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. 914-8404
Mfr. Part No.DP102NP
BrandPanasonic
TWD4,639.00
Each
units
Relative -1bar 10bar - PNP Non-Corrosive Gas NPT 1/8 - Wire Lead - 5000 ms 100 mA 12 → 24 V dc -
RS Stock No. 914-8322
Mfr. Part No.DP-101A-M-P
BrandPanasonic
TWD3,904.00
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. 169-8088
Mfr. Part No.ADP5161
BrandPanasonic
TWD1,016.70
Each (In a Tube of 100)
units
Relative - - ±1.25 % Amplified Air - 4.5 V PCB - - 10 mA 5 V dc -
RS Stock No. 169-8092
Mfr. Part No.ADP51B62
BrandPanasonic
TWD478.00
Each (In a Tube of 100)
units
Relative - - ±2.5 % Amplified Air - 4 V PCB - - 10 mA - -
RS Stock No. 914-8394
Mfr. Part No.DP102M
BrandPanasonic
TWD3,500.00
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. 914-8353
Mfr. Part No.DP101AM
BrandPanasonic
TWD4,256.00
Each
units
Relative -1bar 1bar - Analogue + NPN-NO/NC Programmable 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. 169-8089
Mfr. Part No.ADP5130
BrandPanasonic
TWD1,016.70
Each (In a Tube of 100)
units
Relative - - ±1.25 % Amplified Air - 4.5 V PCB - - 10 mA 5 V dc -
RS Stock No. 169-8093
Mfr. Part No.ADP51B61
BrandPanasonic
TWD437.10
Each (In a Tube of 100)
units
Relative - - ±2.5 % Amplified Air - 4 V PCB - - 10 mA - -
RS Stock No. 914-8378
Mfr. Part No.DP102
BrandPanasonic
TWD3,568.00
Each
units
Relative -1bar 10bar - PNP-NO/NC Non-Corrosive Gas G1/8 - Wire Lead - 5000 ms 100 mA 12 → 24 V dc -
RS Stock No. 914-8397
Mfr. Part No.DP102ANP
BrandPanasonic
TWD4,184.00
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. 836-9032
Mfr. Part No.ADP51B62
BrandPanasonic
TWD740.00
Each
units
Relative - - ±2.5 % Amplified Air - 4 V PCB - - 10 mA - -
RS Stock No. 914-8423
Mfr. Part No.DP-002-P
BrandPanasonic
TWD3,097.00
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. 169-8085
Mfr. Part No.ADP42510
BrandPanasonic
TWD551.20
Each (In a Tube of 100)
units
Relative - - ±0.3 % Voltage Air, Fluid - 100±40 mV PCB - - 1.5 mA - -
RS Stock No. 914-8381
Mfr. Part No.DP102AEP
BrandPanasonic
TWD3,785.00
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. 914-8407
Mfr. Part No.DP111AEPJ
BrandPanasonic
TWD4,476.00
Each
units
Relative -1bar 1bar ±1 % Relay Non-Corrosive Gas G1/8 1 → 5 V dc, 100 mA Wire Lead - 2.5 ms - 12 → 24 V dc -
RS Stock No. 914-8356
Mfr. Part No.DP101AN
BrandPanasonic
TWD3,971.00
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. 169-8090
Mfr. Part No.ADP5160
BrandPanasonic
TWD1,016.30
Each (In a Tube of 100)
units
Relative - - ±1.25 % Amplified Air - 4.5 V PCB - - 10 mA 5 V dc -
RS Stock No. 914-8429
Mfr. Part No.DP-002
BrandPanasonic
TWD2,460.00
Each
units
Relative 1MPa 0bar - PNP-NO/NC Air, Non-Corrosive Gas G1/8 - Wire Lead - 250 ms 50 mA 12 → 24 V dc -
RS Stock No. 914-8362
Mfr. Part No.DP101M
BrandPanasonic
TWD3,500.00
Each
units
Relative -1bar 1bar - NPN-NO/NC Non-Corrosive Gas G1/8 - Wire Lead - 5000 ms 100 mA 12 → 24 V dc -
RS Stock No. 836-9035
Mfr. Part No.ADP51B61
BrandPanasonic
TWD677.00
Each
units
Relative - - ±2.5 % Amplified Air - 4 V PCB - - 10 mA - -