Pressure Sensors

Pressure sensors are devices that sense the applied pressure of gases or liquids. The output of the measurement is then converted into an electrical signal which reflects the amount of pressure applied.


There are various different technologies used within pressure sensors. Depending on the requirements, this can influence their sensing accuracy and reliability. When the mechanical displacement within the sensor is turned into an electrical output signal there are 5 ways this can happen.


Resistive - These types of sensors use the change in electrical resistance of a strain gauge connected to the diaphragm.


Capacitive - Are highly sensitive and are able to measure low-pressure under 10 bar while still withstanding large overloads.


Piezoelectric - These sensors use substances like Quartz to generate a charge on the surface when pressure is applied. Piezoelectric pressure sensors are ideal for measuring fast changing pressures.


Optical - These use interferometry to measure pressure changes in optical fibre. They are not disturbed by EMI and can be used in noisy or medical environments.


MEMS - This stands for micro-electro-mechanical system and contains capacitive or piezo pressure sensing mechanisms on silicon at micron level resolution.


Types of Pressure Sensors


Within the sensors, there are various properties which can be used to classify them. This includes what pressure range they measure, their operating temperature range or the pressure type they measure.


Absolute Pressure Sensor - This type of sensor measures pressure relative to the perfect vacuum (zero reference point).


Gauge Pressure Sensors - These are often used to measure atmospheric pressure and are sometimes referred to as relative pressure sensors.


Sealed Gauge Pressure Sensor - Similar to a gauge pressure sensor except they measure pressure relative to a fixed pressure, not the current ambient atmospheric pressure which can vary.


Differential Pressure Sensors - These can be used to measure the difference between two different pressures (differential pressure) which can be connected to either side of the sensor. They are often used to measure pressure drops, fluid levels and flow rates.


Pressure Sensor Applications


Pressure sensors are used in many applications in a large range of industries. These include medical, aviation, automotive and marine.


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รายละเอียดสินค้า / Description ราคา / Price Pressure Reading Type Minimum Pressure Reading Maximum Pressure Reading Accuracy Output Type Media Measured Process Connection Analogue Output Electrical Connection Communication Protocol Response Time Maximum Current Supply Voltage Interface
RS Stock No. 123-5238
Brand :RS PRO
THB17,159.18
Each
Units
Relative 0bar 25bar ±0.25 % Analogue Air, Hydraulic Fluid, Liquid, Non-Aggressive Gas, Oil, Water G1/4 0 → 5 V, 4 → 20 mA Wireless - - - - -
RS Stock No. 828-5773
Brand :RS PRO
THB7,305.91
Each
Units
Relative 0bar 100bar <±0.25 % Current Sewage, Viscous Fluid, Water G3/4 4 → 20 mA M12 Connector - - 28 mA 9 → 32 V dc -
RS Stock No. 175-5048
Brand :RS PRO
THB5,075.57
Each
Units
Relative 0psi 3600psi ±0.25 % Analogue - NPT 1/4 4 → 20 mA M12 Connector - - 20 mA 9 → 32 V dc -
RS Stock No. 797-5052
Brand :RS PRO
THB6,397.27
Each
Units
Relative 0bar 25bar ±0.25 % Voltage Air, Gas, Hydraulic Fluid, Liquid, Water G1/4 0 → 100 mV DIN 43650 Type C - - - 3 → 12 V dc -
RS Stock No. 797-5005
Brand :RS PRO
THB6,733.95
Each
Units
Relative 0bar 100bar ±0.25 % Voltage Air, Gas, Hydraulic Fluid, Liquid, Water G1/4 0 → 5 V DIN 43650 Type C - - - 9 → 32 V dc -
RS Stock No. 828-5820
Brand :RS PRO
THB7,413.43
Each
Units
Absolute 0bar 1bar <±0.25 % Current Sewage, Viscous Fluid, Water G3/4 4 → 20 mA M12 Connector - - 28 mA 9 → 32 V dc -
RS Stock No. 175-5041
Brand :RS PRO
THB5,075.57
Each
Units
Relative 0psi 100psi ±0.25 % Analogue - NPT 1/4 0 → 5 V M12 Connector - - - 9 → 32 V dc -
RS Stock No. 175-4989
Brand :RS PRO
THB5,075.57
Each
Units
Relative 0bar 100bar ±0.25 % Analogue - G1/4 0 → 5 V M12 4-pin - - - 9 → 32 V dc -
RS Stock No. 797-5027
Brand :RS PRO
THB6,733.95
Each
Units
Relative 0bar 40bar ±0.25 % Current Air, Gas, Hydraulic Fluid, Liquid, Water G1/4 4 → 20 mA DIN 43650 Type C - - 20 mA 9 → 32 V dc -
RS Stock No. 175-5028
Brand :RS PRO
THB7,354.96
Each
Units
Relative 0psi 15psi ±0.25 % Analogue - NPT 1/4 4 → 20 mA M12 Connector - - 20 mA 9 → 32 V dc -
RS Stock No. 175-4986
Brand :RS PRO
THB5,075.57
Each
Units
Relative 0bar 10bar ±0.25 % Analogue - G1/4 0 → 5 V M12 4-pin - - - 9 → 32 V dc -
RS Stock No. 123-5245
Brand :RS PRO
THB17,377.37
Each
Units
Relative 0bar 0.25bar ±0.25 % Analogue Air, Hydraulic Fluid, Liquid, Non-Aggressive Gas, Oil, Water G1/4 0 → 5 V, 4 → 20 mA Wireless - - - - -
RS Stock No. 175-4993
Brand :RS PRO
THB5,075.57
Each
Units
Relative 0bar 25bar ±0.25 % Analogue - G1/4 0 → 5 V M12 4-pin - - - 9 → 32 V dc -
RS Stock No. 828-5782
Brand :RS PRO
THB9,617.84
Each
Units
Relative 0bar 0.1bar <±0.25 % Voltage Sewage, Viscous Fluid, Water G3/4 0 → 10 V M12 Connector - - 6 mA 14 → 32 V dc -
RS Stock No. 828-5732
Brand :RS PRO
THB8,155.08
Each
Units
Relative 0bar 0.75bar <±0.25 % Current Oil, Water G1/4 4 → 20 mA DIN 43650 Type A - - 28 mA 9 → 32 V dc -
RS Stock No. 175-5018
Brand :RS PRO
THB11,608.38
Each
Units
Relative 0psi 1psi ±0.25 % Analogue - NPT 1/4 4 → 20 mA M12 Connector - - 20 mA 9 → 32 V dc -
RS Stock No. 175-5003
Brand :RS PRO
THB5,698.94
Each
Units
Relative -1bar 9bar ±0.25 % Analogue - G1/4 4 → 20 mA M12 4-pin - - 20 mA 9 → 32 V dc -
RS Stock No. 175-5016
Brand :RS PRO
THB7,354.96
Each
Units
Relative 0bar 1bar ±0.25 % Analogue - G1/4 4 → 20 mA M12 Connector - - 20 mA 9 → 32 V dc -
RS Stock No. 175-5029
Brand :RS PRO
THB8,196.83
Each
Units
Relative 0psi 15psi ±0.25 % Analogue - NPT 1/4 0 → 5 V M12 Connector - - - 9 → 32 V dc -
RS Stock No. 175-4982
Brand :RS PRO
THB5,698.94
Each
Units
Relative -1bar 24bar ±0.25 % Analogue - G1/4 0 → 5 V M12 4-pin - - - 9 → 32 V dc -
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