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. 739-6777
Mfr. Part No.PBT-RB010SG1SSNAMA0Z
BrandSick
HK$1,203.68
Each
units
Relative 0bar 10bar ±0.5 % Analogue Fluid, Gas G1/4 4 → 20 mA M12 Connector - 4 ms 25 mA 8 → 30 V dc -
RS Stock No. 613-7732
Mfr. Part No.404366/000-451-405-504-20-61/000
BrandJumo
HK$1,981.29
Each
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Relative 0bar 0.25bar - - Fluid, Gas G1/2 4 20 mA DIN 43650 Connector - - - 10 30 V dc -
RS Stock No. 239-0771
Mfr. Part No.4246-52
BrandNorgren
HK$910.05
Each
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- - 17bar 12 % Relay Air G1/4 - DIN Connector - - 5 A 240 V ac/dc -
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Mfr. Part No.ADP51B62
BrandPanasonic
HK$117.15
Each (In a Tube of 100)
units
Relative - - ±2.5 % Amplified Air - 4 V PCB - - 10 mA - -
RS Stock No. 175-4995
BrandRS PRO
HK$1,274.36
Each
units
Relative 0bar 250bar ±0.25 % Analogue - BSP 1/4 4 → 20 mA DIN 43650 - - 20 mA 9 → 32 V dc -
RS Stock No. 609-7044
Mfr. Part No.XMLB300D2S11
HK$3,668.81
Each
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Differential 22bar 300bar 2 % Relay Hydraulic Fluid G1/4 - PG13.5 Cable Gland - - 3 A ac, 100 mA dc 120 → 240 V ac, 250 V dc -
RS Stock No. 235-5790
Mfr. Part No.24PCAFA6D
BrandHoneywell
HK$307.62
Each
units
Differential 0psi 1psi ±0.25 % Unamplified Nitrogen Gas, Oxygen, Water - 30 → 60 mV Solder Tag - 1 ms - 10 V dc -
New
RS Stock No. 200-6125
Mfr. Part No.MS580502BA01-50
HK$67.816
Each (On a Reel of 2000)
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- - - - - - - - - - - - - -
RS Stock No. 746-3467
Mfr. Part No.X5072-TB-A1-CA-H1-PA 6.0 bar G
BrandDruck
HK$2,308.94
Each
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Relative - 6bar ±0.2 % Analogue Fluid G1/4 4 → 20 mA DIN 43650 Type A - 10 ms 20 mA 7 → 28 V -
RS Stock No. 922-7305
Mfr. Part No.MPVZ4006GW7U
BrandNXP
HK$88.48
Each (In a Tray of 40)
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Relative 0bar 6kPa ±2.46 % Analogue Air - 4.6 V PCB Mount - - - 4.75 → 5.25 V dc -
RS Stock No. 374-8812
Mfr. Part No.787267
BrandBurkert
HK$347.13
Each
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Differential 10bar 70bar - Relay Air, Hydraulic Fluid, Oil Emulsion, Water G1/4 - Spade Terminal - - - - -
RS Stock No. 175-4996
BrandRS PRO
HK$1,274.36
Each
units
Relative 0bar 250bar ±0.25 % Analogue - BSP 1/4 0 → 5 V DIN 43650 - - - 9 → 32 V dc -
RS Stock No. 361-3413
Mfr. Part No.XMLA160D2S12
HK$1,248.90
Each
units
Differential 10bar 160bar 2 % Relay Hydraulic Fluid G1/4 - M20 Cable Gland - - 3 A ac, 100 mA dc 120 240 V ac, 250 V dc -
RS Stock No. 235-5762
Mfr. Part No.24PCEFA6G
BrandHoneywell
HK$307.62
Each
units
Gauge 0psi 0.5psi 0.2 % Unamplified Nitrogen Gas, Oxygen, Water - 25 → 45 mV Solder Tag - 1 ms - 10 V dc -
New
RS Stock No. 190-9717
Mfr. Part No.9023534
BrandWIKA
HK$4,654.36
Each
units
- 0bar 60bar ±0.5 % Current Adhesive, Contaminated Media, Crystallising, Particle-Laden, Paste-Like, Viscous G1/2 4 → 20 mA Angular connector DIN 175301-803 A - - 20 mA 10 → 30 V dc -
RS Stock No. 463-5559
Mfr. Part No.404366/000-491-405-504-20-61/000
BrandJumo
HK$2,958.06
Each
units
Absolute 0bar 4bar 0.5 % Analogue - G1/2 4 20 mA DIN 43650 Connector - - - 10 30 V dc -
RS Stock No. 746-3559
Mfr. Part No.A5074-TB-A1-CA-H1-PA 10.0 bar G
BrandDruck
HK$2,474.70
Each
units
Relative - 10bar ±0.2 % Analogue Fluid G1/4 0 → 5 V DIN 43650 Type A - 10 ms 3 mA 7 → 16 V -
RS Stock No. 463-5622
Mfr. Part No.401001/000-455-405-523-20-601-61/000
BrandJumo
HK$1,748.05
Each
units
- 0bar 1.6bar - - - G1/2 4 20 mA DIN 43650 Connector - - - 10 30 V dc -
RS Stock No. 235-5807
Mfr. Part No.24PCBFA6G
BrandHoneywell
HK$307.62
Each
units
Gauge 0psi 5psi 0.2 % Unamplified Nitrogen Gas, Oxygen, Water - 85 → 145 mV Solder Tag - 1 ms - 10 V dc -
RS Stock No. 175-5032
BrandRS PRO
HK$1,430.88
Each
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Relative -14.5psi 350psi ±0.25 % Analogue - NPT 1/4 4 → 20 mA M12 Connector - - 20 mA 9 → 32 V dc -
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