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. 111-5924
Mfr. Part No.PX3AG1BH046BSAAX
BrandHoneywell
$102.22
Each
units
Relative 0bar 46bar ±0.25 % Analogue Air, Brake Fluid, Hydraulic Fluid, Oil, Refrigeration Fluid G1/4 0.5 → 4.5 V Metri-Pack 150 - <2 ms 3 mA - 4.75 → 5.25 V dc
RS Stock No. 124-2174
Mfr. Part No.XMPA12C2142
$219.65
Each
units
Differential 1.3bar 12bar ±0.5 % 3NC - G1/4 - Screw Terminals - - - - -
RS Stock No. 719-1030
Mfr. Part No.MPX2010GP
BrandNXP
$29.93
Each
units
Relative 0bar 10kPa ±1 % - Air - 24 → 26 mV PCB Mount - 1 ms - - 10 V dc
RS Stock No. 455-4753
Mfr. Part No.3100R1000S2TB000
$223.63
Each
units
- 0bar 1000bar 0.25 % - Air Fluid, Hydraulic Fluid, Hydraulic Oil, Oil M12 0 → 5 V DIN 43650 Type C - - - - 10 → 36 V dc
RS Stock No. 124-2133
Mfr. Part No.XMLP001GL71F
$247.03
Each
units
- 0bar 1bar ±0.1 (Repeat) %, ±0.5 (Measurement) % Analogue Air, Fresh Water, Gas, Hydraulic Oil G1/4 0 → 10 V Cable - ≤2 ms <7 mA - 24 V dc
RS Stock No. 424-5730
Mfr. Part No.404366/000-456-405-504-20-61/000
BrandJumo
$664.29
Each
units
Relative 0bar 2.5bar 0.2 % Analogue Fluid, Gas G1/2 4 → 20 mA DIN 43650 Connector - - - - 10 → 30 V dc
RS Stock No. 827-6668
Mfr. Part No.PSE531-M5-L
BrandSMC
$127.97
Each
units
Relative 0bar -101kPa ±5 % Analogue Air, Gas - 0.6 → 1 V, 1 → 5 V Wire Lead - - 15 mA - 12 → 24 V dc
RS Stock No. 922-7302
Mfr. Part No.MPX2010GP
BrandNXP
$22.137
Each (In a Tray of 20)
units
Relative 0bar 10kPa ±1 % - Air - 24 → 26 mV PCB Mount - 1 ms - - 10 V dc
RS Stock No. 922-7308
Mfr. Part No.MPX2010DP
BrandNXP
$21.021
Each (In a Tube of 20)
units
Differential 0bar 10kPa ±1 % - Air - 24 → 26 mV PCB Mount - 1 ms - - 10 V dc
RS Stock No. 302-5822
Mfr. Part No.XMLA004A2S11
$485.52
Each
units
Differential 0.4bar 4bar 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. 124-2168
Mfr. Part No.XMPA06C2242
$180.10
Each
units
Differential 0.2 (Falling) bar, 1 (Rising) bar 4.8 (Falling) bar, 6 (Rising) bar <3.5 (Repeat) % 3NC Air, Fresh Water, Sea Water G3/8 - Screw Clamp - - - - -
RS Stock No. 374-8755
Mfr. Part No.787261
BrandBurkert
$70.11
Each
units
Differential 1bar 10bar - Relay Air, Hydraulic Fluid, Oil Emulsion, Water G1/4 - Spade Terminal - - - Type 1045 -
RS Stock No. 455-4545
Mfr. Part No.22ISBGA6000ABUA002
$516.76
Each
units
Relative 0bar 6bar 0.25 % Analogue Fluid, Gas G1/4 4 → 20 mA DIN 43650 Type A - - - - 7 → 35 V dc
RS Stock No. 169-8085
Mfr. Part No.ADP42510
BrandPanasonic
$28.443
Each (In a Tube of 100)
units
Relative - - ±0.3 % Voltage Air, Fluid - 100±40 mV PCB - - 1.5 mA - -
RS Stock No. 463-5565
Mfr. Part No.401001/000-457-405-523-20-601-61/000
BrandJumo
$333.42
Each
units
- 0bar 4bar 0.5 % - Hydraulic Fluid, Pneumatic Fluid G1/2 4 → 20 mA DIN 43650 Connector - - - - 15 → 30 V dc
RS Stock No. 535-1230
Mfr. Part No.5266500LBACTI
$319.76
Each
units
Differential -500Pa 500Pa ±1 % Analogue Air, Non-Conductive Gas - 0 → 10 V Terminal Strip - 1 s - - 24 V ac/dc
RS Stock No. 398-6985
Mfr. Part No.0184457031003
BrandSuco
$163.83
Each
units
- 0.3bar 1.5bar - Relay Air, Heating Oil, Hydraulic Fluid, Turpentine G1/4 - DIN 46350 Connector - - 4 A 0184 250 V
RS Stock No. 124-2134
Mfr. Part No.XMLP006GD11F
$220.01
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. 774-4097
Mfr. Part No.SDP1000-L05
BrandSensirion
$183.69
Each
units
Differential -5Pa 125Pa 0.3 %, 2 % Analogue Air, Non-Aggressive Gas - 0.25 → 4 V 3 Pin SMD Connector - 40 ms 5.2 mA SDP1000 4.75 → 5.25 V
RS Stock No. 797-5009
BrandRS PRO
$323.78
Each
units
Relative 0bar 6bar ±0.25 % Voltage Air, Gas, Hydraulic Fluid, Liquid, Water G1/4 0 → 100 mV DIN 43650 Type C - - - - 3 → 12 V dc