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 Communication Protocol Response Time Maximum Current Supply Voltage
RS Stock No. 177-5942
Mfr. Part No.40PC150G2A
BrandHoneywell
kr 565,10
Each (In a Tray of 10)
Units
Gauge 0psi 150psi ±0.2 % Amplified Gas - - 0.5 → 4.5 V PCB - 1 ms 10 mA 4.75 → 5.25 V dc
RS Stock No. 667-0917
Mfr. Part No.40PC150G2A
BrandHoneywell
kr 492,82
Each
Units
Gauge 0psi 150psi 0.8 % Amplified Gas - - 0.5 mA PCB - 1 ms - 5 V dc
RS Stock No. 831-5707
Mfr. Part No.PX2AN2XX150PAAAX
BrandHoneywell
kr 651,42
Each
Units
Absolute 0psi 150psi ±0.25 % Analogue Air, Brake Fluid, Hydraulic Fluid, Oil, Refrigeration Fluid - NPT 1/8 0.5 → 4.5 V Metri-Pack 150 - <2 ms 5 mA 4.75 → 5.25 V dc
RS Stock No. 177-5943
Mfr. Part No.SCX01DN
BrandHoneywell
kr 1 247,742
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. 235-5778
Mfr. Part No.24PCEFA6D
BrandHoneywell
kr 284,44
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. 455-5065
Mfr. Part No.SCX01DN
BrandHoneywell
kr 1 435,58
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. 821-4014
Mfr. Part No.MLH100PGL06A
BrandHoneywell
kr 904,39
Each
Units
Gauge 0psi 100psi ±0.25 % Amplified Fluid - NPT 1/8 0.5 4.5 V Wire Lead - <2 ms 8 mA 4.75 5.25 V dc
RS Stock No. 455-5166
Mfr. Part No.SDX01D4
BrandHoneywell
kr 629,71
Each
Units
Differential 0psi 1psi ±0.2 % Unamplified Gas - - 17.37 → 18.18 mV PCB - 100 μs - 20 V dc
RS Stock No. 181-2107
Mfr. Part No.142PC05D
BrandHoneywell
kr 3 830,87
Each
Units
Differential 0psi 5psi ±1.5 % Amplified Gas - - 1 6 V PCB - 1 ms 20 mA 7 16 V dc
RS Stock No. 177-5948
Mfr. Part No.SDX01D4
BrandHoneywell
kr 564,673
Each (In a Box of 25)
Units
Differential 0psi 1psi ±0.2 % Wheatstone Bridge Gas - - 0 → 18 mV PCB - 100 μs - 20 V dc
RS Stock No. 178-5702
Mfr. Part No.PBN1B332-A
BrandHoneywell
kr 204,12
Each
Units
Gauge - 1.24mbar - Relay Air - - - Tab - - 40 mA 30 V ac/dc
RS Stock No. 111-5920
Mfr. Part No.PX3AN2BS100PAAAX
BrandHoneywell
kr 470,48
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. 111-5919
Mfr. Part No.PX3AN2BS250PAAAX
BrandHoneywell
kr 481,75
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. 169-7679
Mfr. Part No.26PCCFA2G
BrandHoneywell
kr 300,672
1 Box of 25
Box(es)
Gauge 0psi 15psi ±0.25 % Wheatstone Bridge Nitrogen Gas, Oxygen - - 0 → 100 mV PCB - 1 ms - 2.5 → 16 V dc
RS Stock No. 235-5790
Mfr. Part No.24PCAFA6D
BrandHoneywell
kr 292,22
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. 169-7680
Mfr. Part No.26PCDFA2G
BrandHoneywell
kr 340,703
Each (In a Box of 25)
Units
Gauge 0psi 30psi ±0.25 % Wheatstone Bridge Nitrogen Gas, Oxygen - - 0 → 100 mV PCB - 1 ms - 2.5 → 16 V dc
RS Stock No. 235-5807
Mfr. Part No.24PCBFA6G
BrandHoneywell
kr 284,44
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. 181-2113
Mfr. Part No.142PC15D
BrandHoneywell
kr 3 846,13
Each
Units
Differential 0psi 15psi ±0.75 % Amplified Gas - - 1 6 V PCB - 1 ms 20 mA 7 16 V dc
RS Stock No. 177-5938
Mfr. Part No.26PCBFB6G
BrandHoneywell
kr 379,718
Each (In a Box of 5)
Units
Gauge 0psi 5psi ±0.25 % Wheatstone Bridge Nitrogen Gas, Oxygen - - 0 → 50 mV 4-Pin Connector - 1 ms - 2.5 → 16 V dc
RS Stock No. 286-664
Mfr. Part No.26PCCFA6G
BrandHoneywell
kr 298,70
Each
Units
Gauge 0psi 15psi ±0.25 % Unamplified Nitrogen Gas, Oxygen - - 97 → 103 mV PCB - 1 ms - 10 V dc