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. 609-6912
Mfr. Part No.XMLA002A2S11
TWD7,150.00
Each
units
Differential 0.15bar 2.5bar 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. 324-0992
Mfr. Part No.XMLB002A2S11
TWD6,494.00
Each
units
Differential 0.3bar 2.5bar 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. 324-1002
Mfr. Part No.XMLB004A2S11
TWD8,986.00
Each
units
Differential 0.25bar 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. 361-3378
Mfr. Part No.XMLB004A2S12
TWD8,986.00
Each
units
Differential 0.25bar 4bar 2 % Relay Air, Fresh Water, Hydraulic Fluid, Sea Water G1/4 - M20 Cable Gland - - 3 A ac, 100 mA dc 120 → 240 V ac, 250 V dc -
RS Stock No. 361-3435
Mfr. Part No.XMLA004A2S12
TWD4,458.00
Each
units
Differential 0.4bar 4bar 2 % Relay Air, Fresh Water, Hydraulic Fluid, Sea Water G1/4 - M20 Cable Gland - - 3 A ac, 100 mA dc 120 → 240 V ac, 250 V dc -
RS Stock No. 399-1612
Mfr. Part No.XMAV06L2135
TWD2,614.00
Each
units
Differential 1bar 6bar 3.5 % Relay Air, Fresh Water, Sea Water G1/4 - Screw Terminals - - 3 A ac, 100 mA dc 120 → 240 V ac, 250 V dc -
RS Stock No. 324-0964
Mfr. Part No.XMLA160D2S11
TWD4,753.00
Each
units
Differential 10bar 160bar 2 % Relay Hydraulic Fluid G1/4 - PG13.5 Cable Gland - - 3 A ac, 100 mA dc 120 → 240 V ac, 250 V dc -
RS Stock No. 199-399
Mfr. Part No.XMPA12C2131
TWD1,519.00
Each
units
Differential 1.3bar 12bar 3.5 % - Air, Fresh Water, Sea Water G1/4 - PG13.5 Cable Gland - - 1.5 A - -
RS Stock No. 361-3457
Mfr. Part No.XMLA020A2S12
TWD5,233.00
Each
units
Differential 1bar 20bar 2 % Relay Air, Fresh Water, Hydraulic Fluid, Sea Water G1/4 - M20 Cable Gland - - 3 A ac, 100 mA dc 120 → 240 V ac, 250 V dc -
RS Stock No. 772-9907
Mfr. Part No.XMPA12B2131
TWD1,215.00
Each
units
- - - - - - - - - - - - - -
RS Stock No. 146-5280
Mfr. Part No.XMLP100BC71F
TWD4,227.00
Each
units
Differential - 300bar ±0.5 % Analogue Air, Fresh Water, Hydraulic Oil G1/4 0 → 10 V 3-Pin EN 175301-803-A Male Connector - <2 ms <7 mA 24 V dc -
RS Stock No. 179-9891
Mfr. Part No.XMLK016B2D21
TWD3,685.00
Each
units
Differential - - ±1 % Analogue Fluid G1/4 4 → 20 mA M12 Male Connector - 5 ms 20 mA 24 V dc -
RS Stock No. 146-5281
Mfr. Part No.XMLP100BD71F
TWD4,583.00
Each
units
Differential - 300bar ±0.5 % Analogue Air, Fresh Water, Hydraulic Oil G1/4 0 → 10 V 4-Pin M12 Male Connector - <2 ms <7 mA 24 V dc -
RS Stock No. 399-1634
Mfr. Part No.XMAV25L2135
TWD4,292.00
Each
units
Differential 3.5bar 25bar 3.5 % Relay Air, Fresh Water, Sea Water G1/4 - Screw Terminals - - 3 A ac, 100 mA dc 120 → 240 V ac, 250 V dc -
RS Stock No. 179-9892
Mfr. Part No.XMLK016B2D71
TWD3,685.00
Each
units
Differential - - ±1 % Analogue Fluid G1/4 0 → 10 V M12 Male Connector - 5 ms 6 mA 24 V dc -
RS Stock No. 146-2914
Mfr. Part No.XMEP250BV71F
TWD5,385.00
Each
units
Differential - 750bar 0.1 % Analogue Air, Fresh Water, Hydraulic Oil G1/4 0 → 10 V 3-Pin Superseal 1.5 A Male Connector - ≤2 ms <7 mA 24 V dc -
RS Stock No. 324-0958
Mfr. Part No.XMLA070D2S11
TWD5,039.00
Each
units
Differential 50bar 70bar 2 % Relay Hydraulic Fluid G1/4 - PG13.5 Cable Gland - - 3 A ac, 100 mA dc 120 → 240 V ac, 250 V dc -
RS Stock No. 609-7016
Mfr. Part No.XMLB035A2S11
TWD8,956.00
Each
units
Differential 3.5bar 35bar 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. 199-412
Mfr. Part No.XMLA010B2S11
TWD8,288.00
Each
units
Differential 0.6bar 10bar 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. 135-3777
Mfr. Part No.XMLRM01G0T75
TWD13,056.00
Each
units
- -1bar 0bar ±1 % Analogue Air, Fresh Water, Hydraulic Fluid, Refrigeration Fluid - 0 → 10 V 4 Pole M12 Connector - ≤10 ms ≤50 mA 24 V dc -