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 Response Time Maximum Current Supply Voltage Interface Housing Material
RS Stock No. 914-8328
Mfr. Part No.DP-101-M-P
BrandPanasonic
MYR498.83
Each
units
Gauge -0.1MPa 0.1MPa - PNP Non-Corrosive Gas G1/8 - Wire Lead 5000 ms 100 mA 12 → 24 V dc - PBT
RS Stock No. 914-8390
Mfr. Part No.DP102EP
BrandPanasonic
MYR514.28
Each
units
Gauge -0.1MPa 1MPa ±1 % Relay Non-Corrosive Gas G1/8 100 mA Wire Lead 2.5 ms - 12 → 24 V dc - PBT
RS Stock No. 169-8085
Mfr. Part No.ADP42510
BrandPanasonic
MYR57.444
Each (In a Tube of 100)
units
Gauge - - ±0.3 % Voltage Air, Fluid - 100±40 mV PCB - 1.5 mA - - -
RS Stock No. 836-8966
Mfr. Part No.ADP42510
BrandPanasonic
MYR52.02
Each
units
Gauge - - ±0.3 % Voltage Air, Fluid - 100±40 mV PCB - 1.5 mA - - -
RS Stock No. 914-8322
Mfr. Part No.DP-101A-M-P
BrandPanasonic
MYR556.35
Each
units
Gauge -100kPa 100kPa - PNP Non-Corrosive Gas G1/8 1 → 5 V dc, 4 → 20 mA Wire Lead 5000 ms 100 mA 12 → 24 V dc - PBT
RS Stock No. 169-8092
Mfr. Part No.ADP51B62
BrandPanasonic
MYR37.103
Each (In a Tube of 100)
units
Gauge - - ±2.5 % Amplified Air - 4 V PCB - 10 mA - - -
RS Stock No. 836-9032
Mfr. Part No.ADP51B62
BrandPanasonic
MYR45.05
Each
units
Gauge - - ±2.5 % Amplified Air - 4 V PCB - 10 mA - - -
RS Stock No. 914-8426
Mfr. Part No.DP-001-P
BrandPanasonic
MYR388.71
Each
units
Gauge -100kPa 100kPa - PNP Air, Non-Corrosive Gas G1/8 - Wire Lead 250 ms 50 mA 12 → 24 V dc - PBT
RS Stock No. 609-9129
Mfr. Part No.DP101EP
BrandPanasonic
MYR448.27
Each
units
Gauge -100kPa 100kPa ±1 % Relay Non-Corrosive Gas G1/8 100 mA Wire Lead 2.5 ms - 12 → 24 V dc - PBT
RS Stock No. 914-8407
Mfr. Part No.DP111AEPJ
BrandPanasonic
MYR637.86
Each
units
Gauge -100kPa 100kPa ±1 % Relay Non-Corrosive Gas G1/8 1 → 5 V dc, 100 mA Wire Lead 2.5 ms - 12 → 24 V dc - PBT
RS Stock No. 914-8369
Mfr. Part No.DP101EP
BrandPanasonic
MYR514.28
Each
units
Gauge -100kPa 100kPa ±1 % Relay Non-Corrosive Gas G1/8 100 mA Wire Lead 2.5 ms - 12 → 24 V dc - PBT
RS Stock No. 914-8334
Mfr. Part No.DP-102-M-P
BrandPanasonic
MYR498.83
Each
units
Gauge -0.1MPa 1MPa - PNP Non-Corrosive Gas G1/8 - Wire Lead 5000 ms 100 mA 12 → 24 V dc - PBT
RS Stock No. 914-8362
Mfr. Part No.DP101M
BrandPanasonic
MYR498.83
Each
units
Gauge -0.1MPa 0.1MPa - NPN-NO/NC Non-Corrosive Gas G1/8 - Wire Lead 5000 ms 100 mA 12 → 24 V dc - PBT
RS Stock No. 914-8423
Mfr. Part No.DP-002-P
BrandPanasonic
MYR388.71
Each
units
Gauge 1MPa 0MPa - PNP Air, Non-Corrosive Gas G1/8 - Wire Lead 250 ms 50 mA 12 → 24 V dc - PBT
RS Stock No. 914-8331
Mfr. Part No.DP-102-FE-P
BrandPanasonic
MYR494.76
Each
units
Gauge -0.1MPa 1MPa - PNP Non-Corrosive Gas G1/8 - Wire Lead 5000 ms 100 mA 12 → 24 V dc - PBT
RS Stock No. 836-9023
Mfr. Part No.ADP5130
BrandPanasonic
MYR113.47
Each
units
Gauge - - ±1.25 % Amplified Air - 4.5 V PCB - 10 mA 5 V dc - -
RS Stock No. 836-9035
Mfr. Part No.ADP51B61
BrandPanasonic
MYR45.60
Each
units
Gauge - - ±2.5 % Amplified Air - 4 V PCB - 10 mA - - -
RS Stock No. 169-8088
Mfr. Part No.ADP5161
BrandPanasonic
MYR84.755
Each (In a Tube of 100)
units
Gauge - - ±1.25 % Amplified Air - 4.5 V PCB - 10 mA 5 V dc - -
RS Stock No. 914-8347
Mfr. Part No.DP101
BrandPanasonic
MYR508.42
Each
units
Gauge - - - NPN-NO/NC Non-Corrosive Gas G1/8 - Wire Lead 5000 ms 100 mA 12 → 24 V dc - PBT
RS Stock No. 914-8404
Mfr. Part No.DP102NP
BrandPanasonic
MYR553.38
Each
units
Gauge -0.1MPa 1MPa - PNP Non-Corrosive Gas NPT 1/8 - Wire Lead 5000 ms 100 mA 12 → 24 V dc - PBT