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 Communication Protocol Response Time Maximum Current Supply Voltage Interface
RS Stock No. 835-3933
Mfr. Part No.PU5415
$213.79
Each
units
Relative 0bar 6bar ±0.5 % Analogue Gas, Liquid G1/4 0 → 10 V M12 Connector - 1 ms - 16 → 36 V dc -
RS Stock No. 835-3894
Mfr. Part No.PT5404
$230.23
Each
units
Relative 0bar 10bar ±0.5 % Analogue Gas, Liquid G1/4 4 → 20 mA M12 Connector - 1 ms - 8.5 → 36 V dc -
RS Stock No. 739-6724
Mfr. Part No.PK7521
$419.20
Each
units
Relative 0bar 250bar <±2.5 % 2NO Gas, Liquid G1/4 - M12 Connector - - 500 mA 9.6 → 32 V dc -
RS Stock No. 125-1268
Mfr. Part No.PN7071
$617.61
Each
units
Relative 0bar 250bar ±0.5 % 2x PNP/NPN-NO/NC Fluid G1/4 - M12 Connector IO-LINK <3 (Minimum Switching Output) ms 150 mA @ +60 °C, 200 mA @ +60 °C, 250 mA @ +40 °C 18 → 30 V dc IO-Link
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 IO-Link
RS Stock No. 739-6721
Mfr. Part No.PK7524
$334.53
Each
units
Relative 0bar 10bar <±2.5 % PNP-2NO Gas, Liquid G1/4 - M12 Connector - - 500 mA 9.6 → 32 V dc -
RS Stock No. 835-3863
Mfr. Part No.PG2454
$773.43
Each
units
Relative -1bar 10bar ±0.5 % Analogue + PNP NO/NC Programmable Gas, Liquid G1/2 4 → 20 mA M12 Connector - 9 ms, 28 ms 250 mA 18 → 32 V dc -
RS Stock No. 739-6715
Mfr. Part No.PK7520
$344.19
Each
units
Relative 0bar 400bar <±2.5 % 2NO Gas, Liquid G1/4 - M12 Connector - - 500 mA 9.6 → 32 V dc -
RS Stock No. 125-1271
Mfr. Part No.PN7094
$626.87
Each
units
Relative -1bar 10bar ±0.5 % 2x PNP/NPN-NO/NC Fluid G1/4 - M12 Connector IO-LINK <3 (Minimum Switching Output) ms 150 mA @ +60 °C, 200 mA @ +60 °C, 250 mA @ +40 °C 18 → 30 V dc IO-Link
RS Stock No. 835-3923
Mfr. Part No.PU5403
$227.50
Each
units
Relative 0bar 25bar ±0.5 % Analogue Gas, Liquid G1/4 0 → 10 V M12 Connector - 1 ms - 16 → 36 V dc -
RS Stock No. 835-3901
Mfr. Part No.PT5415
$210.63
Each
units
Relative 0bar 6bar ±0.5 % Analogue Gas, Liquid G1/4 4 → 20 mA M12 Connector - 1 ms - 8.5 → 36 V dc -
RS Stock No. 835-3891
Mfr. Part No.PT5403
$226.03
Each
units
Relative 0bar 25bar ±0.5 % Analogue Gas, Liquid G1/4 4 → 20 mA M12 Connector - 1 ms - 8.5 → 36 V dc -
RS Stock No. 835-3885
Mfr. Part No.PT5400
$216.72
Each
units
Relative 0bar 400bar ±0.5 % Analogue Gas, Liquid G1/4 4 → 20 mA M12 Connector - 1 ms - 8.5 → 36 V dc -
RS Stock No. 835-3882
Mfr. Part No.PT5402
$227.50
Each
units
Relative 0bar 100bar ±0.5 % Analogue Gas, Liquid G1/4 4 → 20 mA M12 Connector - 1 ms - 8.5 → 36 V dc -
RS Stock No. 739-6727
Mfr. Part No.PK7523
$334.53
Each
units
Relative 0bar 25bar <±2.5 % 2NO Gas, Liquid G1/4 - M12 Connector - - 500 mA 9.6 → 32 V dc -
RS Stock No. 835-3898
Mfr. Part No.PT5412
$213.79
Each
units
Relative 0bar 160bar ±0.5 % Analogue Gas, Liquid G1/4 4 → 20 mA M12 Connector - 1 ms - 8.5 → 36 V dc -
RS Stock No. 835-3920
Mfr. Part No.PU5402
$210.63
Each
units
Relative 0bar 100bar ±0.5 % Analogue Gas, Liquid G1/4 0 → 10 V M12 Connector - 1 ms - 16 → 36 V dc -
RS Stock No. 125-1300
Mfr. Part No.PN3560
$738.57
Each
units
Relative 0bar 600bar ±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 IO-Link
RS Stock No. 835-3888
Mfr. Part No.PT5401
$213.79
Each
units
Relative 0bar 250bar ±0.5 % Analogue Gas, Liquid G1/4 4 → 20 mA M12 Connector - 1 ms - 8.5 → 36 V dc -
RS Stock No. 125-1285
Mfr. Part No.PN2097
$758.31
Each
units
Relative -0.05bar 1bar <±0.4 % Analogue + PNP-NO/NC Programmable Fluid G1/4 0 → 10 V, 4 → 20 mA M12 Connector IO-LINK <1.5 (Minimum Switching Output) ms, <3 (Maximum Analogue Output) ms 250 mA 18 → 30 V dc IO-Link