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庫存編號 835-3894
製造零件編號PT5404
TWD4,414.00
單位
Relative 0bar 10bar ±0.5 % Analogue Gas, Liquid G1/4 4 → 20 mA M12 Connector - 1 ms - 8.5 → 36 V dc -
RS庫存編號 111-5919
製造零件編號PX3AN2BS250PAAAX
BrandHoneywell
TWD1,825.00
單位
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庫存編號 609-6912
製造零件編號XMLA002A2S11
TWD7,296.00
單位
Differential 0.15bar 2.5bar 2 % Relay Air, Fresh Water, Hydraulic Fluid, Sea Water G1/4 - PG13.5 Cable Gland - - 3 A ac, 100 mA dc 120 → 240 V ac, 250 V dc -
RS庫存編號 748-4723
製造零件編號ZSE40AF-01-R
BrandSMC
TWD6,310.00
單位
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庫存編號 177-5943
製造零件編號SCX01DN
BrandHoneywell
TWD5,599.20
個 (以毎盒:25)
單位
Differential 0psi 1psi ±1 % Wheatstone Bridge Pneumatic Fluid - 0 → 18 mV Solder Tag - 100 μs - 20 V dc -
RS庫存編號 124-2127
製造零件編號9013FSG2J21M4
BrandSquare D
TWD1,685.00
單位
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庫存編號 455-4719
製造零件編號3100B1000S2TB000
TWD4,280.00
單位
Gauge 0bar 1000bar 0.25 % Analogue Air Fluid, Hydraulic Fluid, Hydraulic Oil, Oil M12 4 → 20 mA DIN 43650 Type C - 1 ms - 8 → 30 V dc -
RS庫存編號 455-5065
製造零件編號SCX01DN
BrandHoneywell
TWD6,806.00
單位
Differential 0psi 1psi ±0.1 % Unamplified Pneumatic Fluid - 17.82 → 18.18 mV Solder Tag - 100 ms - 20 V dc -
RS庫存編號 896-8412
製造零件編號3500B700MG01B000
TWD4,293.00
單位
Relative - 0.7bar 0.25 % Current Air, Gas, Water G1/4 4 → 20 mA DIN 43650 Type C - - - 10 → 30 V dc -
RS庫存編號 286-664
製造零件編號26PCCFA6G
BrandHoneywell
TWD1,263.00
單位
Gauge 0psi 15psi ±0.25 % Unamplified Nitrogen Gas, Oxygen - 97 → 103 mV PCB - 1 ms - 10 V dc -
RS庫存編號 818-4623
製造零件編號D6F-PH0505AD3
BrandOmron
TWD1,413.00
單位
Differential -50Pa 50Pa ±3 % I2C Air - - PCB - 33 ms 6 mA 2.3 → 3.6 V dc -
RS庫存編號 324-0992
製造零件編號XMLB002A2S11
TWD6,302.00
單位
Differential 0.3bar 2.5bar 2 % Relay Air, Fresh Water, Hydraulic Fluid, Sea Water G1/4 - PG13.5 Cable Gland - - 3 A ac, 100 mA dc 120 → 240 V ac, 250 V dc -
RS庫存編號 835-3911
製造零件編號PU5401
TWD4,414.00
單位
Relative 0bar 250bar ±0.5 % Analogue Gas, Liquid G1/4 0 → 10 V M12 Connector - 1 ms - 16 → 36 V dc -
RS庫存編號 455-4731
製造零件編號3100B1600S2TB000
TWD4,280.00
單位
Gauge 0bar 1600bar 0.25 % Analogue Air Fluid, Hydraulic Fluid, Hydraulic Oil, Oil M12 4 → 20 mA DIN 43650 Type A - 1 ms - 8 → 30 V dc -
RS庫存編號 169-7679
製造零件編號26PCCFA2G
BrandHoneywell
TWD28,537.00
毎盒:25 個
Box(es)
Relative 0psi 15psi ±0.25 % Wheatstone Bridge Nitrogen Gas, Oxygen - 0 → 100 mV PCB - 1 ms - 2.5 → 16 V dc -
RS庫存編號 655-8173
製造零件編號26PCCF A2G
BrandHoneywell
TWD1,620.00
單位
Relative 0psi 15psi ±0.5 % Wheatstone Bridge Nitrogen Gas, Oxygen, Water - 100 mV dc PCB - 1 ms - 10 V dc -
RS庫存編號 324-1002
製造零件編號XMLB004A2S11
TWD8,563.00
單位
Differential 0.25bar 4bar 2 % Relay Air, Fresh Water, Hydraulic Fluid, Sea Water G1/4 - PG13.5 Cable Gland - - 3 A ac, 100 mA dc 120 → 240 V ac, 250 V dc -
RS庫存編號 124-2160
製造零件編號XMLR400M1P25
TWD12,005.00
單位
Differential 20 (Falling) bar, 32 (Rising) bar 388 (Falling) bar, 400 (Rising) bar ≤0.2 (Repeat) %, ≤0.6 (Output) %, ≤1 (Overall) % Analogue, PNP-NO/NC Air, Fresh Water, Hydraulic Oil, Refrigerator Fluid G1/4 4 → 20 mA M12 4-Pin Connector - ≤10 (Analogue) ms, ≤5 (Discrete) ms ≤50 mA 24 V dc -
RS庫存編號 111-5920
製造零件編號PX3AN2BS100PAAAX
BrandHoneywell
TWD1,423.00
單位
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庫存編號 795-4711
製造零件編號3100R0010G01B000
TWD4,280.00
單位
Relative 0bar 10bar ±0.25 % Voltage Fluid, Gas G1/4 0 → 5 V DIN 43650 Type A - 1 ms 4.5 mA 7 → 30 V dc -