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 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 - Like 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. 200-6122
Mfr. Part No.MS580301BA01-00
HK$128.40
Each (In a Tube of 80)
units
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RS Stock No. 200-6125
Mfr. Part No.MS580502BA01-50
HK$69.24
Each (On a Reel of 2000)
units
- - - - - - - - - - - - - -
New
RS Stock No. 207-4677
Mfr. Part No.154N-015G-RT
HK$867.98
Each
units
Gauge 0psi 15psi - Voltage Gas, Liquid Level - - - - - - - -
RS Stock No. 200-6129
Mfr. Part No.MS583730BA01-50
HK$43.75
Each (On a Reel of 5000)
units
- - - - - - - - - - - - - -
RS Stock No. 200-6107
Mfr. Part No.86-015G-C
HK$475.09
Each
units
- - - - - - - - - - - - - -
RS Stock No. 200-6120
Mfr. Part No.MS561101BA03-50
HK$39.376
Each (On a Reel of 3600)
units
- - - - - - - - - - - - - -
RS Stock No. 200-6103
Mfr. Part No.325541009-50
HK$132.46
Each (On a Reel of 1000)
units
- - - - - - - - - - - - - -
New
RS Stock No. 207-4701
Mfr. Part No.M32JM-000105-100PG
HK$372.68
Each
units
Gauge 0psi 100psi 1.5 % I2C Gas, Liquid Level - - - - - - 5 V I2C
RS Stock No. 200-6127
Mfr. Part No.MS583702BA01-50
HK$81.687
Each (On a Reel of 5000)
units
- - - - - - - - - - - - - -
New
RS Stock No. 207-4678
Mfr. Part No.154N-100G-RT
HK$867.98
Each
units
Gauge 0psi 100psi - - Gas, Liquid Level - - - - - - - -
RS Stock No. 200-6130
Mfr. Part No.MS583730BA01-50
HK$69.85
Each
units
- - - - - - - - - - - - - -
RS Stock No. 200-6108
Mfr. Part No.86A3R-000000-005PG
HK$1,365.03
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 207-4698
Mfr. Part No.M327L-000006-500PG
HK$355.24
Each
units
Gauge 0psi 500psi 1.5 % Analogue Gas, Liquid Level - - - - - - 9 V -
RS Stock No. 200-6128
Mfr. Part No.MS583702BA01-50
HK$139.72
Each
units
- - - - - - - - - - - - - -
RS Stock No. 200-6109
Mfr. Part No.DP86-005D
HK$2,319.77
Each
units
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RS Stock No. 200-6124
Mfr. Part No.MS580301BA01-00
HK$192.18
Each
units
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RS Stock No. 200-6121
Mfr. Part No.MS561101BA03-50
HK$81.60
Each
units
- - - - - - - - - - - - - -
RS Stock No. 200-6102
Mfr. Part No.325540009-50
HK$189.78
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 207-4679
Mfr. Part No.20010085-07
HK$343.77
Each
units
Gauge 0bar 1000bar 1.5 % Analogue Gas, Liquid Level M12 - - - - - 9 V -
New
RS Stock No. 207-4699
Mfr. Part No.M32JM-00000E-010BG
HK$372.68
Each
units
Gauge 0bar 10bar 1.5 % I2C Gas, Liquid Level - - - - - - 5 V I2C