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 Response Time Maximum Current Supply Voltage Interface Housing Material
RS庫存編號 395-7123
製造零件編號2600BGA2519M3JA003
HK$4,503.51
單位
Gauge 0bar 2.5bar 0.25 % - - - 4 → 20 mA Wire Lead 0.5 ms - 7 → 35 V dc - Stainless Steel
RS庫存編號 398-6991
製造零件編號0184458031042
BrandSuco
HK$562.48
單位
- 1bar 10bar - Relay Air, Heating Oil, Hydraulic Fluid, Turpentine G1/4 - DIN 46350 Connector - 4 A 250 V - Zinc Plated Steel
RS庫存編號 398-7045
製造零件編號0166407031027
BrandSuco
HK$279.71
單位
- 1bar 10bar - Relay Air, Heating Oil, Hydraulic Fluid, Turpentine G1/4 - Spade Terminal - - 42 V - Zinc Plated Steel
RS庫存編號 317-443
製造零件編號6753-0002
BrandHerga
HK$298.30
單位
- - 0.072psi ±2.5 % - Air - - Spade Terminal - - 250 V ac - Nylon
RS庫存編號 410-6231
製造零件編號404304/000-414-406-02-298
BrandJumo
HK$2,133.17
單位
Differential, Gauge 0mbar 100mbar - Analogue Non-Aggressive Gas - 4 → 20 mA M12 Connector - - 230 V ac - -
RS庫存編號 795-4711
製造零件編號3100R0010G01B000
HK$930.38
單位
Gauge 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 - Stainless Steel
RS庫存編號 455-4624
製造零件編號3100B0010G01B000
HK$1,480.01
單位
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庫存編號 797-5021
BrandRS PRO
HK$1,227.06
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 - Stainless Steel
RS庫存編號 399-1612
製造零件編號XMAV06L2135
HK$694.54
單位
Differential 1bar 6bar 3.5 % Relay Air, Fresh Water, Sea Water G1/4 - Screw Terminals - 3 A ac, 100 mA dc 120 → 240 V ac, 250 V dc - PC
RS庫存編號 302-5838
製造零件編號XMLA010A2S11
HK$1,253.24
單位
Differential 0.6bar 10bar 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 - Zinc Alloy
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 - Stainless Steel
RS庫存編號 746-3492
製造零件編號X5072-TB-A1-CA-H1-PA 100 bar SG
BrandDruck
HK$3,660.31
單位
Sealed Gauge - 100bar ±0.2 % Analogue Fluid G1/4 4 → 20 mA DIN 43650 Type A 10 ms 20 mA 7 → 28 V - Stainless Steel
RS庫存編號 896-8522
製造零件編號3500R350MG01B000
HK$1,134.58
單位
Gauge - 350mbar 0.25 % Voltage Air, Gas, Water G1/4 0 → 5 V DIN 43650 Type C - - 30 V dc - Stainless Steel
RS庫存編號 896-8471
製造零件編號3500B02B5A01B000
HK$1,441.25
單位
Absolute - 2.5bar 0.25 % Current Air, Gas, Water G1/4 4 → 20 mA DIN 43650 Type C - - 10 → 30 V dc - Stainless Steel
RS庫存編號 313-5301
製造零件編號14X1SA1GV1
BrandVega
HK$2,126.99
單位
Gauge 0bar 0.1bar 0.3 % - Fluid, Gas, Vapour G1/2 4 → 20 mA DIN 43650 Connector - - 12 → 36 V dc - Nickel Plated Brass
RS庫存編號 313-5345
製造零件編號14X1FA1GV1
BrandVega
HK$2,126.99
單位
Gauge 0bar 10bar 0.3 % - Fluid, Gas, Vapour G1/2 4 → 20 mA DIN 43650 Connector - - 12 → 36 V dc - Nickel Plated Brass
RS庫存編號 324-1018
製造零件編號XMLB010A2S11
HK$1,776.81
單位
Differential 0.7bar 10bar 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 - Zinc Alloy
RS庫存編號 399-1628
製造零件編號XMAV12L2135
HK$630.92
單位
Differential 1.3bar 12bar 3.5 % Relay Air, Fresh Water, Sea Water G1/4 - Screw Terminals - 3 A ac, 100 mA dc 120 → 240 V ac, 250 V dc - PC
RS庫存編號 914-8369
製造零件編號DP101EP
BrandPanasonic
HK$920.45
單位
Gauge -100kPa 100kPa ±1 % Relay Non-Corrosive Gas G1/8 100 mA Wire Lead 2.5 ms - 12 → 24 V dc - PBT
RS庫存編號 199-399
製造零件編號XMPA12C2131
HK$363.30
單位
Differential 1.3bar 12bar 3.5 % - Air, Fresh Water, Sea Water G1/4 - PG13.5 Cable Gland - 1.5 A - - Fibreglass