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. 399-1612
Mfr. Part No.XMAV06L2135
HK$694.54
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 - PC
RS Stock No. 302-5838
Mfr. Part No.XMLA010A2S11
HK$1,253.24
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 - Zinc Alloy
RS Stock No. 324-1018
Mfr. Part No.XMLB010A2S11
HK$1,776.81
Each
units
Differential 0.7bar 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 - Zinc Alloy
RS Stock No. 609-6912
Mfr. Part No.XMLA002A2S11
HK$1,122.04
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 - Zinc Alloy
RS Stock No. 361-3384
Mfr. Part No.XMLB010A2S12
HK$1,308.55
Each
units
Differential 0.7bar 10bar 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 - Zinc Alloy
RS Stock No. 199-399
Mfr. Part No.XMPA12C2131
HK$363.30
Each
units
Differential 1.3bar 12bar 3.5 % - Air, Fresh Water, Sea Water G1/4 - PG13.5 Cable Gland - 1.5 A - - Fibreglass
RS Stock No. 399-1628
Mfr. Part No.XMAV12L2135
HK$630.92
Each
units
Differential 1.3bar 12bar 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 - PC
RS Stock No. 609-6928
Mfr. Part No.XMLA010A2C11
HK$1,226.48
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 - Zinc Alloy
RS Stock No. 302-5822
Mfr. Part No.XMLA004A2S11
HK$1,394.00
Each
units
Differential 0.4bar 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 - Zinc Alloy
RS Stock No. 324-0958
Mfr. Part No.XMLA070D2S11
HK$1,248.90
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 - Zinc Alloy
RS Stock No. 361-3435
Mfr. Part No.XMLA004A2S12
HK$1,122.04
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 - Zinc Alloy
RS Stock No. 361-3441
Mfr. Part No.XMLA010A2S12
HK$1,270.00
Each
units
Differential 0.6bar 10bar 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 - Zinc Alloy
RS Stock No. 302-5844
Mfr. Part No.XMLA020A2S11
HK$1,239.62
Each
units
Differential 1bar 20bar 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 - Zinc Alloy
RS Stock No. 399-1634
Mfr. Part No.XMAV25L2135
HK$891.12
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 - PC
RS Stock No. 199-412
Mfr. Part No.XMLA010B2S11
HK$1,930.36
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 - Zinc Alloy
RS Stock No. 361-3570
Mfr. Part No.9012ADW7M11
HK$3,147.92
Each
units
Differential 37.9bar 344.5bar - Relay Diesel Oil, Hydraulic Fluid, Oil BSP 3/8 - PG13.5 Cable Gland - 3 A dc, 5 A ac 120 → 240 V dc, 120 → 600 V ac - -
RS Stock No. 177-8849
Mfr. Part No.XMEP250BD11F
HK$1,326.49
Each
units
- 0bar 250bar ±0.5 % Analogue Air, Fresh Water, Hydraulic Oil - 0.5 → 4.5 V 4 Pin M12 Male Connector <=2 ms 7 mA 5 V dc - Fluorocarbon FPM, Stainless Steel AISI 316L
RS Stock No. 146-5286
Mfr. Part No.XMLP400BD71F
HK$1,013.76
Each
units
Differential - 1200bar ±0.5 % Analogue Air, Fresh Water, Gas, Hydraulic Oil, Refrigeration Fluid G1/4 0 → 10 V 4-Pin M12 Male Connector ≤2 ms <7 mA 24 V dc - FPM, Stainless Steel
RS Stock No. 179-9890
Mfr. Part No.XMLK016B2C21
HK$1,392.69
Each
units
Differential - - ±1 % Analogue Fluid G1/4 4 → 20 mA EN 175301-803-A Male Connector 5 ms 20 mA 24 V dc - Ceramic, Nitrile (NBR), Stainless Steel
RS Stock No. 146-2916
Mfr. Part No.XMEP400BT71F
HK$1,275.44
Each
units
Differential - 1200bar 0.1 % Analogue Air, Fresh Water, Hydraulic Oil G1/4 0 → 10 V 3-Pin DT04-3P Deutsch Connector ≤2 ms <7 mA 24 V dc - FPM, Stainless Steel