unit. Single corrugated pipe production line. Core layer foamed pipe production line. Plastic sheet (sheet) extrusion line. Polystyrene foam pipe production line. Film blowing unit, extrusion unit, PE stretch film unit, etc.

Sino-Inst’s also offers hazardous location melt pressure transducer just as you need.

Sino-Inst is a manufacturer of high temperature melt pressure sensors in China. Committed to the manufacture, sales and engineering support of high temperature melt pressure sensors.

Featured Melt Pressure Sensors/Transducers

ModelSI-PT 111 Melt Pressure Sensor
DescriptionPT111-series high temperature melt pressure sensor is mainly used for pressure measurement and control of molten materials under high temperature conditions.
FeaturesHigh accuracy.
Stable and reliable.
The output signal is large.
Good dynamic performance.
Strong versatility
Specifications1: Pressure range: 0 ~ 5MPa ~ 100MPa;
2: Accuracy: + 0.5% FS; + 1.0% FS;
3: Working power: 10VDC (6–12VDC);
4: Output signal: 0 ~ 5V; 0 ~ 10V; 4-20mA;
5: Calibration method: 80% FSO + 1%;
6: Probe temperature resistance: 300 ℃;
7: Temperature drift: ≤0.30Mpa / 100 ℃;
8: Electrical connection: universal five-core connector; military five-core connector;
9: Overload pressure: 1.5 * FS;
10: Mechanical connection: 1/2 “-20UNF, M14 * 1.5, M22 * 1.5, G3 / 4 and other multi-thread sizes;
11: Anti-corrosion and wear-resistant coating: suitable for pressure measurement of high-concentration rough media, which can increase the applicable life 3-5 times;
ApplicaitonsWidely used in petroleum, chemical fiber, plastic, rubber and other industries.
ModelSI-PT112 melt pressure transmitter
DescriptionPT112 series rigid rod high-precision pressure transmitter is mainly used for various occasions that require accurate data measurement. This product uses special material and alloy elastic diaphragm to reduce temperature drift and improve measurement accuracy. The zero full scale can be adjusted, and the amplified signal is directly input to the PLC, and the internal 80% calibration.
FeaturesHigh precision.
Stainless steel package.
Easy to install.
Can replace similar imported products.
80% internal alignment.
Good stability repeatability.
Specifications1. Measuring range: 0… 5MPa ~ 0… 200MPa
2. Comprehensive accuracy: ± 0.25% FS; ± 0.5% FS
3. Output signal: transmitter signal: 0 ~ 5V; 0 ~ 10V; 4-20mA; sensor signal: 2mV / V; 3.33mV / V
4. Power supply voltage: Transmitter: 24VDC (12 ~ 36) VDC; Sensor: 10VDC
5. Process connection: 1/2 ″ -20UNF, M14 × 1.5, M18 × 1.5, M22 × 1.5, G3 / 4 ″ optional
6. Electrical connection: 5 cores, 6 cores, optional
ApplicaitonsHigh temperature fluid media in chemical fiber spinning, polyester, and other equipment.
ModelSI-PT123 flexible high temperature melt pressure transducer
DescriptionPT123 flexible hose-type melt pressure sensor, which is equipped with a temperature sensor, can achieve the same point pressure and temperature measurement.
FeaturesHigh precision;
Stainless steel package;
Easy installation;
Can completely replace similar imported products;
80% internal calibration;
Good stability and repeatability
Specifications1. Measuring range: 0… 3.5MPa ~ 0… 150MPa
2. Comprehensive accuracy: ± 0.25% FS; ± 0.5% FS
3. Output signal: 2mV / V; 3.33mV / V
4. Power supply voltage: 10 (9 ~ 12V) DC
5. Process connection: 1/2 ″ -20UNF, M14 × 1.5, M18 × 1.5 (customer-defined)
6. Diaphragm temperature: 350 ℃ (* High 400 ℃)
7. Diaphragm material: 15-5PH coated stainless steel
8. Electrical connection: 5 core, 6 core
ApplicaitonsPressure measurement and control of high temperature fluid media in chemical fiber spinning, polyester and other equipment.
ModelSI-PT124 high temperature melt pressure sensor
DescriptionRigid rod, hose isolation, diaphragm isolation structure, PT124 high temperature melt pressure sensor can be completely interchangeable with similar products such as American Dynisco, GEFRAN, RKC.
FeaturesRigid rod, hose isolation, diaphragm isolation structure
Specifications1. Pressure range: optional within 0 ~ 5MPa ~ 200MPa;
2. Accuracy: + 0.25% FS; + 0.5% FS;
3. Input voltage: 10VDC (6–12VDC);
4. Output signal: 1.5mv / v, 2.0mV / V, 3.3mV / V;
5. Calibration method: 80% FSO + 1%;
6. Probe temperature resistance: 450 ℃;
7. Temperature drift: ≤0.30Mpa / 100 ℃;
8. Electrical connection: universal five-core connector;
9. Overload pressure: 1.5 * FS; high temperature melt pressure transmitter
10.Mechanical connection: 1/2 “-20UNF, M14 * 1.5, M18 * 1.5, M22 * 1.5, and other multi-thread sizes;
11. Anti-corrosion and wear-resistant coating: suitable for pressure measurement of high-concentration rough media, which can increase the applicable life 3-5 times;
ApplicaitonsPressure measurement and control of high temperature fluid media used in chemical fiber spinning, polyester, rubber and plastic machinery.

ModelSI-PT127 high temperature melt pressure sensor
DescriptionPT127 high temperature melt pressure sensor is mainly used in various occasions that require accurate data measurement. This product uses special material and alloy elastic diaphragm to reduce temperature drift and improve measurement accuracy.
FeaturesRigid rod, hose isolation, diaphragm isolation structure. Good stability and accuracy;
Specifications1. Range: 0 ~ 5 ~ 200MPa
2. Comprehensive accuracy: 0.5% FS; 1% FS
3. Output signal: 1.5mV / V; 2mV / V; 3.33mV / V 4. Power supply voltage: 10VDC
5. Temperature model: J, K, E, PT100
6. Diaphragm temperature resistance: 450 ℃
7. Electrical connection: 5-pin connector 5 pin
8. Process connection: M22 × 1.5; special design
ApplicaitonsMeasurement and control of pressure and temperature of high temperature fluid media of chemical fiber spinning, polyester, rubber and plastic machinery and other equipment.
ModelSI-PT131 high temperature melt pressure and temperature transducer
DescriptionPT131 has good stability and accuracy. It is completely interchangeable with similar products such as Dynisco, GEFRAN, RKC, etc.
FeaturesRigid rod, hose isolation, diaphragm isolation structure
Specifications1: Pressure range: optional within 0 ~ 5MPa ~ 200MPa
2: Accuracy: + 1.0% FS; + 0.5% FS;
3: working power: 10VDC (6–12VDC);
4: Output signal: PT131 series: 1.5mv / v, 2.0mV / V, 3.3mV / V
5: Calibration method: 80% FSO + 1%;
6: Probe temperature resistance: 450 ℃
7: Temperature Model: PT131 (E; J; K)
8: Electrical connection: PT131-series: universal seven-core connector
9: Overload pressure: 1.5 * FS
10: Mechanical connection: 1/2 “-20UNF, M14 * 1.5, M18 * 1.5, M22 * 1.5, etc.
11: Anti-corrosion and wear-resistant coating: suitable for pressure measurement of high-concentration rough media, which can increase the applicable life 3-5 times
ApplicaitonsPressure measurement and control of high temperature fluid media used in chemical fiber spinning, polyester, rubber and plastic machinery.
ModelSI-PT2616 flange high temperature melt pressure transmitter
DescriptionPT2616 flange high temperature melt pressure transmitter is a new pressure measuring transmitter launched by our company. It is used to measure high precision and pollution-free environment. The product combines the latest technology of the industry, using special elastic diaphragm and pressure Strain gauges. Greatly reduced measurement error, more stable and more wear-resistant.
FeaturesHigh precision, stainless steel material sealing, simple installation, good stability, zero degree full scale adjustable, linear output can be directly PLC, good working characteristics and explosion-proof.
Specifications1. Pressure measuring range: 0 ~ 5, 0 ~ 200Mpa
2. Accuracy: ≤ ± 0.5% full scale
3. Signal output: 1.5mv / v, 2.0mV / V, 3.3mV / V
4. Input voltage: 10VDC (6-12) VDC
5. Electrical connection: 6-pin universal aviation plug
6. Mechanical connection: flange connection, size can be customized
7. Diaphragm temperature resistance: 300 ℃
8. Overpressure: 1.5% full scale
ApplicaitonsThis product is suitable for measuring the pressure of high temperature melt and the measurement of melt of plastic, plastic, rubber, chemical fiber and other extruder and extruder.
ModelSI-PT292 explosion-proof high temperature melt pressure transducer
DescriptionThe PT292 series is an intelligent 4-20mA pressure transmitter designed for use in hazardous areas. PT292 high temperature melt pressure transducer type products have passed the Class 1, Division I, Groups A, B, C and D explosion-proof certification. Explosion-proof products include wire connections. Type PT292 is ATEX II 1 G 100a certified and Eex ia IIC 0 and 1 zone intrinsically safe. This intrinsically safe and ATEX version is available with either a connection wire connection or a 6-pin connection.
FeaturesConfigurable by hand;
Repeatable precision pressure measurement;
Direct output to DCS or PLC;
Users can precisely adjust the pressure range;
Certification for use in hazardous environments;
Meets new EC requirements
Specifications1. HARTTM Digital Communications
2. Comprehensive error better than ± 0.25%
3. 4-20mA loop-powered output
4. 0-500 to 0-30,000 psi
5. Ex, intrinsically safe or ATEX certified
ApplicaitonsPressure measurement and control of high temperature fluid media used in chemical fiber spinning, polyester, rubber and plastic machinery.

Extended reading: Flat Pressure Sensor for High Viscosity Fluids

Working Principle of Melt Pressure Transducer

The working principle of the melt pressure sensor is that the pressure of the medium directly acts on the diaphragm of the sensor. The diaphragm produces a micro-displacement proportional to the pressure of the medium. The resistance of the sensor changes. The change is detected by electronic circuits. The conversion outputs a standard signal corresponding to this pressure.

Precautions for buying high temperature melt pressure sensors

1. What kind of pressure is being measured. Generally, the maximum pressure range of the high temperature melt pressure sensor you need should reach 1.5 times the maximum pressure value of your system. All high temperature melt pressure sensors are designed to withstand the maximum pressure for 200 million cycles without degrading performance. You need to find a compromise solution between system performance and high temperature melt pressure sensor life.

2. Consider the type of media that needs to be measured. The key factor to consider when selecting a high temperature melt pressure sensor is the medium being measured. Will it be a viscous liquid or a slurry on the pressure head? Is the contact with the high temperature melt pressure sensor a soluble or corrosive medium or clean dry air? This question determines whether impact dies are needed and what materials are used to make contact with the media.

3. Consider the accuracy you need to achieve. Accuracy is a term commonly used by manufacturers to describe the output error of high temperature melt pressure sensors. The cost of having a higher accuracy high temperature melt pressure sensor will be higher. Then your system really needs such high accuracy ? A system consisting of a high-precision high-temperature melt pressure sensor and a low-resolution instrument is actually a low-efficiency solution.

4. Carefully consider the temperature resistance, interchangeability, time stability and ruggedness of the high temperature melt pressure sensor to be purchased.

5. What output method does the high temperature melt pressure sensor you want to use. The required excitation voltage, and how to connect the high temperature melt pressure sensor to your electrical system.

Extended Reading: strain gauge pressure transducer

Use of high temperature melt pressure sensor

Installation

The correct installation position of the high temperature melt transmitter on the process pipeline is related to the measured medium. In order to obtain the best measurement results, pay attention to several points:

  1. Prevent the transmitter from coming into contact with corrosive or hot media;
  2. When measuring liquid pressure, the pressure taking port should be opened on the side of the process pipeline to avoid sedimentation;
  3. Prevent dross from depositing in the duct;
  4. When measuring the gas pressure, the pressure taking port should be opened at the top of the process pipeline, and the transmitter should also be installed at the top of the process pipeline so that the accumulated liquid can be easily injected into the process pipeline;
  5. When measuring steam or other high-temperature media, a condenser such as a buffer tube (coil) must be connected, and the operating temperature of the transmitter should not exceed the limit;
  6. The pressure guiding tube should be installed in a place with small temperature fluctuations;
  7. When freezing occurs in winter, it is necessary to take anti-freezing measures according to the transmitter installed outdoors to avoid the expansion of the liquid in the pressure port due to the freezing volume, leading to damage to the sensor;
  8. When wiring, pass the cable through the waterproof joint or flexible pipe and tighten the sealing nut to prevent rainwater, etc. from leaking into the transmitter housing through the cable;
  9. When measuring the liquid pressure, the installation position of the transmitter should avoid the impact of the liquid to avoid damage to the sensor due to overpressure.

Maintenance

High temperature melt transmitters are required to be checked once a week. Check every month. It is mainly to remove dust from the instrument. Carefully inspect electrical components. Always check the output current value. There is weak current inside the pressure transmitter. Be sure to keep it away from strong external electricity.

extrusion melt pressure transducer

In plastic and rubber extrusion production lines, melt pressure sensors play an important role in improving melt quality, improving production safety and protecting production equipment. At the same time, the high temperature melt pressure sensor is a very sensitive element. Only proper installation and maintenance can make it work to its fullest.

In the extrusion production process, some quality standards of the product (such as dimensional accuracy or the surface flatness of the parts added with mineral fillers, etc.) require optimal control of the extrusion pressure. Melt pressure sensor is an important element to achieve this requirement. By setting the melt pressure sensor and pressure control device at the mold inlet connection. It can make the product more stable and can reduce the waste of materials.

In addition, measuring the pressure across the screen and the melt pump is very important to ensure the safety of production and the optimal performance of the equipment. If the flow of the melt into the mold is blocked, a sensor under the screen will alert the operator (which can be done via a meter) to alert the operator.

When a sensor upstream of the filter sounds an alarm, it indicates that the pressure inside the extruder is too high, possibly causing excessive wear on the screw.
For manufacturers applying melt pumps, it is necessary to measure the inlet and outlet pressures of the melt medium. To ensure that the melt medium can continuously flow into the mold. Because of any obstruction, the melt pump may be blocked.

A pressure sensor equipped on an extrusion line can measure the pressure at only one point, or it can be a series of sensors used to measure the entire line.
Melt pressure sensor is connected with data recorder and sound alarm device. The processing parameters of the extruder can be adjusted using the processing control system.

Common faults of high temperature melt pressure sensor digital instruments

  1. High temperature melt pressure gauge with black screen. Make a preliminary judgment as to whether the 220v power supply line is faulty. The pressure gauge may burn out.
  2. Word skip appears on the pressure gauge. Preliminarily judge whether the connection of the signal line between the sensor and the pressure instrument is bad; whether the shield line is connected to the ground. There are interference signals at the scene. (Poor contact between the welding points inside the meter).
  3. The upper window of the meter displays —- or 0000. The signal cable between the sensor and the meter may be connected incorrectly. Or the sensor leads are broken.
  4. The pressure display on the upper window of the meter does not rise but decreases, which may be the damage of the sensor diaphragm.
  5. The pressure gauge functions normally, that is, the pressure cannot reach the target value. Check the sensor threads. Installing too shallow or too deep may cause it. Adjusting the torque to the normal range pressure shows normal;
  6. The high temperature melt pressure gauge shows a negative number. Cannot clear calibration. The high-temperature melt pressure gauge is subjected to an instantaneous strong current shock, which causes damage to the instrument protection components.

More Featured Pressure Transmitters

Frequently
Asked
Questions

Melt pressure transducers are common spares on extrusion lines to measure the pressure and/or temperature of materials in pipes. The design structure of the product is to stick the four strain gauges that make up the bridge circuit on the diaphragm at the other end of the capillary tube according to the principle of circular diaphragm compression.
During measurement, the melt presses the pressure-sensitive diaphragm, which transmits the pressure to the diaphragm at the other end through the filling medium. The diaphragm is deformed, and the strain is attached to the strain gauge.

Before the calibration operation, first, the Melt pressure transducers are stopped, second, the operating temperature is within the operating temperature, and third, the temperature compensation is adjusted to zero.

Melt pressure transducers are available in temperature compensated grades, which are selected based on the medium filled in the capillary tube in the sensor. The physical properties of the filling medium are directly related to the zero degree output level.

When assigning ranges with the meter, this value needs to be taken into account and adjustments made to compensate. A calibration adjustment acts like setting a balance, think of temperature compensation as the packaging of the item being weighed.

The temperature compensation for 3 different media is as follows:

  • Hg (mercury) = 15 psi/ 100°F or 27 psi/ 100°C
  • Oil = 36 psi/100°F or 65psi/100°C
  • NaK (Sodium Potassium) = 30 psi/ 100°F or 54psi/ 100°C

Example:
Process temperature = 200°C, mercury filled, signal output 60psi @ zero pressure

① According to the full scale pressure range of the sensor, this offset is outside the normal combined error specification. The pressure range is 10,000 psi, the combined error is 0.5%, and the compensation is actually 110 psi.
② Remember that when we perform calibration, there is no change to the signal output, only to ensure that the output is within the tolerance range of the specification.
③The design of the meter is easy to process calibration, and it only takes a few cases to test the high/low limit range of the output.

A pressure transmitter refers to a pressure sensor whose output is a standard signal, and is an instrument that accepts a pressure variable proportionally converted into a standard output signal. It can convert physical pressure parameters such as gas and liquid sensed by the load cell sensor into standard electrical signals. Measurement, indication and process adjustment are carried out by supplying secondary instruments such as indicating alarms, recorders and regulators.

If you want the pressure transmitter to be washable, you should consider installing the pressure transmitter on the barrel before the filter or before and after the melt pump or in the mold.

Points to note when cleaning the pressure transmitter:

All pressure transmitter connections should be removed before cleaning the body with a wire brush or detergent. Because these two cleaning methods may damage the diaphragm of the pressure transmitter and the insulation of the wiring.

When heated cleaning is required, the pressure transmitter should also be removed and the top wiped with a soft, non-abrasive cloth. At the same time, the holes of the pressure transmitter also need to be cleaned with soft tools.

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

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

There 4 main types of pressure sensors based on this: 

More about Industrial Pressure Sensors

Extended Reading: Electronic Pressure Switch for Air Compressor

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Sino-Inst is Manufacturer of Melt Pressure Transducers. We supply more than 20 kinds of Melt Pressure Transducers. 90% Melt Pressure Transducers are used for precise measurement and control of high temperature such as rubber, plastic, chemical fiber, polyester nylon, polyester, steam, etc.

Sino-Inst’s high temperature Melt Pressure Transducers are used in the pressure measurement of high temperature melt, fluid and gas medium in chemical fiber spinning, polyester rubber, plastic rubber and plastic, extrusion machinery, non-woven non-woven, construction packaging materials and other equipment.

High temperature melt pressure sensor is used for pressure measurement and control of high temperature fluid medium in chemical fiber spinning, polyester, rubber and plastic machinery and other equipment.

Melt Pressure Transducers enable stable pressure measurement with high temperature. This greatly meets the measurement needs of many applications.

Sino-Inst’s Melt Pressure Transducers, made in China, Having good Quality, With better price. Our pressure measurement instruments are widely used in China, India, Pakistan, the US, and other countries.

The entire team at Sino-Inst’s has received excellent training, so we can ensure that every client’s needs are met. For assistance with your product requirements, whether it’s a Melt Pressure Transducers, level sensor, or other device, give us a call.

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SI-702S Ultra High pressure transducer

High pressure transducer is used to measure high pressure up to 1500Mpa. Also called ultra high pressure transducer.

High pressure transducer adopts ultra high pressure design. Suitable for high pressure applications up to 15000bar. SI-702S series ultra high pressure pressure transducer can provide reliable ultra-high pressure measurement. Ultra high pressure transmitter adopts rare metal alloy material. After special process treatment, integrated design. All stainless steel welding package. Laser resistance temperature compensation. With high performance digital processing circuit. The factory has undergone high and low temperature aging and long-term fatigue tests. Good long-term stability. Ultra-long working life. Maintain safe and stable operation in the ultra-high pressure range.

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

More High Pressure Transducers:

Combined Pressure and Temperature Sensor-Dual function
High Temperature Pressure Sensor
Melt Pressure Sensors/Transducers – High Temperature
Gas Pressure Sensor
Flush diaphragm pressure sensor
Digital Pressure Sensor
Sanitary Pressure Transmitter
Pressure Transducer 4-20mA/Voltage

Features of SI-702s High pressure transducer

  • Pressure range: 0-1500MPa …. 0-2000MPa to 0-7000MPa (customized)
  • Accuracy level: 0.1% FS, 0.2% FS, 0.5% FS
  • All stainless steel structure
  • Internally generated calibration signal
  • Using high-voltage accessories
  • Protection class IP65

Maybe you just need high pressure pressure sensor: 0 ~ 40MPa… 600MPa.

Specifications of High pressure transducer

Pressure range: 0-1500MPa …. 0-2000MPa to 0-7000MPa (customized)
Comprehensive accuracy: 0.1% FS, 0.2% FS, 0.5% FS
Output signal: 4-20mA ( 2 wire system), 0-5 / 1-5 / 0-10VDC (3 wire system)
Power supply voltage: 24VDC (10-30VDC)
Medium temperature: -20 ~ 75 ℃
Ambient temperature: -20 ~ 75 ℃
Load resistance: Current output type: max. 800Ω; Voltage output type: greater than 50KΩ
Insulation resistance: Greater than 2000MΩ (100VDC
Sealing grade: IP65
Long-term stable performance: 0.1% FS / year
Vibration effect:Within the mechanical vibration frequency of 20Hz ~ 1000Hz, the output change is less than 0.1% FS
Electrical interface: Four-core aviation connector, Hessman connector optional
Thread interface: Ball head M20 × 1.5, cone head M20 × 1.5, M22 × 1.5, etc. Other threads can be designed according to customer requirements.

Ultra high pressure quick connector-1 / 4NPT 3 / 8NPT high pressure connector

Features: High-strength carbon steel. Galvanized surface treatment. Check valves at both ends. Steel ball lock. Interchangeable with ENERPAC / parker3000.
Thread: 1 / 4NPT. 3 / 8NPT
Working temperature: -30-100 ℃
Maximum working pressure: 10000psi (700bar)
Features: High-strength carbon steel, galvanized surface, check valves at both ends, steel ball lock, 2 times safety factor.
Product description: The HP high-pressure series is designed for use in high-pressure environments. All metal parts are made of steel. The base of the female connector is treated by QPQ. The base of the male connector is treated by all black galvanizing.

SI-702s High pressure transducers types

SI-702Q Ultra-High Pressure Sensor

SI-702Q Ultra High pressure transducer adopts spherical sealing method. It can choose 0-20mV, 4-20mA, 0-5VDC output. The ultra-high pressure pressure transmitter uses fully integrated rare alloy materials. Fine machining. Multiple heat treatment processes. Each sensor undergoes rigorous pressure testing to ensure absolute safety and reliability. The sensor has high accuracy, long-term stability, and long life specialty.

SI-702Z Ultra High Pressure Sensor

SI-702Z Ultra High pressure transducer is an extended product of 702S. It is characterized by a 58 degree outer cone seal. The ultra-high pressure structure and processing technology ensure the long-term reliability of the product. High accuracy, long life, and various electrical interfaces to choose from.

SI-702W Ultra High Pressure Sensor

SI-702W Ultra High pressure transducer, M20 × 1.5 external thread with 60 degree inner cone seal. Fine machining, multiple heat treatment processes. Each sensor undergoes rigorous pressure test and high and low temperature aging. It guarantees absolute safety and reliability. The sensor has the characteristics of high accuracy, good stability and long life. Various electrical interfaces are available.

SI-702N Ultra High Pressure Sensor

SI-702N Ultra High pressure transducer, M20 × 1.5 internal thread with 60 degree inner cone sealing method. Each sensor has undergone strict pressure test and aging. It guarantees absolute safety and reliability. It has high accuracy, long-term stability and long life. Features. A variety of shapes can be selected and a variety of electrical interfaces can be selected.

Applications of SI-702S Ultra High pressure transducer

SI-702S Ultra-High Pressure Transducer is designed for high pressure hydraulic circuit applications. The electronic components with excellent stability are selected and the voltage and current output signals are used. Therefore, SI-702S Ultra-High Pressure Senors is used in applications that require long-distance transmission signals or intelligent control and detection systems.

  • Construction of test platform
  • Water jet cutting
  • High-pressure pasteurization
  • High pressure cleaning
  • High voltage processor
  • Water cutting machinery
  • Hydraulic components
  • High-voltage systems, etc.

Technical Support

What is a high pressure transducer?

High pressure transducer is a pressure transmitter suitable for high pressure measurement and control.

Sino-Inst high pressure transducer has gone through thousands of fatigue impact tests and several days of low and medium temperature aging cycles before leaving the factory. It has solved the disadvantages of high pressure sensors in terms of stress and zero instability. Provide customers with reliable products for high voltage measurement. The pressure of SI-702 series can reach 600MPa. The precision level is high, and the mature production technology can ensure the long-term stability of the sensor with excellent characteristics. SI-702 series pressure sensors are suitable for oil extraction platforms, water flow equipment, high pressure measurement equipment, hydraulic control systems, test benches and industrial automation control.

More about high pressure transducer wikipedia.

FAQ

What does a pressure transducer do?

A pressure sensor (Pressure Transducer) is a transmitter that can sense pressure signals and convert them into usable output electrical signals according to certain rules.
The 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.

How do you test a pressure transducer?

Today I will mainly introduce three common detection methods for pressure sensors. Hope it helps everyone.
1. Pressure test. The method of detection is to power the sensor. Use your mouth to blow the air hole of the pressure sensor. Use the voltage file of a 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 obvious. If nothing has changed. You need to use a pneumatic source to apply pressure instead.
2. Zero point detection. Use the voltage file of a multimeter. Detect the zero output of the sensor under no pressure. This output is generally mV level voltage. If the technical specifications of the sensor are exceeded, the zero deviation of the sensor is out of range.
3. Detection of bridges. It mainly detects whether the circuit of the sensor is correct. It is generally a Wheatstone full-bridge circuit. Use the ohm file of the multimeter to measure the impedance between the input terminals and the impedance between the output terminals. These two impedances are the input and output impedances of the pressure sensor. If the impedance is infinite, the bridge is disconnected. It means there is a problem with the sensor or the definition of the pin is not correct.

How does a 3 wire pressure transducer work?

The output signal of the two-wire pressure transmitter is generally 4-20MA. The supply voltage is 24VDC. The two wires are a red (representing positive 24V power supply), and a black or blue (representing positive signal output). The wiring method is that the red wire is connected to the positive source and the blue wire is connected to the signal positive, and then the power supply negative and the signal negative are shorted.
The three-wire pressure transmitter is generally a voltage output. Wire one (red power supply is positive), one black (power supply is negative), and one yellow (signal output is positive). The output ground is common to the power supply.

Why shouldn’t you use a pressure transducer with high oxygen environment?

Oxygen plays an important role in the smelting process, chemical industry, national defense industry, and healthcare. However, the process of oxygen production and use is extremely prone to combustion and explosion.
The analysis is based on the mechanism of the “three elements” of combustion and explosion (combustible materials, oxidants, and excitation energy). The high-purity high-pressure oxygen transported in the oxygen pipeline is a very strong oxidant. The higher the purity, the higher the pressure, the stronger the oxidation, the more dangerous.
The potential sources of excitation energy for combustion or explosion are roughly the following: friction, compression heat, impact force, arc, resonance, etc.
In the construction of industrial oxygen pipelines, multiple cleaning processes such as derusting, scrubbing, sand blasting, blowing, degreasing, and acid cleaning should be carried out. Remove the oil and impurities in the pipeline to make it reach the condition of transporting oxygen medium. Check and accept according to relevant standards, and use it after passing the test.
For oxygen pressure measurement, choosing a clean instrument filled with inert oil not only improves the safety level, but also greatly reduces the risk of economic and time loss caused by maintenance or failure replacement.
Sino-Inst pressure sensor for oxygen measurement
Accuracy: ± 0.15% FS
Fill with Fluorolube® oil to ensure no oxidation reaction
Oil-free production process, oxygen-level cleaning process
Φ19mm standard OEM pressure / differential pressure sensor
Constant current / constant voltage power supply
All stainless steel 316L material

Sino-Instrument offers High pressure sensors. A wide variety of High Pressure sensors options are available to you. Such as free samples, paid samples. Sino-Instrument is a globally recognized manufacturer of High 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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SI-702 High Pressure Sensor

High pressure sensor is pressure transmitter designed for high pressure measure&control. 0 ~ 40MPa… 600MPa.

High pressure sensor elastic body adopts special material and integrated structure design. SI-702 high pressure sensor has no burst phenomenon during high voltage measurement and control. The high pressure sensor is used under high pressure, differential high pressure and high pressure shock conditions. High pressure sensors are suitable for pressure measurement & control of large hydraulic equipment. SI-702 high pressure sensor adopts spherical or cone seal to ensure the tightness of high voltage system. Such sensor also referred to as: high pressure pressure sensor, high pressure transmitter.

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

More High Pressure Sensors:

Combined Pressure and Temperature Sensor-Dual function
High Temperature Pressure Sensor
Melt Pressure Sensors/Transducers – High Temperature
Gas Pressure Sensor
Flush diaphragm pressure sensor
Digital Pressure Sensor
Sanitary Pressure Transmitter
Pressure Transducer 4-20mA/Voltage

Features of SI-702 High Pressure Sensor

  • Adopt resistance strain gauge pressure sensor chip. The selected patch technology has zero point, full scale compensation and temperature compensation;
  • High precision and high stability amplifier integrated circuit;
  • Micro-mechanical processing technology, integrated structure of measuring diaphragm and pressure interface. Impact resistance, fatigue resistance, high reliability;
  • Integrated design product will not rupture under pressure of 1100MPA, ensuring product safety
  • Diversified output signals (general-purpose analog output, digital RS485 / RS232 output, GPRS wireless transmission);
  • Small structure, minimum outer diameter can reach 26mm. Can be directly matched with local display meter (output is 4-20mA two-wire system);
  • Thread interface adopts 7 degree cone sealing surface;

Specifications of SI-702 High Pressure Sensor

Pressure typeGauge/ AbsolutePressure range 0-80,100,150,200,250,300MPa, …600MPa.
Precision ±0.1%FS   ±0.3%FS   ±0.5%FSZero temperature drift ±0.02%FS/℃
Sensitivity temperature drift ±0.02%FS/℃Long-term stability (1 year) ±0.1%FS
Response frequency (-3dB) 3.2KHzTemperature compensation -20~+85℃
Operating temperature -40~+125℃Storage temperature -40~+125℃
Overload pressure 150%FSDestruction pressure300% FS (limit pressure 10000bar)
Protection class IP65Material 17-4PH
Electrical connectionsDirect lead, M12 connector, Big Hessman, Little HessmanPressure connectionM20 × 1.5, G1 / 2 (others are customized according to requirements)
Signal output 4~20mA 0.5~4.5VDC
(Proportional output)
 0.5~4.5VDC 0~5VDC 0-10VDC
Signal cable specifications 2 Wire 3 Wire 3 Wire 3 Wire 3 Wire
Supply voltage 9~30VDC 5VDC 9~30VDC 9~30VDC 15~30VDC

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

Applications of SI-702 High Pressure Sensor

  • Pressure measurement of large hydraulic machinery and hydraulic stations;
  • Pressure measurement and control of water jet cutter and ceramic wire cutter;
  • Pressure measurement of high pressure water pump and high pressure oil pump;
  • Supporting heavy equipment
  • high pressure
  • High load
  • High impact
  • Frequently overloaded areas

Extended Reading: Digital Pressure Sensor-RS485

Dimensions of High pressure sensors

What is High Pressure Sensor?

High pressure transducer is a pressure transmitter suitable for high pressure measurement and co

A high pressure sensor is a device for high pressure measurement of gases or liquids. A high pressure sensor usually acts as a transducer; it generates a signal as a function of the pressure imposed. Such a signal is electrical 4-20mA, 0-5V,etc.

High Pressure sensors are used for control and monitoring in thousands of everyday applications. High Pressure sensors can also be used to indirectly measure other variables such as fluid/gas flow, speed, water level, and altitude. High Pressure sensors can alternatively be called High pressure transducers, High pressure transmitters, High pressure senders, High pressure indicators, piezometers and manometers, among other names.

Sino-Inst high pressure sensor has gone through thousands of fatigue impact tests and several days of low and medium temperature aging cycles before leaving the factory. It has solved the disadvantages of high pressure sensors in terms of stress and zero instability. Provide customers with reliable products for high voltage measurement. The pressure of SI-702 series can reach 600MPa. The precision level is high, and the mature production technology can ensure the long-term stability of the sensor with excellent characteristics. SI-702 series pressure sensors are suitable for oil extraction platforms, water flow equipment, high pressure measurement equipment, hydraulic control systems, test benches and industrial automation control.

You may like: How does a pressure transmitter work?

Technical Support

High Temperature Pressure Sensor

High Temperature Pressure Sensor with high temperature resistant pressure core or sapphire core as pressure measurement material. After high reliability amplifier circuit and precise temperature compensation. The absolute or gauge pressure of the measured medium is converted into standard electrical signals such as 4 ~ 20mA, 0 ~ 5VDC, 0 ~ 10VDC. It is also widely used in industry. Collect pressure signals at the points of some high-temperature steam and fluid pipes.

How do you use a pressure sensor?

1. The key points in the use of pressure sensors and the correct installation position of the transmitter on the process pipeline are related to the measured medium. Only by mastering the correct use of the pressure sensor can the best measurement results be obtained!

2. Prevent the transmitter from coming into contact with corrosive or hot media.

3. Prevent dross from depositing in the duct.

4. When measuring liquid pressure, the pressure taking port should be opened on the side of the process pipeline to avoid sedimentation.

5. When measuring the gas pressure, the pressure taking port should be opened at the top of the process pipeline. The transmitter should also be installed at the top of the process pipeline so that the accumulated liquid can be easily injected into the process pipeline.

6. The pressure guiding tube should be installed in a place with small temperature fluctuations.

7. When measuring steam or other high-temperature media, a condenser such as a buffer tube (coil) must be connected. The transmitter’s operating temperature should not exceed the limit.

Q&A

What is pressure sensor and how it works?

pressure sensor is a device for pressure measurement of gases or liquids.  Pressure sensors can also be used to indirectly measure other variables such as fluid/gas flow, speed, water level, and altitude. Pressure sensors can alternatively be called pressure transducerspressure transmitterspressure senderspressure indicatorspiezometers, and manometers, among other names.
In short, a pressure sensor converts pressure into a small electrical signal, which is sent and displayed. Therefore, these are also commonly referred to as pressure transmitters. Two common signals used are 4 to 20 mA signals and 0 to 5-volt signals.
Most pressure sensors work using the piezoelectric effect. This is when the material generates a charge in response to stress. This stress is usually compressive, but may be twisted, bent, or vibrated.
Pressure sensors detect pressure and can determine the amount of pressure by measuring the charge.
The pressure sensor needs to be calibrated in order to know what voltage or milliamp (mA) signal corresponds to what pressure. This is the basic “zero” and “span” calibration or minimum and maximum, which is a common job for maintenance personnel.
Read more about: What is a pressure sensor and how it works? 

What does a barometric pressure sensor do?

Air pressure sensor is an instrument used to measure the absolute pressure of gas. Air pressure sensor is mainly suitable for physical experiments related to gas pressure. It can also measure dry, non-corrosive gas pressure in biological and chemical experiments.
The main sensing element of the air pressure sensor of the air compressor is a thin film that is sensitive to the pressure of the air pressure and a thimble opening control. In the circuit, it is connected with a flexible resistor. When the pressure of the measured gas decreases or increases, the thin film deforms to drive the ejector pin, and the resistance of the resistor will change. The resistance of the resistor changes. The signal voltage of 0-5V is obtained from the sensing element, and is received by the data collector after A / D conversion, and then the data collector transmits the result to the computer in an appropriate form.
The main component of many air pressure sensors is a variable-capacitance silicon capsule. When the external atmospheric pressure of the variable-capacitance silicon membrane box changes, the thimble moves, and the single crystal silicon membrane box elastically deforms with it, thereby causing a change in the capacitance of the parallel plate capacitor of the silicon membrane box to control the air pressure sensor.
More about Gas Pressure Sensor.

What are pressure sensors made of?

The pressure sensor is a device that detects pressure and converts the pressure signal into an electrical signal and outputs it linearly. Common types include strain gauge, piezoresistive, capacitive, piezoelectric, and vibration frequency pressure sensors.
We use strain gauge pressure sensors as an introduction. It is mainly composed of 4 parts: elastomer, strain gauge, measuring circuit and transmission cable.
Strain gauge pressure sensor measurement principle: When the pressure sensor elastic body is deformed under the action of external force. The strain gauge attached to the elastic body then bends. The resistance of the strain gauge changes. Then the measurement circuit converts the change in resistance into an electrical signal (usually a millivolt signal).
Elastomer: Elastomer is the pressure sensor shell. The main materials are aluminum alloy, alloy steel and stainless steel.
Strain gauge: The strain gauge pressure is an important part of the sensor. Commonly used strain gauge base material adopts polymer film material. The strained material is usually high-purity constantan. The strain gauge is attached to the elastic body through dehydration. The elastic body is deformed by force. The strain gauge then deforms. Thereby changing the resistance value.
Measurement circuit: Transform the resistance change of the strain gauge into a millivolt signal output through the Wheatstone bridge.
Transmission cable: 4-core shielded cable with four wires of red, black, green and white. Red: Power +. Black: Power-. Green: signal +. White: Signal-.

What is the difference between pressure switch and pressure sensor?

Pressure Switch:
As the name suggests, a pressure switch is a switch. It’s just that this switch is the pressure set in advance. When the measured medium reaches this pressure level, the switch can automatically turn on or off. The pressure switch must be given a pressure value in advance. Then turn the switch on or off. They are used for simple control and are all digital outputs.
Pressure Sensor:
The pressure sensor can output not only analog signals but also digital signals. Digital signal processing is more convenient, and remote transmission is also possible. The pressure sensor is composed of a pressure sensitive element and a conversion circuit. Use the pressure of the measured medium to produce a small change in current or voltage output on the pressure sensitive element.

Sino-Inst offers High pressure sensors. A wide variety of High Pressure sensors options are available to you. Such as free samples, paid samples. Sino-Instrument is a globally recognized manufacturer of High Pressure sensors, located in China. Sino-Inst 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