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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Description Price Pressure Reading Type Minimum Pressure Reading Maximum Pressure Reading Accuracy Output Type Media Measured Calibrated Process Connection Analogue Output Electrical Connection Response Time Maximum Current Supply Voltage Interface
RS Stock No. 286-664
Mfr. Part No.26PCCFA6G
BrandHoneywell
£26.51
Each
Units
Gauge 0psi 15psi ±0.25 % Unamplified Nitrogen Gas, Oxygen - - 97 → 103 mV PCB 1 ms - 10 V dc -
RS Stock No. 398-7051
Mfr. Part No.0166411031043
BrandSuco
£23.95
Each
Units
- 10bar 20bar - Relay Air, Heating Oil, Hydraulic Fluid, Turpentine - G1/4 - Spade Terminal - - 42 V -
RS Stock No. 914-8322
Mfr. Part No.DP-101A-M-P
BrandPanasonic
£86.82
Each
Units
Gauge -100kPa 100kPa - PNP Non-Corrosive Gas - G1/8 1 5 V dc, 4 20 mA Wire Lead 5000 ms 100 mA 12 24 V dc -
RS Stock No. 235-5829
Mfr. Part No.24PCCFA6G
BrandHoneywell
£27.52
Each
Units
Gauge 0psi 15psi 0.2 % Unamplified Nitrogen Gas, Oxygen, Water - - 165 → 285 mV Solder Tag 1 ms - 10 V dc -
RS Stock No. 302-5844
Mfr. Part No.XMLA020A2S11
£128.00
Each
Units
Differential 1bar 20bar 2 % Relay Air, Fresh Water, Hydraulic Fluid, Sea Water - G1/4 - PG13.5 Cable Gland - 3 A ac, 100 mA dc 120 240 V ac, 250 V dc -
RS Stock No. 922-7324
Mfr. Part No.MPX5010DP
BrandNXP
£7.369
Each (In a Tray of 20)
Units
Differential 0kPa 10kPa ±5 % Analogue Air, Fluid - - 4.7 V PCB Mount 1 ms - 4.75 5.25 V dc -
RS Stock No. 719-1080
Mfr. Part No.MPX5010DP
BrandNXP
£8.11
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 455-4646
Mfr. Part No.3100B0025G01B000
£96.50
Each
Units
- 0bar 25bar 0.25 % - Air Fluid, Hydraulic Fluid, Hydraulic Oil, Oil - G1/4 4 20 mA DIN 43650 Type C - - 10 36 V dc -
RS Stock No. 235-5807
Mfr. Part No.24PCBFA6G
BrandHoneywell
£27.51
Each
Units
Gauge 0psi 5psi 0.2 % Unamplified Nitrogen Gas, Oxygen, Water - - 85 → 145 mV Solder Tag 1 ms - 10 V dc -
RS Stock No. 746-3672
Mfr. Part No.X5072-TB-A2-CA-H1-PA 0.8 to 1.2 bar B
BrandDruck
£259.79
Each
Units
Absolute 0.8bar 1.2bar ±0.1 % Analogue Fluid - G1/4 4 20 mA DIN 43650 Type A 10 ms 20 mA 7 28 V -
RS Stock No. 313-5301
Mfr. Part No.14X1SA1GV1
BrandVega
£184.23
Each
Units
Gauge 0bar 0.1bar 0.3 % - Fluid, Gas, Vapour - G1/2 4 20 mA DIN 43650 Connector - - 12 36 V dc -
RS Stock No. 609-6934
Mfr. Part No.XMLA035A2S11
£125.00
Each
Units
Differential 1.5bar 35bar 2 % Relay Air, Fresh Water, Hydraulic Fluid, Sea Water - G1/4 - PG13.5 Cable Gland - 3 A ac, 100 mA dc 120 240 V ac, 250 V dc -
RS Stock No. 455-4551
Mfr. Part No.22ISBGB1000ABUA001
£217.00
Each
Units
Gauge 0bar 10bar 0.25 % Analogue Fluid, Gas - BSP 1/4 4 20 mA DIN 43650 Type A - - 7 35 V dc -
RS Stock No. 177-5943
Mfr. Part No.SCX01DN
BrandHoneywell
£101.846
Each (In a Box of 25)
Units
Differential 0psi 1psi ±1 % Wheatstone Bridge Pneumatic Fluid - - 0 → 18 mV Solder Tag 100 μs - 20 V dc -
RS Stock No. 455-5065
Mfr. Part No.SCX01DN
BrandHoneywell
£103.58
Each
Units
Differential 0psi 1psi ±0.1 % Unamplified Pneumatic Fluid - - 17.82 → 18.18 mV Solder Tag 100 ms - 20 V dc -
RS Stock No. 313-5317
Mfr. Part No.14X1AA1GV1
BrandVega
£184.23
Each
Units
Gauge 0bar 1bar 0.3 % - Fluid, Gas, Vapour - G1/2 4 20 mA DIN 43650 Connector - - 12 36 V dc -
RS Stock No. 719-1043
Mfr. Part No.MPX2202A
BrandNXP
£6.89
Each
Units
Absolute 0kPa 200kPa ±1 % - Air - - 38.5 41.5 mV PCB Mount 1 ms - 10 V dc -
RS Stock No. 835-3927
Mfr. Part No.PU5404
£99.54
Each
Units
Relative 0bar 10bar ±0.5 % Analogue Gas, Liquid - G1/4 0 10 V M12 Connector 1 ms - 16 36 V dc -
RS Stock No. 169-0627
Mfr. Part No.MPX2202A
BrandNXP
£6.736
Each (In a Tray of 25)
Units
Absolute 0kPa 200kPa ±1 % - Air - - 38.5 → 41.5 mV PCB Mount 1 ms - 10 V dc -
RS Stock No. 896-8430
Mfr. Part No.3500B0001G01E000
£92.90
Each
Units
Gauge - 1bar 0.25 % Current Air, Gas, Water - G1/4 4 20 mA M12 Connector - - 10 30 V dc -
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