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 Communication Protocol Response Time Maximum Current Supply Voltage Interface
RS Stock No. 896-8412
Mfr. Part No.3500B700MG01B000
TWD4,293.00
Each
units
Relative - 0.7bar 0.25 % Current Air, Gas, Water G1/4 4 → 20 mA DIN 43650 Type C - - - 10 → 30 V dc -
RS Stock No. 455-4719
Mfr. Part No.3100B1000S2TB000
TWD4,280.00
Each
units
Gauge 0bar 1000bar 0.25 % Analogue Air Fluid, Hydraulic Fluid, Hydraulic Oil, Oil M12 4 → 20 mA DIN 43650 Type C - 1 ms - 8 → 30 V dc -
RS Stock No. 455-4731
Mfr. Part No.3100B1600S2TB000
TWD4,339.00
Each
units
Gauge 0bar 1600bar 0.25 % Analogue Air Fluid, Hydraulic Fluid, Hydraulic Oil, Oil M12 4 → 20 mA DIN 43650 Type A - 1 ms - 8 → 30 V dc -
RS Stock No. 795-4711
Mfr. Part No.3100R0010G01B000
TWD4,280.00
Each
units
Relative 0bar 10bar ±0.25 % Voltage Fluid, Gas G1/4 0 → 5 V DIN 43650 Type A - 1 ms 4.5 mA 7 → 30 V dc -
RS Stock No. 455-4826
Mfr. Part No.3100B1600S2TE000
TWD4,160.00
Each
units
Relative 0bar 1600bar 0.25 % Analogue Air Fluid, Hydraulic Fluid, Hydraulic Oil, Oil M12 4 → 20 mA M12 Connector - 1 ms - 8 → 30 V dc -
RS Stock No. 455-4810
Mfr. Part No.3100B1000S2TE000
TWD4,160.00
Each
units
- 0bar 1000bar 0.25 % - Air Fluid, Hydraulic Fluid, Hydraulic Oil, Oil M12 4 → 20 mA M12 Connector - - - 10 → 36 V dc -
RS Stock No. 896-8424
Mfr. Part No.3500B02B5G01B000
TWD4,293.00
Each
units
Relative - 2.5bar 0.25 % Current Air, Gas, Water G1/4 4 → 20 mA DIN 43650 Type C - - - 10 → 30 V dc -
RS Stock No. 395-7117
Mfr. Part No.2600BGA1019M3HA018
TWD16,301.00
Each
units
Relative 0bar 1bar 0.25 % Amplified - - 4 → 20 mA Wire Lead - 0.5 ms 20 mA 7 → 35 V dc -
RS Stock No. 455-4769
Mfr. Part No.3100R1600S2TB000
TWD4,280.00
Each
units
- 0bar 1600bar 0.25 % Analogue Air Fluid, Hydraulic Fluid, Hydraulic Oil, Oil M12 0 → 5 V DIN 43650 Type C - 1 ms - 7 → 30 V dc -
RS Stock No. 896-8522
Mfr. Part No.3500R350MG01B000
TWD4,353.00
Each
units
Relative - 0.35bar 0.25 % Voltage Air, Gas, Water G1/4 0 → 5 V DIN 43650 Type C - - - 30 V dc -
RS Stock No. 896-8428
Mfr. Part No.3500B0004G01B000
TWD4,293.00
Each
units
Relative - 4bar 0.25 % Current Air, Gas, Water G1/4 4 → 20 mA DIN 43650 Type C - - - 10 → 30 V dc -
RS Stock No. 779-4200
Mfr. Part No.PS61-10-4MGZ-A-SP
TWD1,075.00
Each
units
- 15psi 60psi - SPST-NO Hydraulic BSP 1/4 - Spade Terminal - - 100 VA 42 V dc -
RS Stock No. 455-4747
Mfr. Part No.3100B2200S2TB000
TWD4,339.00
Each
units
Gauge 0bar 2200bar 0.25 % Analogue Air Fluid, Hydraulic Fluid, Hydraulic Oil, Oil M12 4 → 20 mA DIN 43650 Type C - 1 ms - 8 → 30 V dc -
RS Stock No. 896-8503
Mfr. Part No.3500B0006A01G000
TWD5,261.00
Each
units
Absolute - 6bar 0.25 % Current Air, Gas, Water G1/4 4 → 20 mA DIN 43650 Type A - - - 10 → 30 V dc -
RS Stock No. 896-8507
Mfr. Part No.3500B0010A01G000
TWD5,261.00
Each
units
Absolute - 10bar 0.25 % Current Air, Gas, Water G1/4 4 → 20 mA DIN 43650 Type A - - - 10 → 30 V dc -
RS Stock No. 896-8538
Mfr. Part No.3500R02B5G01B000
TWD4,353.00
Each
units
Relative - 2.5bar 0.25 % Voltage Air, Gas, Water G1/4 0 → 5 V DIN 43650 Type C - - - 30 V dc -
RS Stock No. 535-1145
Mfr. Part No.5266050LBHTI
TWD6,039.00
Each
units
Differential -50Pa 50Pa ±1 % Analogue Air, Non-Conductive Gas - 4 → 20 mA Terminal Strip - 1 s - 24 V dc -
RS Stock No. 535-1252
Mfr. Part No.526610CLBACTI
TWD6,039.00
Each
units
Differential -1000Pa 1000Pa ±1 % Analogue Air, Non-Conductive Gas - 0 → 10 V Terminal Strip - 1 s - 24 V ac/dc -
RS Stock No. 896-8513
Mfr. Part No.3500B0040A01G000
TWD5,261.00
Each
units
Absolute - 40bar 0.25 % Current Air, Gas, Water G1/4 4 → 20 mA DIN 43650 Type A - - - 10 → 30 V dc -
RS Stock No. 136-5104
Mfr. Part No.5000RGA1000G3000A
TWD15,820.00
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 -