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 173-2220
製造零件編號SDP1000-L
BrandSensirion
HK$613.114
Each (In a Tray of 25)
單位
Differential -20Pa 500Pa 0.2 %, 1.5 % Analogue Air, Non-Aggressive Gas - 0.25 → 4 V 3 Pin SMD Connector 40 ms 5.2 mA 4.75 → 5.25 V - PPS
RS庫存編號 774-4104
製造零件編號SDP610-500Pa
BrandSensirion
HK$277.87
單位
Differential -500Pa 500Pa 3 % I2C Air, Non-Aggressive Gas - - 4 Pin SMD Connector 4.6 ms 6 mA 2.7 → 3.3 V dc - PBT
RS庫存編號 774-4085
製造零件編號SDP1000-L
BrandSensirion
HK$710.89
單位
Differential -20Pa 500Pa 0.2 %, 1.5 % Analogue Air, Non-Aggressive Gas - 0.25 → 4 V 3 Pin SMD Connector 40 ms 5.2 mA 4.75 → 5.25 V - PPS
RS庫存編號 173-2222
製造零件編號SDP1000-L025
BrandSensirion
HK$750.126
Each (In a Tray of 25)
單位
Differential -62Pa 62Pa 0.6 %, 2 % Analogue Air, Non-Aggressive Gas - 0.2 → 4 V 3 Pin SMD Connector 40 ms 5.2 mA 4.75 → 5.25 V - PPS
RS庫存編號 774-4101
製造零件編號SDP610-025Pa
BrandSensirion
HK$292.77
單位
Differential -25Pa 25Pa 3 % I2C Air, Non-Aggressive Gas - - 4 Pin SMD Connector 4.6 ms 6 mA 2.7 → 3.3 V dc - PBT
RS庫存編號 123-7145
製造零件編號ASP1400
BrandSensirion
HK$2,602.13
單位
Differential -100Pa 100Pa 1.5 % RS-232 Gas 6 mm Tube - - 1280 ms 27 mA 18 V dc - -
RS庫存編號 123-7142
製造零件編號SDP611
BrandSensirion
HK$284.97
單位
Differential -500Pa 500Pa 3 % I2C Air, Nitrogen Gas, Oxygen Gas 5.2 mm Tube - - 4.6 ms <6 mA 3.6 V - PBT
RS庫存編號 173-2218
製造零件編號SDP616
BrandSensirion
HK$358.925
Each (In a Tray of 80)
單位
Differential -500Pa 500Pa 3 % I2C Air, Nitrogen Gas, Oxygen Gas 5.2 mm Tube - - 90 ms <5 mA 3.3 V - PBT
RS庫存編號 774-4094
製造零件編號SDP1000-L025
BrandSensirion
HK$845.73
單位
Differential -62Pa 62Pa 0.6 %, 2 % Analogue Air, Non-Aggressive Gas - 0.2 → 4 V 3 Pin SMD Connector 40 ms 5.2 mA 4.75 → 5.25 V - PPS
RS庫存編號 123-7138
製造零件編號SDP600-500Pa
BrandSensirion
HK$256.49
單位
Differential -500Pa 500Pa 3 % I2C Air, Nitrogen Gas, Oxygen Gas 5.2 mm Tube - - 4.6 ms <6 mA 3.6 V - PBT
RS庫存編號 774-4091
製造零件編號SDP2000-L
BrandSensirion
HK$712.19
單位
Differential -100Pa 3500Pa 0.2 %, 1.5 % Analogue Air, Non-Aggressive Gas - 0.25 → 4 V 3 Pin SMD Connector 40 ms 5.2 mA 4.75 → 5.25 V - PPS
RS庫存編號 174-9069
製造零件編號SDP33-1500Pa-TR-250pcs
BrandSensirion
HK$268.13
單位
Differential -1500Pa 1500Pa 6 % I2C Air, N2, O2 2 mm Tube - - 3 ms 5.5 mA 5.5 V - Epoxy-Based Resin, Glass, LCP
RS庫存編號 173-2221
製造零件編號SDP2000-L
BrandSensirion
HK$636.334
Each (In a Tray of 25)
單位
Differential -100Pa 3500Pa 0.2 %, 1.5 % Analogue Air, Non-Aggressive Gas - 0.25 → 4 V 3 Pin SMD Connector 40 ms 5.2 mA 4.75 → 5.25 V - PPS
RS庫存編號 173-2213
製造零件編號SDP600-500PA
BrandSensirion
HK$218.553
Each (In a Tray of 80)
單位
Differential -500Pa 500Pa 3 % I2C Air, Nitrogen Gas, Oxygen Gas 5.2 mm Tube - - 4.6 ms <6 mA 3.6 V - PBT
RS庫存編號 123-7136
製造零件編號SDP600-025Pa
BrandSensirion
HK$286.64
單位
Differential -25Pa 25Pa 3 % I2C Air, Nitrogen Gas, Oxygen Gas 5.2 mm Tube - - 4.6 ms <6 mA 3.6 V - PBT
RS庫存編號 173-2211
製造零件編號SDP601
BrandSensirion
HK$249.58
Each (In a Tray of 80)
單位
Differential -500Pa 500Pa 3 % I2C Air, Nitrogen Gas, Oxygen Gas 5.2 mm Tube - - 4.6 ms <6 mA 3.6 V - PBT
RS庫存編號 123-7143
製造零件編號SDP616
BrandSensirion
HK$363.55
單位
Differential -500Pa 500Pa 3 % I2C Air, Nitrogen Gas, Oxygen Gas 5.2 mm Tube - - 90 ms <5 mA 3.3 V - PBT
RS庫存編號 123-7134
製造零件編號SDP1108-R
BrandSensirion
HK$801.10
單位
Differential 0Pa 500Pa 2 % Analogue Air, Nitrogen Gas, Oxygen Gas 5.2 mm Tube 0.25 → 4 V - 10.1 ms 6 mA 5.25 V dc - -
RS庫存編號 173-2216
製造零件編號SDP611
BrandSensirion
HK$218.553
Each (In a Tray of 80)
單位
Differential -500Pa 500Pa 3 % I2C Air, Nitrogen Gas, Oxygen Gas 5.2 mm Tube - - 4.6 ms <6 mA 3.6 V - PBT
RS庫存編號 173-2219
製造零件編號SDP1000-L05
BrandSensirion
HK$636.334
Each (In a Tray of 25)
單位
Differential -5Pa 125Pa 0.3 %, 2 % Analogue Air, Non-Aggressive Gas - 0.25 → 4 V 3 Pin SMD Connector 40 ms 5.2 mA 4.75 → 5.25 V - PPS