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. 175-5010
BrandRS PRO
PHP12,502.32
Each
units
Relative 0bar 0.25bar ±0.25 % Analogue - G1/4 4 → 20 mA M12 Connector - - 20 mA 9 → 32 V dc -
RS Stock No. 102-4125
BrandRS PRO
PHP15,875.18
Each
units
Relative -1bar 9bar ±0.25 % Analogue Gas, Liquid G1/4 4 → 20 mA DIN 43650 Type A - - - 9 → 32 V dc -
RS Stock No. 175-5006
BrandRS PRO
PHP15,496.85
Each
units
Relative 0bar 50mbar ±0.25 % Analogue - G1/4 4 → 20 mA M12 Connector - - 20 mA 9 → 32 V dc -
RS Stock No. 828-5707
BrandRS PRO
PHP18,443.20
Each
units
Relative 0bar 50mbar <±0.25 % Current Oil, Water G1/4 4 → 20 mA DIN 43650 Type A - - 28 mA 9 → 32 V dc -
RS Stock No. 828-5704
BrandRS PRO
PHP16,106.82
Each
units
Absolute 0bar 1bar ±0.5 % Current Oil, Water G1/4 4 → 20 mA DIN 43650 Type A - - 28 mA 9 → 32 V dc -
RS Stock No. 828-5710
BrandRS PRO
PHP11,531.79
Each
units
Relative 0bar 0.1bar <±0.25 % Current Oil, Water G1/4 4 → 20 mA DIN 43650 Type A - - 28 mA 9 → 32 V dc -
RS Stock No. 175-5038
BrandRS PRO
PHP8,627.71
Each
units
Relative 0psi 75psi ±0.25 % Analogue - NPT 1/4 4 → 20 mA M12 Connector - - 20 mA 9 → 32 V dc -
RS Stock No. 797-5030
BrandRS PRO
PHP11,446.70
Each
units
Relative 0bar 25bar ±0.25 % Voltage Air, Gas, Hydraulic Fluid, Liquid, Water G1/4 0 → 5 V DIN 43650 Type C - - - 9 → 32 V dc -
RS Stock No. 102-4153
BrandRS PRO
PHP35,386.20
Each
units
Relative 0bar 50mbar ±0.25 % Analogue Oil G1/4 4 → 20 mA DIN 43650 Type A - - 28 mA 9 → 32 V dc -
RS Stock No. 123-5235
BrandRS PRO
PHP22,176.20
Each
units
Relative 0bar 10bar ±0.25 % Analogue Air, Hydraulic Fluid, Liquid, Non-Aggressive Gas, Oil, Water G1/4 0 → 5 V, 4 → 20 mA Battery - - - - -
RS Stock No. 175-4997
BrandRS PRO
PHP8,627.71
Each
units
Relative 0bar 40bar ±0.25 % Analogue - G1/4 4 → 20 mA M12 4-pin - - 20 mA 9 → 32 V dc -
RS Stock No. 175-5040
BrandRS PRO
PHP8,627.71
Each
units
Relative 0psi 100psi ±0.25 % Analogue - NPT 1/4 4 → 20 mA M12 Connector - - 20 mA 9 → 32 V dc -
RS Stock No. 123-5244
BrandRS PRO
PHP33,462.98
Each
units
Relative 0bar 0.1bar ±0.25 % Analogue Air, Hydraulic Fluid, Liquid, Non-Aggressive Gas, Oil, Water G1/4 0 → 5 V, 4 → 20 mA Battery - - - - -
RS Stock No. 102-4143
BrandRS PRO
PHP31,408.33
Each
units
Relative 0bar 50bar ±0.25 % Analogue Grey Water, Sewage, Viscous Fluid G3/4 4 → 20 mA M12 4-pin - - 28 mA 12 → 28 V dc -
RS Stock No. 175-5042
BrandRS PRO
PHP8,627.71
Each
units
Relative 0psi 150psi ±0.25 % Analogue - NPT 1/4 4 → 20 mA M12 Connector - - 20 mA 9 → 32 V dc -
RS Stock No. 797-4961
BrandRS PRO
PHP11,446.70
Each
units
Relative -1bar 24bar ±0.25 % Voltage Air, Gas, Hydraulic Fluid, Liquid, Water G1/4 0 → 5 V DIN 43650 Type C - - - 9 → 32 V dc -
RS Stock No. 175-5015
BrandRS PRO
PHP12,502.32
Each
units
Relative 0bar 0.75bar ±0.25 % Analogue - G1/4 0 → 5 V M12 Connector - - - 9 → 32 V dc -
RS Stock No. 175-5032
BrandRS PRO
PHP9,687.34
Each
units
Relative -14.5psi 350psi ±0.25 % Analogue - NPT 1/4 4 → 20 mA M12 Connector - - 20 mA 9 → 32 V dc -
RS Stock No. 828-5814
BrandRS PRO
PHP12,601.71
Each
units
Relative -1bar 5bar <±0.25 % Current Water G3/4 4 → 20 mA M12 Connector - - 28 mA 9 → 32 V dc -
RS Stock No. 175-4982
BrandRS PRO
PHP9,687.34
Each
units
Relative -1bar 24bar ±0.25 % Analogue - G1/4 0 → 5 V M12 4-pin - - - 9 → 32 V dc -
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