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 Calibrated Process Connection Analogue Output Electrical Connection Response Time Maximum Current Supply Voltage Interface
RS Stock No. 235-5891
Mfr. Part No.24PCGFM6G
BrandHoneywell
£28.86
Each
Units
Gauge 0psi 250psi 0.2 % Unamplified Nitrogen Gas, Oxygen, Water - - 145 → 280 mV Solder Tag 1 ms - 10 V dc -
RS Stock No. 235-5835
Mfr. Part No.24PCCFA6D
BrandHoneywell
£27.55
Each
Units
Differential 0psi 15psi 0.2 % Unamplified Nitrogen Gas, Oxygen, Water - - 165 → 285 mV Solder Tag 1 ms - 10 V dc -
RS Stock No. 235-5885
Mfr. Part No.24PCFFA6D
BrandHoneywell
£27.19
Each
Units
Differential 0psi 100psi 0.2 % Unamplified Nitrogen Gas, Oxygen, Water - - 156 → 294 mV Solder Tag 1 ms - 10 V dc -
RS Stock No. 286-664
Mfr. Part No.26PCCFA6G
BrandHoneywell
£26.51
Each
Units
Gauge 0psi 15psi ±0.25 % Unamplified Nitrogen Gas, Oxygen - - 97 → 103 mV PCB 1 ms - 10 V dc -
RS Stock No. 235-5829
Mfr. Part No.24PCCFA6G
BrandHoneywell
£27.52
Each
Units
Gauge 0psi 15psi 0.2 % Unamplified Nitrogen Gas, Oxygen, Water - - 165 → 285 mV Solder Tag 1 ms - 10 V dc -
RS Stock No. 235-5807
Mfr. Part No.24PCBFA6G
BrandHoneywell
£28.07
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. 177-5943
Mfr. Part No.SCX01DN
BrandHoneywell
£95.038
Each (In a Box of 25)
Units
Differential 0psi 1psi ±1 % Wheatstone Bridge Pneumatic Fluid - - 0 → 18 mV Solder Tag 100 μs - 20 V dc -
RS Stock No. 455-5065
Mfr. Part No.SCX01DN
BrandHoneywell
£175.36
Each
Units
Differential 0psi 1psi ±0.1 % Unamplified Pneumatic Fluid - - 17.82 → 18.18 mV Solder Tag 100 ms - 20 V dc -
RS Stock No. 395-235
Mfr. Part No.164PC01D76
BrandHoneywell
£362.94
Each
Units
Differential 0in wg 5in wg ±2 % Amplified Gas - - 1 → 6 V Solder Tag 1 ms 20 mA 6 → 16 V dc -
RS Stock No. 169-7636
Mfr. Part No.164PC01D76
BrandHoneywell
£369.096
Each (In a Box of 30)
Units
Differential 0in wg 5in wg ±2 % Amplified Gas - - 5.9 → 6.1 V Solder Tag 1 ms - 8 V dc -
RS Stock No. 293-8339
Mfr. Part No.40PC015G1A
BrandHoneywell
£61.69
Each
Units
Gauge 0psi 15psi ±0.4 % Amplified Gas - - 0.5 → 4.5 V PCB 1 ms 10 mA 4.75 → 5.25 V dc -
RS Stock No. 111-5920
Mfr. Part No.PX3AN2BS100PAAAX
BrandHoneywell
£48.09
Each
Units
Absolute 0psi 100psi ±0.25 % Analogue Air, Brake Fluid, Hydraulic Fluid, Oil, Refrigeration Fluid - NPT 1/8 0.5 → 4.5 V Metri-Pack 150 <2 ms 3 mA 4.75 → 5.25 V dc -
RS Stock No. 235-5863
Mfr. Part No.24PCFFM6G
BrandHoneywell
£28.86
Each
Units
Gauge 0psi 100psi 0.2 % Unamplified Nitrogen Gas, Oxygen, Water - - 156 → 294 mV Solder Tag 1 ms - 10 V dc -
RS Stock No. 181-1362
Mfr. Part No.24PCCFA2G
BrandHoneywell
£27.52
Each
Units
Gauge 0psi 15psi 0.2 % Wheatstone Bridge Nitrogen Gas, Oxygen, Water - - 0 → 225 mV Solder Tag 1 ms - 2.5 → 12 V dc -
RS Stock No. 181-1356
Mfr. Part No.24PCBFA2G
BrandHoneywell
£10.99
Each
Units
Gauge 0psi 5psi 0.2 % Wheatstone Bridge Nitrogen Gas, Oxygen, Water - - 0 → 115 mV Solder Tag 1 ms - 2.5 → 12 V dc -
RS Stock No. 235-5778
Mfr. Part No.24PCEFA6D
BrandHoneywell
£27.52
Each
Units
Differential 0psi 0.5psi 0.2 % Unamplified Nitrogen Gas, Oxygen, Water - - 25 → 45 mV Solder Tag 1 ms - 10 V dc -
RS Stock No. 286-658
Mfr. Part No.26PCBFA6G
BrandHoneywell
£40.50
Each
Units
Gauge 0psi 5psi ±0.25 % Unamplified Nitrogen Gas, Oxygen - - 47 → 53 mV PCB 1 ms - 10 V dc -
RS Stock No. 228-8533
Mfr. Part No.26PCAFA6G
BrandHoneywell
£41.32
Each
Units
Gauge 0psi 1psi ±0.25 % Unamplified Nitrogen Gas, Oxygen - - 14.7 → 18.7 mV 4-Pin Connector 1 ms - 10 V dc -
RS Stock No. 216-6253
Mfr. Part No.26PCAFA6D
BrandHoneywell
£41.32
Each
Units
Differential 0psi 1psi ±0.25 % Unamplified Nitrogen Gas, Oxygen - - 14.7 → 18.7 mV 4-Pin Connector 1 ms - 10 V dc -
RS Stock No. 286-709
Mfr. Part No.26PCDFA6D
BrandHoneywell
£41.32
Each
Units
Differential 0psi 30psi ±0.25 % Wheatstone Bridge Nitrogen Gas, Oxygen - - 0 → 100 mV 4-Pin Connector 1 ms - 2.5 → 16 V dc -