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 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 - Like 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. 111-5919
Mfr. Part No.PX3AN2BS250PAAAX
BrandHoneywell
TWD1,825.00
Each
units
Absolute 0psi 250psi ±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. 455-5065
Mfr. Part No.SCX01DN
BrandHoneywell
TWD6,938.00
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. 177-5943
Mfr. Part No.SCX01DN
BrandHoneywell
TWD6,173.00
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. 655-8173
Mfr. Part No.26PCCF A2G
BrandHoneywell
TWD1,651.00
Each
units
Relative 0psi 15psi ±0.5 % Wheatstone Bridge Nitrogen Gas, Oxygen, Water - 100 mV dc PCB - 1 ms - 10 V dc -
RS Stock No. 169-7679
Mfr. Part No.26PCCFA2G
BrandHoneywell
TWD29,964.00
1 Box of 25
Box(es)
Relative 0psi 15psi ±0.25 % Wheatstone Bridge Nitrogen Gas, Oxygen - 0 → 100 mV PCB - 1 ms - 2.5 → 16 V dc -
RS Stock No. 286-664
Mfr. Part No.26PCCFA6G
BrandHoneywell
TWD1,283.00
Each
units
Gauge 0psi 15psi ±0.25 % Unamplified Nitrogen Gas, Oxygen - 97 → 103 mV PCB - 1 ms - 10 V dc -
RS Stock No. 286-692
Mfr. Part No.26PCCFA6D
BrandHoneywell
TWD1,651.00
Each
units
Differential 0psi 15psi ±0.25 % Unamplified Nitrogen Gas, Oxygen - 97 → 103 mV 4-Pin Connector - 1 ms - 10 V dc -
RS Stock No. 455-5071
Mfr. Part No.SCX05DN
BrandHoneywell
TWD6,938.00
Each
units
Differential 0psi 5psi ±0.1 % Unamplified Pneumatic Fluid - 59.4 → 60.6 mV Solder Tag - 100 ms - 20 V dc -
RS Stock No. 177-5944
Mfr. Part No.SCX05DN
BrandHoneywell
TWD6,173.00
Each (In a Box of 25)
units
Differential 0psi 5psi ±1 % Wheatstone Bridge Pneumatic Fluid - 0 → 60 mV Solder Tag - 100 μs - 20 V dc -
RS Stock No. 111-5920
Mfr. Part No.PX3AN2BS100PAAAX
BrandHoneywell
TWD1,457.00
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. 235-5790
Mfr. Part No.24PCAFA6D
BrandHoneywell
TWD1,219.00
Each
units
Differential 0psi 1psi ±0.25 % Unamplified Nitrogen Gas, Oxygen, Water - 30 → 60 mV Solder Tag - 1 ms - 10 V dc -
RS Stock No. 821-3689
Mfr. Part No.83282-00000100-05
BrandHoneywell
TWD1,665.00
Each
units
- - - - - - - - - - - - - -
RS Stock No. 228-8533
Mfr. Part No.26PCAFA6G
BrandHoneywell
TWD1,651.00
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. 286-709
Mfr. Part No.26PCDFA6D
BrandHoneywell
TWD1,651.00
Each
units
Differential 0psi 30psi ±0.25 % Unamplified Nitrogen Gas, Oxygen - 97 → 103 mV PCB - 1 ms - 10 V dc -
RS Stock No. 235-5863
Mfr. Part No.24PCFFM6G
BrandHoneywell
TWD1,281.00
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. 111-5924
Mfr. Part No.PX3AG1BH046BSAAX
BrandHoneywell
TWD1,786.00
Each
units
Relative 0bar 46bar ±0.25 % Analogue Air, Brake Fluid, Hydraulic Fluid, Oil, Refrigeration Fluid G1/4 0.5 → 4.5 V Metri-Pack 150 - <2 ms 3 mA 4.75 → 5.25 V dc -
RS Stock No. 235-5885
Mfr. Part No.24PCFFA6D
BrandHoneywell
TWD1,219.00
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. 235-5891
Mfr. Part No.24PCGFM6G
BrandHoneywell
TWD1,281.00
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. 121-8181
Mfr. Part No.26PCDFA6G
BrandHoneywell
TWD1,315.00
Each
units
- - 60psi - - - - - - - - - - -
RS Stock No. 169-7657
Mfr. Part No.26PCDFA6G
BrandHoneywell
TWD1,198.60
Each (In a Box of 25)
units
Relative 0psi 30psi ±0.25 % Unamplified Nitrogen Gas, Oxygen - 0 → 100 mV 4-Pin Connector - 1 ms - 2.5 → 16 V dc -