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 Process Connection Analogue Output Electrical Connection Communication Protocol Response Time Maximum Current Supply Voltage Interface
RS庫存編號 797-5021
BrandRS PRO
HK$1,682.76
單位
Gauge 0bar 100bar ±0.25 % Current Air, Gas, Hydraulic Fluid, Liquid, Water BSP 1/4 4 20 mA DIN 43650 Connector - - 20 mA 9 32 V dc -
RS庫存編號 797-5052
BrandRS PRO
HK$1,615.92
單位
Gauge 0bar 25bar ±0.25 % Voltage Air, Gas, Hydraulic Fluid, Liquid, Water BSP 1/4 0 100 mV DIN 43650 Connector - - - 3 12 V dc -
RS庫存編號 797-5011
BrandRS PRO
HK$1,598.63
單位
Gauge 0bar 6bar ±0.25 % Current Air, Gas, Hydraulic Fluid, Liquid, Water BSP 1/4 4 20 mA DIN 43650 Connector - - 20 mA 9 32 V dc -
RS庫存編號 828-5710
BrandRS PRO
HK$1,410.81
單位
Gauge 0mbar 100mbar <±0.25 % Current Oil, Water BSP 1/4 4 20 mA DIN 43650 Connector - - 28 mA 9 32 V dc -
RS庫存編號 797-5043
BrandRS PRO
HK$1,682.76
單位
Gauge 0bar 1bar ±0.25 % Voltage Air, Gas, Hydraulic Fluid, Liquid, Water BSP 1/4 0 5 V DIN 43650 Connector - - - 9 32 V dc -
RS庫存編號 797-4983
BrandRS PRO
HK$1,598.63
單位
Gauge 0bar 1bar ±0.25 % Current Air, Gas, Hydraulic Fluid, Liquid, Water BSP 1/4 4 20 mA DIN 43650 Connector - - 20 mA 9 32 V dc -
RS庫存編號 797-4964
BrandRS PRO
HK$1,598.63
單位
Gauge 0bar 16bar ±0.25 % Voltage Air, Gas, Hydraulic Fluid, Liquid, Water BSP 1/4 0 100 mV DIN 43650 Connector - - - 3 12 V dc -
RS庫存編號 828-5701
BrandRS PRO
HK$1,761.47
單位
Gauge 0mbar 50mbar <±0.25 % Voltage Oil, Water BSP 1/4 0.5 4.5 V DIN 43650 Connector - - 6 mA 9 32 V dc -
RS庫存編號 828-5723
BrandRS PRO
HK$1,453.68
單位
Gauge 0mbar 500mbar <±0.25 % Voltage Oil, Water BSP 1/4 0.5 4.5 V DIN 43650 Connector - - 6 mA 9 32 V dc -
RS庫存編號 828-5707
BrandRS PRO
HK$1,787.40
單位
Gauge 0mbar 50mbar <±0.25 % Current Oil, Water BSP 1/4 4 20 mA DIN 43650 Connector - - 28 mA 9 32 V dc -
RS庫存編號 123-5249
BrandRS PRO
HK$6,154.83
單位
Absolute 0mbar 500mbar ±0.25 % Analogue Air, Hydraulic Fluid, Liquid, Non-Aggressive Gas, Oil, Water G1/4 0 5 V, 4 20 mA Battery - - - - -
RS庫存編號 123-5232
BrandRS PRO
HK$3,265.20
單位
Gauge 0bar 1bar ±0.25 % Analogue Air, Hydraulic Fluid, Liquid, Non-Aggressive Gas, Oil, Water G1/4 0 5 V, 4 20 mA Battery - - - - -
RS庫存編號 123-5241
BrandRS PRO
HK$2,422.88
單位
Gauge 0bar 250bar ±0.25 % Analogue Air, Hydraulic Fluid, Liquid, Non-Aggressive Gas, Oil, Water G1/4 0 5 V, 4 20 mA Battery - - - - -
RS庫存編號 828-5741
BrandRS PRO
HK$1,257.87
單位
Gauge 0bar 16bar <±0.25 % Current Air, Gas, Hydraulic Fluid, Liquid, Water BSP 1/4 4 20 mA DIN 43650 Connector - - 20 mA 9 32 V dc -
RS庫存編號 102-4155
BrandRS PRO
HK$2,382.31
單位
Gauge 0mbar 250mbar ±0.25 % Analogue Oil BSP 1/4 4 20 mA DIN 46350 Connector - - 28 mA 9 32 V dc -
RS庫存編號 175-5034
BrandRS PRO
HK$1,424.12
單位
Gauge 0psi 15psi ±0.25 % Analogue - NPT 1/4 4 20 mA M12 Connector - - 20 mA 9 32 V dc -
RS庫存編號 123-5250
BrandRS PRO
HK$6,154.83
單位
Absolute 0mbar 750mbar ±0.25 % Analogue Air, Hydraulic Fluid, Liquid, Non-Aggressive Gas, Oil, Water G1/4 0 5 V, 4 20 mA Battery - - - - -
RS庫存編號 828-5713
BrandRS PRO
HK$1,761.47
單位
Gauge 0mbar 100mbar <±0.25 % Voltage Oil, Water BSP 1/4 0.5 4.5 V DIN 43650 Connector - - 6 mA 9 32 V dc -
RS庫存編號 175-5011
BrandRS PRO
HK$1,837.94
單位
Gauge 0bar 250mbar ±0.25 % Analogue - BSP 1/4 0 5 V M12 Connector - - - 9 32 V dc -
RS庫存編號 123-5233
BrandRS PRO
HK$1,453.11
單位
Gauge 0bar 6bar ±0.25 % Analogue Air, Hydraulic Fluid, Liquid, Non-Aggressive Gas, Oil, Water G1/4 0 5 V, 4 20 mA Battery - - - - -