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. 124-2128
Mfr. Part No.9013FSG2J24
BrandSquare D
PHP3,243.02
Each
units
Differential 15 (Approximate) psi, 20 (Rising) psi 30 (Approximate) psi, 65 (Rising) psi ±3 (Repeat) % 2NC Fresh Water 0.25 in NPSF - Screw Clamp - - - - -
RS Stock No. 235-5885
Mfr. Part No.24PCFFA6D
BrandHoneywell
PHP1,849.63
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. 748-4723
Mfr. Part No.ZSE40AF-01-R
BrandSMC
PHP12,592.43
Each
units
Vacuum -100kPa 100kPa ±0.2 % Analogue Gas BSP 1/8 1 → 5 V, 4 → 20 mA Wire Lead - 2.5 ms 45 mA 12 → 24 V dc -
RS Stock No. 235-5891
Mfr. Part No.24PCGFM6G
BrandHoneywell
PHP1,942.75
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. 455-4624
Mfr. Part No.3100B0010G01B000
PHP10,546.97
Each
units
Gauge 0bar 10bar 0.25 % Analogue Air Fluid, Hydraulic Fluid, Hydraulic Oil, Oil G1/4 4 → 20 mA DIN 43650 Type C - 1 ms - 10 → 30 V dc -
RS Stock No. 313-5345
Mfr. Part No.14X1FA1GV1
BrandVega
PHP19,000.13
Each
units
Relative 0bar 10bar 0.3 % - Fluid, Gas, Vapour G1/2 4 → 20 mA DIN 43650 Connector - - - 12 → 36 V dc -
RS Stock No. 111-5919
Mfr. Part No.PX3AN2BS250PAAAX
BrandHoneywell
PHP8,108.95
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. 821-3689
Mfr. Part No.83282-00000100-05
BrandHoneywell
PHP1,948.04
Each
units
- - - - - - - - - - - - - -
RS Stock No. 124-2124
Mfr. Part No.9013FHG2J27
BrandSquare D
PHP2,574.50
Each
units
Differential 40 (Rising)psi 100 (Rising)psi ±3 (Repeat) % 2NC Air 0.25 in NPSF - Screw Clamp - - - - -
RS Stock No. 788-4921
Mfr. Part No.2SMPP-02
BrandOmron
PHP191.91
Each (In a Pack of 2)
units
Relative 0bar 37kPa - Amplified Air - - PCB - - 130 μA - -
RS Stock No. 739-6721
Mfr. Part No.PK7524
PHP12,880.05
Each
units
Relative 0bar 10bar <±2.5 % PNP-2NO Gas, Liquid G1/4 - M12 Connector - - 500 mA 9.6 → 32 V dc -
RS Stock No. 779-4204
Mfr. Part No.PS61-20-4MGZ-A-SP
PHP1,964.42
Each
units
- 40psi 150psi - SPST-NO Hydraulic BSP 1/4 - Spade Terminal - - 100 VA 42 V dc -
RS Stock No. 820-7035
Mfr. Part No.6742-0052
BrandHerga
PHP3,930.40
Each
units
- 60psi 120psi ±10 % SPCO Air, Gas, Liquid, Oil BSP 1/8 - Spade Terminal - - 21 A 220 V dc, 250 V ac -
RS Stock No. 324-0986
Mfr. Part No.XMLA300D2S11
PHP30,193.70
Each
units
Differential 20bar 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. 177-4880
Mfr. Part No.2SMPP-02
BrandOmron
PHP169.785
Each (In a Tube of 112)
units
- - - - - - - - - - - - - -
RS Stock No. 455-4646
Mfr. Part No.3100B0025G01B000
PHP7,597.84
Each
units
- 0bar 25bar 0.25 % - Air Fluid, Hydraulic Fluid, Hydraulic Oil, Oil G1/4 4 → 20 mA DIN 43650 Type C - - - 10 → 36 V dc -
RS Stock No. 835-3857
Mfr. Part No.PG2451
PHP30,340.18
Each
units
Relative 0bar 250bar ±0.6 % Analogue + PNP-NO/NC Programmable Gas, Liquid G1/2 4 → 20 mA M12 Connector - 9 ms, 28 ms 250 mA 18 → 32 V dc -
RS Stock No. 835-2845
Mfr. Part No.XMLR010G2P05
PHP24,767.71
Each
units
Differential 0bar 10bar ≤0.1 % 2x PNP-NO/NC Air, Fresh Water, Hydraulic Oil, Refrigerator Fluid G1/4 - M12 Connector - ≤5 ms ≤50 mA 24 V dc -
RS Stock No. 835-3860
Mfr. Part No.PG2456
PHP30,340.18
Each
units
Relative -0.125bar 2.5bar ±0.5 % Analogue + PNP-NO/NC Programmable Gas, Liquid G1/2 4 → 20 mA M12 Connector - 9 ms, 28 ms 250 mA 18 → 32 V dc -
RS Stock No. 235-5863
Mfr. Part No.24PCFFM6G
BrandHoneywell
PHP1,942.75
Each
units
Gauge 0psi 100psi 0.2 % Unamplified Nitrogen Gas, Oxygen, Water - 156 → 294 mV Solder Tag - 1 ms - 10 V dc -