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. 430-9812
Mfr. Part No.401001/000-463-405-502-20-601-61/000
BrandJumo
HK$1,524.60
Each
units
- 0bar 60bar - - - G1/4 4 → 20 mA DIN 43650 Connector - - 10 → 30 V dc - Stainless Steel
RS Stock No. 397-1191
Mfr. Part No.6101-0013
BrandHerga
HK$327.05
Each
units
Differential 0.7bar 16bar - Relay Fluid - - - - 5 A 250 V ac - Metal
RS Stock No. 324-1030
Mfr. Part No.XMLBM02V2S11
HK$1,721.30
Each
units
Differential -0.87bar -0.01bar 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. 136-5057
Mfr. Part No.3100S0060G01E000
HK$1,088.71
Each
units
Gauge 0bar 60bar 0.25 % Analogue Air Fluid, Hydraulic Fluid, Hydraulic Oil, Oil G1/4 0 → 10 V 4-Pin M12 x 1 Connector 1 ms 2 (Sink & Source) mA 8 → 30 V dc - 17-4 PH Stainless Steel (Wetted Part)
RS Stock No. 175-4999
BrandRS PRO
HK$1,299.21
Each
units
Gauge 0bar 400bar ±0.25 % Analogue - BSP 1/4 4 → 20 mA DIN 43650 - 20 mA 9 → 32 V dc - Stainless Steel
RS Stock No. 179-9889
Mfr. Part No.XMLK010B2D71
HK$1,392.69
Each
units
Differential - - ±1 % Analogue Fluid G1/4 0 → 10 V M12 Male Connector 5 ms 6 mA 24 V dc - Ceramic, Nitrile (NBR), Stainless Steel
RS Stock No. 124-1482
Mfr. Part No.46879286
BrandWIKA
HK$1,033.76
Each
units
- 0bar 6bar 0.5 % Analogue Gas, Liquid G1/4 4 → 20 mA DIN 175301-803 C < 4 ms - 8 → 30 V dc - Stainless Steel
RS Stock No. 135-0298
Mfr. Part No.BSP B100-EV002-A02S1B-S4
BrandBALLUFF
HK$2,582.98
Each
units
- 0bar 100bar ±0.2 (Repeat) % PNP - G1/4 4 → 20 mA 4-Pin M12 Connector - 250 mA 18 → 36 V dc IO-Link Nylon 66
RS Stock No. 124-1474
Mfr. Part No.46879245
BrandWIKA
HK$1,088.71
Each
units
- 0bar 400bar 0.5 % Analogue Gas, Liquid G1/4 4 → 20 mA M12 x 1 < 4 ms - 8 → 30 V dc - Stainless Steel
RS Stock No. 914-8353
Mfr. Part No.DP101AM
BrandPanasonic
HK$1,007.28
Each
units
Gauge -0.1MPa 0.1MPa - Analogue + NPN-NO/NC Programmable Non-Corrosive Gas G1/8 1 → 5 V dc, 4 → 20 mA Wire Lead 5000 ms 100 mA 12 → 24 V dc - PBT
RS Stock No. 613-7681
Mfr. Part No.404366/000-455-405-504-20-61/000
BrandJumo
HK$1,960.00
Each
units
Relative 0bar 1.6bar - - Fluid, Gas G1/2 4 → 20 mA DIN 43650 Connector - - 10 → 30 V dc - Stainless Steel
RS Stock No. 463-5767
Mfr. Part No.404366/000-488-405-504-20-61/000
BrandJumo
HK$2,786.24
Each
units
Absolute 0bar 1bar 2 % Analogue Fluid, Gas G1/2 4 → 20 mA DIN 43650 Connector - - 10 → 30 V dc - Stainless Steel
RS Stock No. 463-5644
Mfr. Part No.404366/000-492-405-504-20-61/000
BrandJumo
HK$2,786.24
Each
units
Absolute 0bar 0 → 6bar 0.5 % Analogue Fluid, Gas G1/2 4 → 20 mA DIN 43650 Connector - - 10 → 30 V dc - Stainless Steel
RS Stock No. 448-8016
Mfr. Part No.5000BGN2000M3004A001
HK$5,048.91
Each
units
Gauge 71mbar 200mbar 0.2 % Analogue Water/Diesel/Fuel Oil G1/4 4 → 20 mA Wire Lead 5 ms 20 mA 9 → 35 V dc - Stainless Steel
RS Stock No. 146-5288
Mfr. Part No.XMLPM09BC71F
HK$1,468.56
Each
units
Differential - 30bar ±0.5 % Analogue Air, Fresh Water, Gas, Hydraulic Oil, Refrigeration Fluid G1/4 0 → 10 V 3-Pin EN 175301-803-A Male Connector ≤2 ms <7 mA 24 V dc - FPM, Stainless Steel
RS Stock No. 136-5031
Mfr. Part No.3100B0160S05G000
HK$1,165.96
Each
units
Gauge 0bar 160bar 0.25 % Analogue Air Fluid, Hydraulic Fluid, Hydraulic Oil, Oil G1/4 4 → 20 mA Large DIN Connector 1 ms 2 (Sink & Source) mA 8 → 30 V dc - 17-4 PH Stainless Steel (Wetted Part)
RS Stock No. 111-5921
Mfr. Part No.PX3AG1BH010BSAAX
BrandHoneywell
HK$550.09
Each
units
Sealed Gauge 0bar 10bar ±0.25 % Analogue Air, Brake Fluid, Hydraulic Fluid, Oil, Refrigeration Fluid G1/4 0.5 → 4.5 V Metri-Pack 150 <2 ms 3 mA 4.75 → 5.25 V dc - Brass
RS Stock No. 125-3726
Mfr. Part No.7MF1565-3BG00-1AA1
BrandSiemens
HK$1,382.13
Each
units
Gauge 0bar 6bar 0.25 % Analogue Aggressive Media, Gas, Liquid, Non-Aggressive Media, Vapour - 4 → 20 mA DIN EN 175301 Connector, M16 <5 ms 20 mA 7 → 33 V dc - Stainless Steel
RS Stock No. 173-2213
Mfr. Part No.SDP600-500PA
BrandSensirion
HK$218.553
Each (In a Tray of 80)
units
Differential -500Pa 500Pa 3 % I2C Air, Nitrogen Gas, Oxygen Gas 5.2 mm Tube - - 4.6 ms <6 mA 3.6 V - PBT
RS Stock No. 423-3670
Mfr. Part No.404366/000-454-405-504-20-61/000
BrandJumo
HK$2,782.41
Each
units
Gauge 0bar 1bar 0.2 % - Fluid, Gas G1/2 4 → 20 mA DIN 43650 Connector - - 10 → 30 V dc - Stainless Steel