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 Stock No. 719-1065
Mfr. Part No.MPX4250A
BrandNXP
MYR78.32
Each
units
Absolute 20kPa 250kPa ±1.5 % Analogue Air - 4.9 V PCB Mount - 1 ms - 4.85 5.35 V dc -
RS Stock No. 169-0629
Mfr. Part No.MPX4250A
BrandNXP
MYR69.04
Each (In a Tray of 25)
units
Absolute 20kPa 250kPa ±1.5 % Analogue Air - 4.9 V PCB Mount - 1 ms - 4.85 → 5.35 V dc -
RS Stock No. 922-7377
Mfr. Part No.MPXA6115AC6U
BrandNXP
MYR64.171
Each (In a Tube of 40)
units
Absolute 15kPa 115kPa ±1.5 % Analogue Air - 4.8 V PCB Mount - 1 ms - 4.75 5.25 V dc -
RS Stock No. 922-7327
Mfr. Part No.MPX4250AP
BrandNXP
MYR65.52
Each (In a Tray of 20)
units
Absolute 20kPa 250kPa ±1.5 % Analogue Air - 4.9 V PCB Mount - 1 ms - 4.85 5.35 V dc -
RS Stock No. 922-7302
Mfr. Part No.MPX2010GP
BrandNXP
MYR51.90
Each (In a Tray of 20)
units
Gauge 0kPa 10kPa ±1 % - Air - 24 26 mV PCB Mount - 1 ms - 10 V dc -
RS Stock No. 922-7368
Mfr. Part No.MPXA4250AC6U
BrandNXP
MYR65.48
Each (In a Tube of 40)
units
Absolute 20kPa 250kPa ±1.5 % Analogue Air - 4.9 V PCB Mount - 1 ms - 4.85 5.35 V dc -
RS Stock No. 719-1030
Mfr. Part No.MPX2010GP
BrandNXP
MYR62.33
Each
units
- - - - - - - - - - - - - -
RS Stock No. 719-1080
Mfr. Part No.MPX5010DP
BrandNXP
MYR65.49
Each
units
- - - - - - - - - - - - - -
RS Stock No. 922-7324
Mfr. Part No.MPX5010DP
BrandNXP
MYR54.56
Each (In a Tray of 20)
units
Differential 0kPa 10kPa ±5 % Analogue Air, Fluid - 4.7 V PCB Mount - 1 ms - 4.75 5.25 V dc -
RS Stock No. 922-7380
Mfr. Part No.MPXM2202AS
BrandNXP
MYR30.223
Each (In a Tube of 60)
units
Absolute 0kPa 200kPa ±1 % - Air - 38.5 41.5 mV PCB Mount - 1 ms - 10 V dc -
RS Stock No. 922-7355
Mfr. Part No.MPX5700AP
BrandNXP
MYR68.43
Each (In a Tray of 20)
units
Absolute 15kPa 700kPa ±2.5 % Analogue Air - 4.7 V PCB Mount - 1 ms - 4.75 5.25 V dc -
RS Stock No. 922-7308
Mfr. Part No.MPX2010DP
BrandNXP
MYR42.58
Each (In a Tube of 20)
units
Differential 0kPa 10kPa ±1 % - Air - 24 26 mV PCB Mount - 1 ms - 10 V dc -
RS Stock No. 922-7403
Mfr. Part No.MPXV5050GP
BrandNXP
MYR60.228
Each (In a Tray of 25)
units
Gauge 0kPa 50kPa ±2.5 % Analogue Air - 4.7 V PCB Mount - 1 ms - 4.75 5.25 V dc -
RS Stock No. 922-7318
Mfr. Part No.MPX2200AP
BrandNXP
MYR51.90
Each (In a Tray of 20)
units
Absolute 0kPa 200kPa ±1 % - Air - 38.5 41.5 mV PCB Mount - 1 ms - 10 V dc -
RS Stock No. 922-7305
Mfr. Part No.MPVZ4006GW7U
BrandNXP
MYR42.29
Each (In a Tray of 40)
units
Gauge 0kPa 6kPa ±2.46 % Analogue Air - 4.6 V PCB Mount - - - 4.75 5.25 V dc -
RS Stock No. 922-7409
Mfr. Part No.MPXV5010DP
BrandNXP
MYR60.228
Each (In a Tray of 25)
units
Differential 0kPa 10kPa ±5 % Analogue Air, Fluid - 4.7 V PCB Mount - 1 ms - 4.75 5.25 V dc -
RS Stock No. 719-1043
Mfr. Part No.MPX2202A
BrandNXP
MYR61.49
Each
units
Absolute 0kPa 200kPa ±1 % - Air - 38.5 41.5 mV PCB Mount - 1 ms - 10 V dc -
RS Stock No. 752-2377
Mfr. Part No.MPXV2202DPT1
BrandNXP
MYR56.69
Each
units
Absolute, Differential, Gauge 0kPa 200kPa ±1 % Voltage Air - 38.5 41.5 mV PCB Mount - 1 ms 6 mA 16 V dc -
RS Stock No. 169-0724
Mfr. Part No.MPXV2202DPT1
BrandNXP
MYR56.388
Each (On a Reel of 100)
units
Absolute, Differential, Gauge 0kPa 200kPa ±1 % Voltage Air - 38.5 → 41.5 mV PCB Mount - 1 ms 6 mA 16 V dc -
RS Stock No. 922-7333
Mfr. Part No.MPX5010GP
BrandNXP
MYR68.43
Each (In a Tray of 20)
units
Gauge 0kPa 10kPa ±5 % Analogue Air, Fluid - 4.7 V PCB Mount - 1 ms - 4.75 5.25 V dc -