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 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 - Like 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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Description Price Pressure Reading Type Minimum Pressure Reading Maximum Pressure Reading Accuracy Output Type Media Measured Calibrated Process Connection Analogue Output Electrical Connection Communication Protocol Response Time Maximum Current Series
RS Stock No. 455-4696
Mfr. Part No.3100B0400S01B000
kr 1 369,80
Each
Units
Gauge 0bar 400bar 0.25 % Analogue Air Fluid, Hydraulic Fluid, Hydraulic Oil, Oil - G1/4 4 → 20 mA DIN 43650 Type C - 1 ms - -
RS Stock No. 123-5542
Mfr. Part No.3100B0010G01B000
kr 2 228,80
Each
Units
Gauge 0bar 10bar 0.25 % Analogue - RSCAL G1/4 4 → 20 mA DIN 43650 Type C - 1 ms - -
RS Stock No. 455-4624
Mfr. Part No.3100B0010G01B000
kr 1 369,80
Each
Units
Gauge 0bar 10bar 0.25 % Analogue Air Fluid, Hydraulic Fluid, Hydraulic Oil, Oil - G1/4 4 → 20 mA DIN 43650 Type C - 1 ms - -
RS Stock No. 125-3729
Mfr. Part No.7MF1567-3DA00-1AA1
BrandSiemens
kr 1 815,52
Each
Units
Relative 0bar 100bar 0.25 % Analogue Aggressive Media, Gas, Liquid, Non-Aggressive Media, Vapour - G1/2 4 → 20 mA DIN EN 175301 Connector, M16 - <5 ms 20 mA -
RS Stock No. 772-9907
Mfr. Part No.XMPA12B2131
kr 511,46
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 124-1467
Mfr. Part No.46879447
BrandWIKA
kr 5 210,13
Each
Units
- 0psi 14.22psi 0.5 % Analogue Liquid - - 4 → 20 mA PUR Cable (15 metres) - - - LS-10
RS Stock No. 455-4747
Mfr. Part No.3100B2200S2TB000
kr 1 369,80
Each
Units
Gauge 0bar 2200bar 0.25 % Analogue Air Fluid, Hydraulic Fluid, Hydraulic Oil, Oil - M12 4 → 20 mA DIN 43650 Type C - 1 ms - -
RS Stock No. 124-2130
Mfr. Part No.XMLA070D2C11
kr 1 744,75
Each
Units
Differential 2 (Falling) bar, 5 (Rising) bar 62.5 (Falling) bar, 70 (Rising) bar <2 (Repeat) % 1CO Hydraulic Oil - G1/4 - DIN43650 Male 4-Pin Connector - - 3 A -
RS Stock No. 124-1464
Mfr. Part No.46879445
BrandWIKA
kr 5 210,13
Each
Units
- 0psi 8.5psi 0.5 % Analogue Liquid - - 4 → 20 mA PUR Cable (15 metres) - - - LS-10
RS Stock No. 667-0917
Mfr. Part No.40PC150G2A
BrandHoneywell
kr 1 116,38
Each
Units
Relative 0psi 150psi 0.8 % Amplified Gas - - 0.5 mA PCB - 1 ms - -
RS Stock No. 177-5942
Mfr. Part No.40PC150G2A
BrandHoneywell
kr 1 059,364
Each (In a Tray of 10)
Units
Relative 0psi 150psi ±0.2 % Amplified Gas - - 0.5 → 4.5 V PCB - 1 ms 10 mA -
RS Stock No. 423-3715
Mfr. Part No.404366/000-460-405-504-20-61/000
BrandJumo
kr 2 930,71
Each
Units
Relative 0bar 16bar 0.2 % - Fluid, Gas - G1/2 4 → 20 mA DIN 43650 Type A - - - -
RS Stock No. 124-2164
Mfr. Part No.XMPA06B2131C
kr 415,75
Each
Units
Differential 0.2 (Falling) bar, 1 (Rising) bar 4.8 (Falling) bar, 6 (Rising) bar <3.5 (Repeat) % 2NC Air, Fresh Water, Sea Water - G1/4 - Screw Clamp - - - -
RS Stock No. 896-8535
Mfr. Part No.3500R0006G01B000
kr 1 410,13
Each
Units
Relative - 6bar 0.25 % Voltage Air, Gas, Water - G1/4 0 → 5 V DIN 43650 Type C - - - -
RS Stock No. 424-5752
Mfr. Part No.404366/000-460-405-504-20-61/000
BrandJumo
kr 3 034,21
Each
Units
Relative 0bar 16bar 0.5 % Analogue Fluid, Gas - G1/2 4 → 20 mA DIN 43650 Type A - - - -
RS Stock No. 430-9856
Mfr. Part No.401001/000-461-405-502-20-601-61/000
BrandJumo
kr 1 731,92
Each
Units
Absolute 0bar 25bar 0.5 % - Fluid, Gas - G1/4 4 → 20 mA DIN 43650 Type A - 3 ms - -
RS Stock No. 398-7067
Mfr. Part No.0166415031059
BrandSuco
kr 352,12
Each
Units
- 20bar 50bar - Relay Air, Heating Oil, Hydraulic Fluid, Turpentine - G1/4 - Spade Terminal - - - 01664
RS Stock No. 186-012
Mfr. Part No.401050/000-455-405-593-68-601-36/000
BrandJumo
kr 3 415,58
Each
Units
Differential 0bar 1.6bar - - Fluid, Gas - G1/8 4 → 20 mA M12 Connector - - - -
RS Stock No. 398-6991
Mfr. Part No.0184458031042
BrandSuco
kr 746,43
Each
Units
- 1bar 10bar - Relay Air, Heating Oil, Hydraulic Fluid, Turpentine - G1/4 - DIN 43650 Type A - - 4 A 0184
RS Stock No. 448-8101
Mfr. Part No.0184458031-SS
BrandSuco
kr 1 190,96
Each
Units
- 1bar 10bar - Relay Air, Heating Oil, Hydraulic Fluid, Turpentine - G1/4 - DIN 43650 Type A - - 4 A 0184