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. 125-1321
Mfr. Part No.PN2597
HK$4,773.16
Each
units
Relative -50mbar 1000mbar <±0.4 % Analogue + PNP-NO/NC Programmable Fluid G1/4 0 10 V, 4 20 mA M12 Connector <1.5 (Minimum Switching Output) ms, <3 (Maximum Analogue Output) ms 250 mA 18 30 V dc IO-Link PBT GF20, PBT+PC GF30, PC, Stainless Steel
RS Stock No. 125-1322
Mfr. Part No.PN2598
HK$4,244.80
Each
units
Relative -12.5mbar 250mbar <±0.4 % Analogue + PNP-NO/NC Programmable Fluid G1/4 0 10 V, 4 20 mA M12 Connector <1.5 (Minimum Switching Output) ms, <3 (Maximum Analogue Output) ms 250 mA 18 30 V dc IO-Link PBT GF20, PBT+PC GF30, PC, Stainless Steel
RS Stock No. 125-1323
Mfr. Part No.PN2599
HK$4,244.80
Each
units
Relative -1000mbar 1000mbar <±0.4 % Analogue + PNP-NO/NC Programmable Fluid G1/4 0 10 V, 4 20 mA M12 Connector <1.5 (Minimum Switching Output) ms, <3 (Maximum Analogue Output) ms 250 mA 18 30 V dc IO-Link PBT GF20, PBT+PC GF30, PC, Stainless Steel
RS Stock No. 125-1324
Mfr. Part No.PN2569
HK$4,244.80
Each
units
Relative -500mbar 500mbar <±0.4 % Analogue + PNP-NO/NC Programmable Fluid G1/4 0 10 V, 4 20 mA M12 Connector <1.5 (Minimum Switching Output) ms, <3 (Maximum Analogue Output) ms 250 mA 18 30 V dc IO-Link PBT GF20, PBT+PC GF30, PC, Stainless Steel
RS Stock No. 125-1290
Mfr. Part No.PN7571
HK$3,525.55
Each
units
Relative 0bar 250bar <±0.5 % 2x PNP/NPN-NO/NC Fluid G1/4 - M12 Connector <3 (Minimum Switching Output) ms 150 mA @ +60 °C, 200 mA @ +60 °C, 250 mA @ +40 °C 18 30 V dc IO-Link PBT GF20, PBT+PC GF30, PC, Stainless Steel
RS Stock No. 125-1284
Mfr. Part No.PN2096
HK$4,244.80
Each
units
Relative -0.125bar 2.5bar <±0.4 % Analogue + PNP-NO/NC Programmable Fluid G1/4 0 10 V, 4 20 mA M12 Connector <1.5 (Minimum Switching Output) ms, <3 (Maximum Analogue Output) ms 250 mA 18 30 V dc IO-Link PBT GF20, PBT+PC GF30, PC, Stainless Steel
RS Stock No. 125-1291
Mfr. Part No.PN7592
HK$3,525.55
Each
units
Relative 0bar 100bar <±0.5 % 2x PNP/NPN-NO/NC Fluid, Gas G1/4 - M12 Connector <3 (Minimum Switching Output) ms 150 mA @ +60 °C, 200 mA @ +60 °C, 250 mA @ +40 °C 18 30 V dc IO-Link PBT GF20, PBT+PC GF30, PC, Stainless Steel
RS Stock No. 125-1297
Mfr. Part No.PN3160
HK$4,094.85
Each
units
Relative 0bar 600bar <±0.5 % Analogue + PNP-NO/NC Programmable Fluid G1/4 0 10 V, 4 20 mA M12 Connector <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 PBT GF20, PBT+PC GF30, PC, Stainless Steel
RS Stock No. 125-1285
Mfr. Part No.PN2097
HK$4,244.80
Each
units
Relative -50mbar 1000mbar <±0.4 % Analogue + PNP-NO/NC Programmable Fluid G1/4 0 10 V, 4 20 mA M12 Connector <1.5 (Minimum Switching Output) ms, <3 (Maximum Analogue Output) ms 250 mA 18 30 V dc IO-Link PBT GF20, PBT+PC GF30, PC, Stainless Steel
RS Stock No. 125-1319
Mfr. Part No.PN2594
HK$4,244.80
Each
units
Relative -1bar 10bar <±0.4 % Analogue + PNP-NO/NC Programmable Fluid G1/4 0 10 V, 4 20 mA M12 Connector <1.5 (Minimum Switching Output) ms, <3 (Maximum Analogue Output) ms 250 mA 18 30 V dc IO-Link PBT GF20, PBT+PC GF30, PC, Stainless Steel
RS Stock No. 487-955
Mfr. Part No.PK7522
HK$1,429.92
Each
units
Relative 0bar 100bar ±2.5 % Relay Fluid, Gas G1/4 - M12 Connector - 500 mA 9.6 32 V dc - FPM, PBT, PC, Stainless Steel
RS Stock No. 835-3872
Mfr. Part No.PG2458
HK$3,268.98
Each
units
Relative -12.5mbar 250mbar ±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 - Stainless Steel
RS Stock No. 125-1268
Mfr. Part No.PN7071
HK$3,548.76
Each
units
Relative 0bar 250bar <±0.5 % 2x PNP/NPN-NO/NC Fluid G1/4 - M12 Connector <3 (Minimum Switching Output) ms 150 mA @ +60 °C, 200 mA @ +60 °C, 250 mA @ +40 °C 18 30 V dc IO-Link PBT GF20, PBT+PC GF30, PC, Stainless Steel
RS Stock No. 125-1279
Mfr. Part No.PN3129
HK$4,094.85
Each
units
Relative -1000mbar 0mbar <±0.5 % Analogue + PNP-NO/NC Programmable Fluid G1/4 0 10 V, 4 20 mA M12 Connector <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 PBT GF20, PBT+PC GF30, PC, Stainless Steel
RS Stock No. 125-1317
Mfr. Part No.PN2592
HK$4,244.80
Each
units
Relative 0bar 100bar <±0.4 % Analogue + PNP-NO/NC Programmable Fluid G1/4 0 10 V, 4 20 mA M12 Connector <1.5 (Minimum Switching Output) ms, <3 (Maximum Analogue Output) ms 250 mA 18 30 V dc IO-Link PBT GF20, PBT+PC GF30, PC, Stainless Steel
RS Stock No. 125-1314
Mfr. Part No.PN2560
HK$4,244.80
Each
units
Relative 0bar 600bar <±0.4 % Analogue + PNP-NO/NC Programmable Fluid G1/4 0 10 V, 4 20 mA M12 Connector <1.5 (Minimum Switching Output) ms, <3 (Maximum Analogue Output) ms 250 mA 18 30 V dc IO-Link PBT GF20, PBT+PC GF30, PC, Stainless Steel
RS Stock No. 835-3857
Mfr. Part No.PG2451
HK$3,268.98
Each
units
Relative 0bar 250bar ±0.6 % Analogue + PNP-NO/NC Programmable Gas, Liquid G1/2 4 20 mA M12 Connector 9 ms, 28 ms 250 mA 18 32 V dc - Stainless Steel
RS Stock No. 835-3876
Mfr. Part No.PG2489
HK$3,268.98
Each
units
Relative -5mbar 100mbar ±0.6 % Analogue + PNP-NO/NC Programmable Gas, Liquid G1/2 4 20 mA M12 Connector 9 ms, 28 ms 250 mA 18 32 V dc - Stainless Steel
RS Stock No. 125-1292
Mfr. Part No.PN7593
HK$3,525.55
Each
units
Relative 0bar 25bar <±0.5 % 2x PNP/NPN-NO/NC Fluid, Gas G1/4 - M12 Connector <3 (Minimum Switching Output) ms 150 mA @ +60 °C, 200 mA @ +60 °C, 250 mA @ +40 °C 18 30 V dc IO-Link PBT GF20, PBT+PC GF30, PC, Stainless Steel
RS Stock No. 125-1298
Mfr. Part No.PN3070
HK$4,094.85
Each
units
Relative 0bar 400bar <±0.5 % Analogue + PNP-NO/NC Programmable Fluid G1/4 0 10 V, 4 20 mA M12 Connector <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 PBT GF20, PBT+PC GF30, PC, Stainless Steel