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 Supply Voltage
RS Stock No. 162-2086
Mfr. Part No.XMLP1K0PD230
£125.00
Each
Units
Differential 0psi 1000psi ±0.5 % Analogue Air, Fresh Water, Gas, Hydraulic Oil, Refrigeration Fluid - - 4 → 20 mA 4-Pin Male Connector - 2 ms 20 mA 12 → 24 V dc
New
RS Stock No. 206-7032
Mfr. Part No.PP - 222 B5J
BrandVega
£268.00
Each
Units
Relative -1bar 60bar 0.3 % Analogue Gas, Vapour - - - - - - - 35 V
RS Stock No. 136-5076
Mfr. Part No.3200B0060G05BR00
£100.50
Each
Units
Relative 0bar 60bar 0.5 % Analogue Air Fluid, Hydraulic Fluid, Hydraulic Oil, Oil - G1/4 4 → 20 mA 9.4 mm DIN Connector - 1 ms 2 (Sink & Source) mA 8 → 30 V dc
RS Stock No. 177-8881
Mfr. Part No.XMLP2D5GC21F
£100.00
Each
Units
- 0bar 2.5bar ±0.5 % Analogue Air, Fresh Water, Gas, Hydraulic Oil - - 4 → 20 mA 3 Pin Male Connector - <=2 ms 23 mA 12 → 24 V dc
New
RS Stock No. 210-2329
Mfr. Part No.NPA-730B-05WG
£28.69
Each
Units
Gauge 0.18psi 5psi ±1.5 % Digital Gas - - - - - - - 3.3 V
RS Stock No. 136-5037
Mfr. Part No.3100B0060G01E000
£94.00
Each
Units
Relative 0bar 60bar 0.25 % Analogue Air Fluid, Hydraulic Fluid, Hydraulic Oil, Oil - G1/4 4 → 20 mA 4-Pin M12 x 1 Connector - 1 ms 2 (Sink & Source) mA 8 → 30 V dc
RS Stock No. 200-6101
Mfr. Part No.325540009-50
£11.073
Each (On a Reel of 1000)
Units
- - - - - - - - - - - - - -
New
RS Stock No. 213-3334
Mfr. Part No.PBS2-RB250SG2SS0NMA0Z
BrandSick
£283.80
Each
Units
Relative 0bar 250bar <±0.5 % PNP/NPN-NO/NC + Current/Voltage Air, Gas, Hydraulic Fluid, Liquid, Oil, Water - - 4-20mA / 0-10V M12 Connector IO-LINK 5 ms 600 mA 15 - 35 V
RS Stock No. 197-6895
Mfr. Part No.MPRLS0015PG00001A
BrandHoneywell
£5.81
Each
Units
Gauge 0psi 15psi ±0.25 %FSS BFSL Transistor Gas, Liquid - - - - - - - 3.6 V
RS Stock No. 146-2937
Mfr. Part No.XMLPM00GC71F
£98.80
Each
Units
Differential -1bar 0bar 0.1 % Analogue Air, Fresh Water, Gas, Hydraulic Oil - - 0 → 10 V 3-Pin DIN 43650 Male Connector - ≤2 ms <7 mA 24 V dc
New
RS Stock No. 213-2731
Mfr. Part No.MLH010BGB06A
BrandHoneywell
£120.16
Each
Units
Relative - 10bar ±0.25% Ratiometric Gas, Liquid, Oil - - - - - - - 24 V
New
RS Stock No. 213-3342
Mfr. Part No.PBT-RB010SGESS0AMA0Z
BrandSick
£107.84
Each
Units
Relative 0bar 10bar <±1 % Current Air, Gas, Hydraulic Fluid, Liquid, Oil, Water - G 1/2 4-20 mA M12 Connector - <4 ms 25 mA 8 - 30 V
RS Stock No. 190-9716
Mfr. Part No.9023526
BrandWIKA
£342.17
Each
Units
- 0bar 40bar ±0.5 % Current Adhesive, Contaminated Media, Crystallising, Particle-Laden, Paste-Like, Viscous - G1/2 4 → 20 mA Angular connector DIN 175301-803 A - - 20 mA 10 → 30 V dc
New
RS Stock No. 206-7042
Mfr. Part No.PP - 222 268
BrandVega
£337.00
Each
Units
Relative -1bar 60bar 0.3 % Analogue Gas, Vapour - - - - - - - 35 V
New
RS Stock No. 213-3358
Mfr. Part No.PFT-FRB010SF2OSSAMSSZ
BrandSick
£311.23
Each
Units
Relative 0bar 10bar <±0.5 % Current Air, Gas, Hydraulic Fluid, Liquid, Oil, Water - - 4-20 mA M12 Connector - 1 ms 25 mA 10 - 30 V
RS Stock No. 176-7908
Mfr. Part No.XMLP200PP230
£86.53
Each
Units
- 0psi 200psi 0.1 %, ±0.5 (Measurement) % Analogue Air, Fresh Water, Gas, Hydraulic Oil, Refrigeration Fluid - - 4 → 20 mA 3 Pin Male Connector - ≤2 ms 23 mA 12 → 24 V dc
RS Stock No. 136-5087
Mfr. Part No.3200B0250S05ER00
£96.00
Each
Units
Relative 0bar 250bar - Analogue Air Fluid, Hydraulic Fluid, Hydraulic Oil, Oil - G1/4 4 → 20 mA 4-Pin M12 x 1 Connector - 1 ms 2 (Sink & Source) mA 8 → 30 V dc
RS Stock No. 136-5994
Mfr. Part No.836P-D2GFGC10PA-D4
£293.00
Each
Units
Relative - - ±1 % Analogue, PNP Gas, Liquid, Steam - G1/4 4 → 20 mA 4-Pin M12 DC Micro Connector IO-LINK - 450 mA 15 → 35 V dc
RS Stock No. 177-8848
Mfr. Part No.XMEP100BT11F
£117.00
Each
Units
- 0bar 100bar ±0.5 % Analogue Air, Fresh Water, Hydraulic Oil - G1/4 0.5 → 4.5 V 3 Pin DEUTSCH Connector DT04-3P - <=2 ms 7 mA 5 V dc
RS Stock No. 176-7865
Mfr. Part No.XMLP025BC270
£96.00
Each
Units
- 0bar 25bar 0.1 %, ±0.5 (Measurement) % Analogue Air, Fresh Water, Gas, Hydraulic Oil, Refrigeration Fluid - 7/16 - 20 UNF SAE 4 → 20 mA EN 175301-803-A 3 Pin Male Connector - ≤2 ms 23 mA 12 → 24 V dc