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 Calibrated Process Connection Analogue Output Electrical Connection Communication Protocol Response Time Maximum Current Supply Voltage
RS Stock No. 136-5974
Mfr. Part No.836P-D2NFGA14PA-D4
£293.00
Each
Units
Relative 0bar 1bar ±1 % Analogue, PNP Gas, Liquid, Steam - NPT 1/4 4 → 20 mA 4-Pin M12 DC Micro Connector IO-LINK - 450 mA 15 → 35 V dc
RS Stock No. 125-8439
Mfr. Part No.FMUT1MVMS08
BrandParker
£163.69
Each
Units
Differential - 420bar - - Hydraulic - SAE 8 - DIN 43650 - - 20 A 250 V ac/dc
RS Stock No. 146-2944
Mfr. Part No.XMLPM05GC71F
£98.80
Each
Units
Differential -1bar 5bar 0.1 % Analogue Air, Fresh Water, Gas, Hydraulic Oil - - 0 → 10 V 3-Pin DIN 43650 Male Connector - ≤2 ms <7 mA 24 V dc
RS Stock No. 200-6124
Mfr. Part No.MS580301BA01-00
£11.97
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 136-5104
Mfr. Part No.5000RGA1000G3000A
£362.35
Each
Units
Relative 351mbar 1bar 0.2 % Analogue Sea Water - G1/4 0 → 5 V DIN 43650 Type A - 5 ms - 9 → 35 V dc
RS Stock No. 176-7900
Mfr. Part No.XMLP160BC21F
£92.15
Each
Units
- 0bar 160bar 0.1 %, ±0.5 (Measurement) % Analogue Air, Fresh Water, Gas, Hydraulic Oil, Refrigeration Fluid - - 4 → 20 mA EN 175301-803-A 3 Pin Male Connector - ≤2 ms 23 mA 12 → 24 V dc
RS Stock No. 179-9893
Mfr. Part No.XMLK200P2C23
£74.04
Each
Units
Differential - - ±1 % Analogue Fluid - G1/4 4 → 20 mA EN 175301-803-A Male Connector - 5 ms 20 mA 24 V dc
RS Stock No. 136-6004
Mfr. Part No.836P-D2GFGC14PA-D4
£293.00
Each
Units
Relative 0bar 100bar ±1 % Analogue, PNP Gas, Liquid, Steam - G1/4 4 → 20 mA 4-Pin M12 DC Micro Connector IO-LINK - 450 mA 15 → 35 V dc
RS Stock No. 177-8867
Mfr. Part No.XMLP2D5GD11F
£95.00
Each
Units
- 0bar 2.5bar ±0.5 % Analogue Air, Fresh Water, Gas, Hydraulic Oil - - 0.5 → 4.5 V 4 Pin Male Connector M12 - <=2 ms 5 mA 5 V dc
RS Stock No. 146-5287
Mfr. Part No.XMLP600BD71F
£99.75
Each
Units
Differential - 1500bar ±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
RS Stock No. 136-5026
Mfr. Part No.3100R0160S01B000
£96.50
Each
Units
Relative 0bar 160bar 0.25 % Analogue Air Fluid, Hydraulic Fluid, Hydraulic Oil, Oil - G1/4 0 → 5 V 9.4 mm DIN Connector - 1 ms 2 (Sink & Source) mA 8 → 30 V dc
New
RS Stock No. 207-4678
Mfr. Part No.154N-100G-RT
£77.25
Each
Units
Gauge 0psi 100psi - - Gas, Liquid Level - - - - - - - -
RS Stock No. 136-5068
Mfr. Part No.3100S0040G05G000
£102.00
Each
Units
Relative 0bar 40bar 0.25 % Analogue Air Fluid, Hydraulic Fluid, Hydraulic Oil, Oil - G1/4 0 → 10 V Large DIN Connector - 1 ms 2 (Sink & Source) mA 8 → 30 V dc
RS Stock No. 136-5041
Mfr. Part No.3100S0016G01B000
£96.50
Each
Units
Relative 0bar 16bar 0.25 % Analogue Air Fluid, Hydraulic Fluid, Hydraulic Oil, Oil - G1/4 0 → 10 V 9.4 mm DIN Connector - 1 ms 2 (Sink & Source) mA 8 → 30 V dc
RS Stock No. 136-9410
Mfr. Part No.ACW5M129012
£163.00
Each
Units
- 0.07bar 5.2bar - 2CO Air, Hydraulic Oil, Non-Corrosive Fluid - G1/4 - M20 x 1.5 mm Cable Gland - - 5 A @ 24 V 500 V, 600 V
RS Stock No. 176-7890
Mfr. Part No.XMLP100BD21F
£135.00
Each
Units
- 0bar 100bar 0.1 %, ±0.5 (Measurement) % Analogue Air, Fresh Water, Gas, Hydraulic Oil, Refrigeration Fluid - - 4 → 20 mA 4 Pin M12 Male Connector - ≤2 ms 23 mA 12 → 24 V dc
New
RS Stock No. 206-7033
Mfr. Part No.PP - 222 6RT
BrandVega
£268.00
Each
Units
Relative -1bar 60bar 0.3 % Analogue Gas, Vapour - - - - - - - 35 V
RS Stock No. 136-5980
Mfr. Part No.836P-D2GMGB36PA-D4
£293.00
Each
Units
Relative 0bar 25bar ±1 % Analogue, PNP Gas, Liquid, Steam - G1/4 4 → 20 mA 4-Pin M12 DC Micro Connector IO-LINK - 450 mA 15 → 35 V dc
RS Stock No. 162-2084
Mfr. Part No.XMLP100PD230
£67.44
Each
Units
Differential 0psi 100psi ±0.5 % Analogue Air, Fresh Water, Gas, Hydraulic Oil, Refrigeration Fluid - - 4 → 20 mA 4-Pin Male Connector - 2 ms 20 mA 12 → 24 V dc
RS Stock No. 200-6122
Mfr. Part No.MS580301BA01-00
£11.075
Each (In a Tube of 80)
Units
- - - - - - - - - - - - - -