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. 455-4630
Mfr. Part No.3100B0016G01B000
HK$1,268.34
Each
units
Gauge 0bar 16bar 0.25 % Analogue Air Fluid, Hydraulic Fluid, Hydraulic Oil, Oil G1/4 4 → 20 mA DIN 43650 Type C 1 ms - 8 → 30 V dc - -
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. 302-5844
Mfr. Part No.XMLA020A2S11
HK$1,122.04
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. 797-5011
BrandRS PRO
HK$1,175.93
Each
units
Gauge 0bar 6bar ±0.25 % Current Air, Gas, Hydraulic Fluid, Liquid, Water BSP 1/4 4 → 20 mA DIN 43650 Connector - 20 mA 9 → 32 V dc - Stainless Steel
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. 828-5710
BrandRS PRO
HK$1,369.45
Each
units
Gauge 0mbar 100mbar <±0.25 % Current Oil, Water BSP 1/4 4 → 20 mA DIN 43650 Connector - 28 mA 9 → 32 V dc - Stainless Steel
RS Stock No. 797-4964
BrandRS PRO
HK$1,175.93
Each
units
Gauge 0bar 16bar ±0.25 % Voltage Air, Gas, Hydraulic Fluid, Liquid, Water BSP 1/4 0 → 100 mV DIN 43650 Connector - - 3 → 12 V dc - Stainless Steel
RS Stock No. 739-6777
Mfr. Part No.PBT-RB010SG1SSNAMA0Z
BrandSick
HK$1,206.81
Each
units
Gauge 0bar 10bar ±0.5 % Analogue Fluid, Gas G1/4 4 → 20 mA M12 Connector 4 ms 25 mA 8 → 30 V dc - Stainless Steel
RS Stock No. 463-5593
Mfr. Part No.404366/000-451-405-504-20-61/000
BrandJumo
HK$3,070.34
Each
units
Gauge 0bar 0.25bar 0.2 % Analogue Fluid, Gas G1/2 4 → 20 mA DIN 43650 Connector - - 10 → 30 V dc - Stainless Steel
RS Stock No. 828-5701
BrandRS PRO
HK$1,369.45
Each
units
Gauge 0mbar 50mbar <±0.25 % Voltage Oil, Water BSP 1/4 0.5 → 4.5 V DIN 43650 Connector - 6 mA 9 → 32 V dc - Stainless Steel
RS Stock No. 239-0771
Mfr. Part No.4246-52
BrandNorgren
HK$882.85
Each
units
- - 17bar 12 % Relay Air G1/4 - DIN Connector - 5 A 240 V ac/dc - Aluminium
RS Stock No. 828-5723
BrandRS PRO
HK$1,399.70
Each
units
Gauge 0mbar 500mbar <±0.25 % Voltage Oil, Water BSP 1/4 0.5 → 4.5 V DIN 43650 Connector - 6 mA 9 → 32 V dc - Stainless Steel
RS Stock No. 797-4983
BrandRS PRO
HK$1,175.93
Each
units
Gauge 0bar 1bar ±0.25 % Current Air, Gas, Hydraulic Fluid, Liquid, Water BSP 1/4 4 → 20 mA DIN 43650 Connector - 20 mA 9 → 32 V dc - Stainless Steel
RS Stock No. 725-5945
Mfr. Part No.12719316
BrandWIKA
HK$996.09
Each
units
Gauge 0bar 40bar 0.5 % Current Hydraulic Fluid - 4 → 20 mA - - - 8 → 30 V dc - Stainless Steel
RS Stock No. 374-8890
Mfr. Part No.787269
BrandBurkert
HK$1,115.39
Each
units
Differential 1bar 10bar - Relay Air, Hydraulic Fluid, Oil Emulsion, Water G1/4 - Spade Terminal - - - - -
RS Stock No. 667-0914
Mfr. Part No.40PC100G2A
BrandHoneywell
HK$607.23
Each
units
Gauge 0psi 100psi 0.8 % Amplified Gas - 0.5 mA PCB 1 ms - 5 V dc - -
RS Stock No. 455-4551
Mfr. Part No.22ISBGB1000ABUA001
HK$2,308.92
Each
units
Gauge 0bar 10bar 0.25 % Analogue Fluid, Gas BSP 1/4 4 → 20 mA DIN 43650 Type A - - 7 → 35 V dc - -
RS Stock No. 455-4567
Mfr. Part No.22ISBGB2500ABUA001
HK$2,543.15
Each
units
Gauge 0bar 25bar 0.25 % Analogue Fluid, Gas BSP 1/4 4 → 20 mA DIN 43650 Type A - - 7 → 35 V dc - -
RS Stock No. 317-948
Mfr. Part No.6761-0013
BrandHerga
HK$82.14
Each
units
Differential - 0.9psi - - - - - Spade Terminal - - 250 V ac - PET
RS Stock No. 374-8777
Mfr. Part No.787264
BrandBurkert
HK$356.98
Each
units
Differential 50bar 200bar - Relay Air, Hydraulic Fluid, Oil Emulsion, Water G1/4 - Spade Terminal - - - - -