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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Omschrijving Prijs 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-stocknr. 797-4995
FabrikantRS PRO
166,48 €
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Aantal stuks
Relative 0bar 100bar ±0.25 % Voltage Air, Gas, Hydraulic Fluid, Liquid, Water - G1/4 0 → 100 mV DIN 43650 Type C - - - 3 → 12 V dc
RS-stocknr. 175-5028
FabrikantRS PRO
215,15 €
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Aantal stuks
Relative 0psi 15psi ±0.25 % Analogue - - NPT 1/4 4 → 20 mA M12 Connector - - 20 mA 9 → 32 V dc
RS-stocknr. 175-5009
FabrikantRS PRO
215,15 €
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Aantal stuks
Relative 0bar 0.1bar ±0.25 % Analogue - - G1/4 0 → 5 V M12 Connector - - - 9 → 32 V dc
RS-stocknr. 175-5006
FabrikantRS PRO
266,61 €
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Relative 0bar 50mbar ±0.25 % Analogue - - G1/4 4 → 20 mA M12 Connector - - 20 mA 9 → 32 V dc
RS-stocknr. 102-4155
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357,10 €
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Relative 0bar 0.25bar ±0.25 % Analogue Oil - G1/4 4 → 20 mA DIN 43650 Type A - - 28 mA 9 → 32 V dc
RS-stocknr. 175-4987
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148,42 €
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Relative 0bar 100bar ±0.25 % Analogue - - G1/4 4 → 20 mA M12 4-pin - - 20 mA 9 → 32 V dc
RS-stocknr. 797-4970
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166,48 €
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Relative -1bar 9bar ±0.25 % Voltage Air, Gas, Hydraulic Fluid, Liquid, Water - G1/4 0 → 5 V DIN 43650 Type C - - - 9 → 32 V dc
RS-stocknr. 175-4992
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148,42 €
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Relative 0bar 25bar ±0.25 % Analogue - - G1/4 4 → 20 mA M12 4-pin - - 20 mA 9 → 32 V dc
RS-stocknr. 175-5049
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148,42 €
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Relative 0psi 3600psi ±0.25 % Analogue - - NPT 1/4 0 → 5 V M12 Connector - - - 9 → 32 V dc
RS-stocknr. 102-4124
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258,19 €
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Relative 0bar 6bar ±0.25 % Analogue Gas, Liquid - G1/4 4 → 20 mA DIN 43650 Type A - - - 9 → 32 V dc
RS-stocknr. 123-5248
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539,53 €
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Relative 0bar 1bar ±0.25 % Analogue Air, Hydraulic Fluid, Liquid, Non-Aggressive Gas, Oil, Water - G1/4 0 → 5 V, 4 → 20 mA Wireless - - - -
RS-stocknr. 123-5252
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247,65 €
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- - - ±0.25 % Analogue - - - 0 → 5 V, 4 → 20 mA Screw Terminals - - 5 A 12 → 32 V dc
RS-stocknr. 518-4434
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120,54 €
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Gauge 0bar 10bar ≤0.5 % Analogue Gas, Liquid - G1/4 4 → 20 mA M12 Connector - ≤3 ms - 10 → 30 V dc
RS-stocknr. 797-4967
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166,48 €
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Relative 0bar 250bar ±0.25 % Current Air, Gas, Hydraulic Fluid, Liquid, Water - G1/4 4 → 20 mA DIN 43650 Type A - - 20 mA 9 → 32 V dc
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Absolute 0bar 500mbar ±0.25 % Analogue Air, Hydraulic Fluid, Liquid, Non-Aggressive Gas, Oil, Water - G1/4 0 → 5 V, 4 → 20 mA Wireless - - - -
RS-stocknr. 102-4159
FabrikantRS PRO
520,28 €
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Absolute 0bar 500mbar ±0.25 % Analogue Oil - G1/4 4 → 20 mA DIN 43650 Type A - - 28 mA 9 → 32 V dc
RS-stocknr. 175-5001
FabrikantRS PRO
148,42 €
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Aantal stuks
Relative 0bar 6bar ±0.25 % Analogue - - G1/4 4 → 20 mA M12 4-pin - - 20 mA 9 → 32 V dc
RS-stocknr. 175-5052
FabrikantRS PRO
148,42 €
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Aantal stuks
Relative 0psi 750psi ±0.25 % Analogue - - NPT 1/4 4 → 20 mA M12 Connector - - 20 mA 9 → 32 V dc
RS-stocknr. 175-4998
FabrikantRS PRO
148,42 €
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Relative 0bar 40bar ±0.25 % Analogue - - G1/4 0 → 5 V M12 4-pin - - - 9 → 32 V dc
RS-stocknr. 828-5735
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183,18 €
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Relative 0bar 0.75bar <±0.25 % Voltage Oil, Water - G1/4 0.5 → 4.5 V DIN 43650 Type A - - 6 mA 9 → 32 V dc