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 Process Connection Analogue Output Electrical Connection Communication Protocol Response Time Maximum Current Series Supply Voltage
RS Stock No. 828-5745
BrandRS PRO
$264.47
Each
units
Relative 0bar 16bar <±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. 922-7409
Mfr. Part No.MPXV5010DP
BrandNXP
$27.964
Each (In a Tray of 25)
units
Differential 0bar 10kPa ±5 % Analogue Air, Fluid - 4.7 V PCB Mount - 1 ms - - 4.75 → 5.25 V dc
RS Stock No. 836-8966
Mfr. Part No.ADP42510
BrandPanasonic
$29.13
Each
units
Relative - - ±0.3 % Voltage Air, Fluid - 100±40 mV PCB - - 1.5 mA - -
RS Stock No. 374-8806
Mfr. Part No.787266
BrandBurkert
$52.48
Each
units
Differential 3bar 16bar - Relay Air, Hydraulic Fluid, Oil Emulsion, Water G1/4 - Spade Terminal - - - Type 1045 -
RS Stock No. 739-6783
Mfr. Part No.PBT-RB250SG1SSNAMA0Z
BrandSick
$213.18
Each
units
Relative 0bar 250bar ±0.5 % Analogue Fluid, Gas G1/4 4 → 20 mA M12 Connector - 4 ms 25 mA - 8 → 30 V dc
RS Stock No. 124-2165
Mfr. Part No.XMPA06B2133NS1
$174.90
Each
units
Differential 1bar 6bar ±0.5 % 2 N/C - G1/4 - Screw Terminals - - - - -
RS Stock No. 169-8085
Mfr. Part No.ADP42510
BrandPanasonic
$26.483
Each (In a Tube of 100)
units
Relative - - ±0.3 % Voltage Air, Fluid - 100±40 mV PCB - - 1.5 mA - -
RS Stock No. 125-1274
Mfr. Part No.PN3071
$710.43
Each
units
Relative 0bar 250bar ±0.5 % Analogue + PNP-NO/NC Programmable Fluid G1/4 0 → 10 V, 4 → 20 mA M12 Connector IO-LINK <3 (Maximum Analogue Output) ms, <3 (Minimum Switching Output) ms 150 mA @ +60 °C, 200 mA @ +60 °C, 250 mA @ +40 °C - 18 → 30 V dc
RS Stock No. 125-3729
Mfr. Part No.7MF1567-3DA00-1AA1
BrandSiemens
$461.48
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 - 7 → 33 V dc
RS Stock No. 317-948
Mfr. Part No.6761-0013
BrandHerga
$23.24
Each
units
Differential - 0.9psi - - - - - Spade Terminal - - - - 250 V ac
RS Stock No. 797-5037
BrandRS PRO
$342.42
Each
units
Relative 0bar 10bar ±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. 324-0964
Mfr. Part No.XMLA160D2S11
$571.32
Each
units
Differential 10bar 160bar 2 % Relay Hydraulic Fluid G1/4 - PG13.5 Cable Gland - - 3 A ac, 100 mA dc - 120 → 240 V ac, 250 V dc
RS Stock No. 746-3499
Mfr. Part No.X5072-TB-A1-CA-H1-PA 250 bar SG
BrandDruck
$598.22
Each
units
Relative - 250bar ±0.2 % Analogue Fluid G1/4 4 → 20 mA DIN 43650 Type A - 10 ms 20 mA - 7 → 28 V
RS Stock No. 124-2134
Mfr. Part No.XMLP006GD11F
$204.85
Each
units
- 0bar 6bar ±0.1 (Repeat) %, ±0.5 (Measurement) % Analogue Air, Fresh Water, Gas, Hydraulic Oil G1/4 0.5 → 4.5 V M12 4-Pin Connector - ≤2 ms <5 mA - 5 V dc
RS Stock No. 324-0992
Mfr. Part No.XMLB002A2S11
$416.97
Each
units
Differential 0.3bar 2.5bar 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. 313-5301
Mfr. Part No.14X1SA1GV1
BrandVega
$453.32
Each
units
Relative 0bar 0.1bar 0.3 % - Fluid, Gas, Vapour G1/2 4 → 20 mA DIN 43650 Connector - - - Vegabar 14 12 → 36 V dc
RS Stock No. 374-8799
Mfr. Part No.787265
BrandBurkert
$46.54
Each
units
Differential 1bar 10bar - Relay Air, Hydraulic Fluid, Oil Emulsion, Water G1/4 - Spade Terminal - - - Type 1045 -
RS Stock No. 746-3638
Mfr. Part No.X5072-TB-A2-CA-H1-PA 10.0 bar G
BrandDruck
$638.64
Each
units
Relative - 10bar ±0.1 % Analogue Fluid G1/4 4 → 20 mA DIN 43650 Type A - 10 ms 20 mA - 7 → 28 V
RS Stock No. 374-8761
Mfr. Part No.787260
BrandBurkert
$46.66
Each
units
Differential 1bar 10bar - Relay Air, Hydraulic Fluid, Oil Emulsion, Water G1/8 - Spade Terminal - - 2 A Type 1045 42 V
RS Stock No. 518-4434
BrandRS PRO
$231.02
Each
units
Gauge 0bar 10bar ≤0.5 % Analogue Gas, Liquid G1/4 4 → 20 mA M12 Connector - ≤3 ms - - 10 → 30 V dc