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. 914-8369
Mfr. Part No.DP101EP
BrandPanasonic
HK$920.45
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. 914-8372
Mfr. Part No.DP102A
BrandPanasonic
HK$1,024.65
Each
units
Gauge -0.1MPa 1MPa - Analogue + PNP-NO/NC Programmable Non-Corrosive Gas G1/8 0.6 → 5 V, 2.4 → 20 mA Wire Lead 5000 ms 100 mA 12 → 24 V dc - PBT
RS Stock No. 914-8417
Mfr. Part No.DP-001
BrandPanasonic
HK$663.87
Each
units
Gauge -0.1MPa 0.1MPa - NPN-NO/NC Air, Non-Corrosive Gas G1/8 - Wire Lead 250 ms 50 mA 12 → 24 V dc - PBT
RS Stock No. 836-9004
Mfr. Part No.ADP51A11
BrandPanasonic
HK$111.04
Each
units
Gauge - - ±4 % Amplified Air - 2.4 V PCB - 3 mA 5 V dc - -
RS Stock No. 914-8429
Mfr. Part No.DP-002
BrandPanasonic
HK$671.97
Each
units
Gauge 1MPa 0MPa - PNP-NO/NC Air, Non-Corrosive Gas G1/8 - Wire Lead 250 ms 50 mA 12 → 24 V dc - PBT
RS Stock No. 169-8087
Mfr. Part No.ADP51A11
BrandPanasonic
HK$74.858
Each (In a Tube of 100)
units
Gauge - - ±4 % Amplified Air - 2.4 V PCB - 3 mA 5 V dc - -
RS Stock No. 914-8423
Mfr. Part No.DP-002-P
BrandPanasonic
HK$671.97
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. 169-8088
Mfr. Part No.ADP5161
BrandPanasonic
HK$149.384
Each (In a Tube of 100)
units
Gauge - - ±1.25 % Amplified Air - 4.5 V PCB - 10 mA 5 V dc - -
RS Stock No. 914-8410
Mfr. Part No.DP112AEPJ
BrandPanasonic
HK$1,154.21
Each
units
Gauge -0.1MPa 1MPa ±1 % Relay Non-Corrosive Gas G1/8 0.6 → 5 V, 2.4 → 20 mA Wire Lead 2.5 ms - 12 → 24 V dc - PBT
RS Stock No. 836-9032
Mfr. Part No.ADP51B62
BrandPanasonic
HK$79.37
Each
units
Gauge - - ±2.5 % Amplified Air - 4 V PCB - 10 mA - - -
RS Stock No. 914-8322
Mfr. Part No.DP-101A-M-P
BrandPanasonic
HK$998.48
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. 914-8344
Mfr. Part No.DP101AEP
BrandPanasonic
HK$1,024.65
Each
units
Gauge -100kPa 100kPa ±1 % PNP Open Collector Non-Corrosive Gas G1/8 1 → 5 V dc, 100 mA Wire Lead 2.5 ms - 12 → 24 V dc - PBT
RS Stock No. 169-8085
Mfr. Part No.ADP42510
BrandPanasonic
HK$101.249
Each (In a Tube of 100)
units
Gauge - - ±0.3 % Voltage Air, Fluid - 100±40 mV PCB - 1.5 mA - - -
RS Stock No. 914-8413
Mfr. Part No.DP112EPJ
BrandPanasonic
HK$1,059.38
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. 914-8426
Mfr. Part No.DP-001-P
BrandPanasonic
HK$671.97
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. 914-8366
Mfr. Part No.DP101N
BrandPanasonic
HK$834.52
Each
units
Gauge -0.1MPa 0.1MPa - NPN-NO/NC Non-Corrosive Gas NPT 1/8 - Wire Lead 5000 ms 100 mA 12 → 24 V dc - PBT
RS Stock No. 914-8356
Mfr. Part No.DP101AN
BrandPanasonic
HK$1,015.73
Each
units
Gauge -0.1MPa 0.1MPa - 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 - PBT
RS Stock No. 914-8353
Mfr. Part No.DP101AM
BrandPanasonic
HK$1,007.28
Each
units
Gauge -0.1MPa 0.1MPa - 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 - PBT
RS Stock No. 836-9023
Mfr. Part No.ADP5130
BrandPanasonic
HK$212.46
Each
units
Gauge - - ±1.25 % Amplified Air - 4.5 V PCB - 10 mA 5 V dc - -
RS Stock No. 914-8407
Mfr. Part No.DP111AEPJ
BrandPanasonic
HK$1,144.77
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