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 Process Connection Analogue Output Electrical Connection Response Time Maximum Current Supply Voltage Interface Housing Material
RS Stock No. 922-7308
Mfr. Part No.MPX2010DP
BrandNXP
$14.65
Each (In a Tube of 20)
units
Differential 0kPa 10kPa ±1 % - Air - 24 → 26 mV PCB Mount 1 ms - 10 V dc - Epoxy
RS Stock No. 746-3464
Mfr. Part No.X5072-TB-A1-CA-H1-PA 4.0 bar G
BrandDruck
$459.46
Each
units
Gauge - 4bar ±0.2 % Analogue Fluid G1/4 4 → 20 mA DIN 43650 Type A 10 ms 20 mA 7 → 28 V - Stainless Steel
RS Stock No. 397-1113
Mfr. Part No.6101-0002
BrandHerga
$52.96
Each
units
Differential 62.5mbar 500mbar - Relay Fluid - - - - 20 mA 250 V ac - Fibreglass
RS Stock No. 455-4753
Mfr. Part No.3100R1000S2TB000
$300.51
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 - Stainless Steel
RS Stock No. 169-8085
Mfr. Part No.ADP42510
BrandPanasonic
$20.971
Each (In a Tube of 100)
units
Gauge - - ±0.3 % Voltage Air, Fluid - 100±40 mV PCB - 1.5 mA - - -
RS Stock No. 835-3927
Mfr. Part No.PU5404
$147.79
Each
units
Relative 0bar 10bar ±0.5 % Analogue Gas, Liquid G1/4 0 → 10 V M12 Connector 1 ms - 16 → 36 V dc - Stainless Steel
RS Stock No. 123-7143
Mfr. Part No.SDP616
BrandSensirion
$77.26
Each
units
Differential -500Pa 500Pa 3 % I2C Air, Nitrogen Gas, Oxygen Gas 5.2 mm Tube - - 90 ms <5 mA 3.3 V - PBT
RS Stock No. 455-4517
Mfr. Part No.22ISBGA1000ABUA001
$673.57
Each
units
- 0bar 1bar 0.25 % Analogue Gas, Petrochemical, Sewage BSP 1/4 4 → 20 mA DIN 43650 Type A - - 7 → 35 V dc - -
RS Stock No. 424-5730
Mfr. Part No.404366/000-456-405-504-20-61/000
BrandJumo
$584.23
Each
units
Gauge 0bar 2.5bar 0.2 % Analogue Fluid, Gas G1/2 4 → 20 mA DIN 43650 Connector - - 10 → 30 V dc - Stainless Steel
RS Stock No. 797-5009
BrandRS PRO
$245.63
Each
units
Gauge 0bar 6bar ±0.25 % Voltage Air, Gas, Hydraulic Fluid, Liquid, Water BSP 1/4 0 → 100 mV DIN 43650 Connector - - 3 → 12 V dc - Stainless Steel
RS Stock No. 719-1080
Mfr. Part No.MPX5010DP
BrandNXP
$23.89
Each
units
- - - - - - - - - - - - - -
RS Stock No. 455-4545
Mfr. Part No.22ISBGA6000ABUA002
$385.34
Each
units
Gauge 0bar 6bar 0.25 % Analogue Fluid, Gas BSP 1/4 4 → 20 mA DIN 43650 Type A - - 7 → 35 V dc - -
RS Stock No. 463-5717
Mfr. Part No.401001/000-459-405-523-20-601-61/000
BrandJumo
$298.38
Each
units
- 0bar 10bar 0.5 % - Hydraulic Fluid, Pneumatic Fluid G1/2 4 → 20 mA DIN 43650 Connector - - 10 → 30 V dc - Stainless Steel
RS Stock No. 609-7094
Mfr. Part No.XMPE12C2242
$131.64
Each
units
Differential 1.3bar 12bar 3.5 % - Air, Fresh Water, Sea Water G3/8 - PG13.5 Cable Gland - 1.5 A - - Fibreglass
RS Stock No. 896-8471
Mfr. Part No.3500B02B5A01B000
$202.45
Each
units
Absolute - 2.5bar 0.25 % Current Air, Gas, Water G1/4 4 → 20 mA DIN 43650 Type C - - 10 → 30 V dc - Stainless Steel
RS Stock No. 896-8478
Mfr. Part No.3500B0006A01B000
$203.91
Each
units
Absolute - 6bar 0.25 % Current Air, Gas, Water G1/4 4 → 20 mA DIN 43650 Type C - - 10 → 30 V dc - Stainless Steel
RS Stock No. 613-7732
Mfr. Part No.404366/000-451-405-504-20-61/000
BrandJumo
$493.69
Each
units
Relative 0bar 0.25bar - - Fluid, Gas G1/2 4 → 20 mA DIN 43650 Connector - - 10 → 30 V dc - Stainless Steel
RS Stock No. 455-4781
Mfr. Part No.3100B0250S01E000
$288.37
Each
units
Gauge 0bar 250bar 0.25 % Analogue Air Fluid, Hydraulic Fluid, Hydraulic Oil, Oil G1/4 4 → 20 mA M12 Connector 1 ms - 8 → 30 V dc - -
RS Stock No. 448-8094
Mfr. Part No.0184457031-SS
BrandSuco
$225.18
Each
units
- 0.5bar 5bar - Relay Air, Heating Oil, Hydraulic Fluid, Turpentine G1/4 - DIN 46350 Connector - 4 A 250 V - Stainless Steel
RS Stock No. 746-3638
Mfr. Part No.X5072-TB-A2-CA-H1-PA 10.0 bar G
BrandDruck
$591.41
Each
units
Gauge - 10bar ±0.1 % Analogue Fluid G1/4 4 → 20 mA DIN 43650 Type A 10 ms 20 mA 7 → 28 V - Stainless Steel
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