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. 774-4104
Mfr. Part No.SDP610-500Pa
BrandSensirion
HK$277.87
Each
units
Differential -500Pa 500Pa 3 % I2C Air, Non-Aggressive Gas - - 4 Pin SMD Connector 4.6 ms 6 mA 2.7 → 3.3 V dc - PBT
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. 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. 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. 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. 455-4551
Mfr. Part No.22ISBGB1000ABUA001
HK$2,165.54
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. 463-5622
Mfr. Part No.401001/000-455-405-523-20-601-61/000
BrandJumo
HK$1,528.19
Each
units
- 0bar 1.6bar - - - G1/2 4 → 20 mA DIN 43650 Connector - - 10 → 30 V dc - Stainless Steel
RS Stock No. 124-1472
Mfr. Part No.46879359
BrandWIKA
HK$2,243.21
Each
units
- 0bar 6bar 0.5 % Analogue Gas, Liquid G1/4 4 → 20 mA DIN 175301-803 A < 2 ms - 10 → 30 V dc - Stainless Steel
RS Stock No. 463-5638
Mfr. Part No.404366/000-489-405-504-20-61/000
BrandJumo
HK$2,786.24
Each
units
Absolute 0bar 1.6bar 2 % Analogue Fluid, Gas G1/2 4 → 20 mA DIN 43650 Connector - - 10 → 30 V dc - Stainless Steel
RS Stock No. 397-1179
Mfr. Part No.6101-0012
BrandHerga
HK$337.61
Each
units
Differential 0.07bar 2.75bar - Relay Fluid - - - - 5 A 250 V ac - Fibreglass
RS Stock No. 135-0297
Mfr. Part No.BSP B050-EV002-A02S1B-S4
BrandBALLUFF
HK$2,582.98
Each
units
- 0bar 50bar ±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. 124-1473
Mfr. Part No.46879278
BrandWIKA
HK$1,134.58
Each
units
- 0bar 160bar 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. 146-5278
Mfr. Part No.XMLP060BC71F
HK$984.19
Each
units
Differential - 120bar ±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. 135-3777
Mfr. Part No.XMLRM01G0T75
HK$3,247.80
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 - Polyacrylamide, Stainless Steel
RS Stock No. 177-8853
Mfr. Part No.XMEP060BT11F
HK$1,326.49
Each
units
- 0bar 60bar ±0.5 % Analogue Air, Fresh Water, Hydraulic Oil - 0.5 → 4.5 V 3 Pin DEUTSCH Connector DT04-3P <=2 ms 7 mA 5 V dc - Fluorocarbon FPM, Stainless Steel AISI 316L
RS Stock No. 146-5274
Mfr. Part No.XMLP016BD71F
HK$1,013.76
Each
units
Differential - 48bar ±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. 136-5056
Mfr. Part No.3100S0040G01E000
HK$1,088.71
Each
units
Gauge 0bar 40bar 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. 146-5279
Mfr. Part No.XMLP060BD71F
HK$984.19
Each
units
Differential - 180bar ±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 - FPM, Stainless Steel
RS Stock No. 111-5920
Mfr. Part No.PX3AN2BS100PAAAX
BrandHoneywell
HK$639.05
Each
units
Absolute 0psi 100psi ±0.25 % Analogue Air, Brake Fluid, Hydraulic Fluid, Oil, Refrigeration Fluid NPT 1/8 0.5 → 4.5 V Metri-Pack 150 <2 ms 3 mA 4.75 → 5.25 V dc - Brass
RS Stock No. 822-8183
Mfr. Part No.9222502
BrandHoneywell
HK$7,768.63
Each
units
Sealed Gauge 0psi 200psi ±0.25 % Unamplified - - 0 → 100 mV Wire Lead - - 5 → 6 V dc - Stainless Steel
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