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. 914-8356
Mfr. Part No.DP101AN
BrandPanasonic
SGD257.49
Each
units
Relative -1bar 1bar - Analogue + NPN-NO/NC Programmable Non-Corrosive Gas NPT 1/8 1 → 5 V dc, 4 → 20 mA Wire Lead - 5000 ms 100 mA 12 → 24 V dc -
RS Stock No. 914-8322
Mfr. Part No.DP-101A-M-P
BrandPanasonic
SGD253.39
Each
units
Relative -1bar 10bar - PNP Non-Corrosive Gas G1/8 1 → 5 V dc, 4 → 20 mA Wire Lead - 5000 ms 100 mA 12 → 24 V dc -
RS Stock No. 914-8426
Mfr. Part No.DP-001-P
BrandPanasonic
SGD227.15
Each
units
Relative -1bar 1bar - PNP Air, Non-Corrosive Gas G1/8 - Wire Lead - 250 ms 50 mA 12 → 24 V dc -
RS Stock No. 914-8328
Mfr. Part No.DP-101-M-P
BrandPanasonic
SGD250.05
Each
units
Relative -1bar 1bar - PNP Non-Corrosive Gas G1/8 - Wire Lead - 5000 ms 100 mA 12 → 24 V dc -
RS Stock No. 914-8344
Mfr. Part No.DP101AEP
BrandPanasonic
SGD159.89
Each
units
Relative -1bar 10bar ±1 % PNP Open Collector Non-Corrosive Gas G1/8 1 → 5 V dc, 100 mA Wire Lead - 2.5 ms - 12 → 24 V dc -
RS Stock No. 836-9004
Mfr. Part No.ADP51A11
BrandPanasonic
SGD27.75
Each
units
Relative - - ±4 % Amplified Air - 2.4 V PCB - - 3 mA 5 V dc -
RS Stock No. 914-8347
Mfr. Part No.DP101
BrandPanasonic
SGD262.20
Each
units
Relative - - - NPN-NO/NC Non-Corrosive Gas G1/8 - Wire Lead - 5000 ms 100 mA 12 → 24 V dc -
RS Stock No. 914-8334
Mfr. Part No.DP-102-M-P
BrandPanasonic
SGD257.55
Each
units
Relative -1bar 10bar - PNP Non-Corrosive Gas G1/8 - Wire Lead - 5000 ms 100 mA 12 → 24 V dc -
RS Stock No. 914-8331
Mfr. Part No.DP-102-FE-P
BrandPanasonic
SGD266.14
Each
units
Relative -1bar 10bar - PNP Non-Corrosive Gas G1/8 - Wire Lead - 5000 ms 100 mA 12 → 24 V dc -
RS Stock No. 914-8417
Mfr. Part No.DP-001
BrandPanasonic
SGD220.53
Each
units
Relative -1bar 1bar - NPN-NO/NC Air, Non-Corrosive Gas G1/8 - Wire Lead - 250 ms 50 mA 12 → 24 V dc -
RS Stock No. 914-8423
Mfr. Part No.DP-002-P
BrandPanasonic
SGD201.65
Each
units
Relative 1MPa 0bar - PNP Air, Non-Corrosive Gas G1/8 - Wire Lead - 250 ms 50 mA 12 → 24 V dc -
RS Stock No. 169-8087
Mfr. Part No.ADP51A11
BrandPanasonic
SGD17.556
Each (In a Tube of 100)
units
Relative - - ±4 % Amplified Air - 2.4 V PCB - - 3 mA 5 V dc -
RS Stock No. 836-9032
Mfr. Part No.ADP51B62
BrandPanasonic
SGD32.95
Each
units
Relative - - ±2.5 % Amplified Air - 4 V PCB - - 10 mA - -
RS Stock No. 914-8397
Mfr. Part No.DP102ANP
BrandPanasonic
SGD189.23
Each
units
Relative -1bar 10bar - PNP Non-Corrosive Gas NPT 1/8 0.6 → 5 V, 2.4 → 20 mA Wire Lead - 5000 ms 100 mA 12 → 24 V dc -
RS Stock No. 914-8394
Mfr. Part No.DP102M
BrandPanasonic
SGD250.05
Each
units
Relative -1bar 10bar - Analogue + PNP-NO/NC Programmable Non-Corrosive Gas G1/8 - Wire Lead - 5000 ms 100 mA 12 → 24 V dc -
RS Stock No. 914-8410
Mfr. Part No.DP112AEPJ
BrandPanasonic
SGD290.43
Each
units
Relative -1bar 10bar ±1 % Relay Non-Corrosive Gas G1/8 0.6 → 5 V, 2.4 → 20 mA Wire Lead - 2.5 ms - 12 → 24 V dc -
RS Stock No. 914-8401
Mfr. Part No.DP111EPJ
BrandPanasonic
SGD292.84
Each
units
Relative -1bar 10bar ±1 % Relay Non-Corrosive Gas G1/8 100 mA Wire Lead - 2.5 ms - 12 → 24 V dc -
RS Stock No. 169-8094
Mfr. Part No.ADP51B63
BrandPanasonic
SGD21.273
Each (In a Tube of 100)
units
Relative - - ±2.5 % Amplified Air - 4 V PCB - - 10 mA - -
RS Stock No. 914-8366
Mfr. Part No.DP101N
BrandPanasonic
SGD168.30
Each
units
Relative -1bar 1bar - NPN-NO/NC Non-Corrosive Gas NPT 1/8 - Wire Lead - 5000 ms 100 mA 12 → 24 V dc -
RS Stock No. 836-8966
Mfr. Part No.ADP42510
BrandPanasonic
SGD27.29
Each
units
Relative - - ±0.3 % Voltage Air, Fluid - 100±40 mV PCB - - 1.5 mA - -