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 Stock No. 772-9907
Mfr. Part No.XMPA12B2131
$76.49
Each
units
- - - - - - - - - - - - - -
RS Stock No. 111-5920
Mfr. Part No.PX3AN2BS100PAAAX
BrandHoneywell
$73.87
Each
units
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 - Brass
RS Stock No. 361-3429
Mfr. Part No.XMLA300D2S12
$419.94
Each
units
Differential 20bar 300bar 2 % Relay Hydraulic Fluid G1/4 - M20 Cable Gland - 3 A ac, 100 mA dc 120 → 240 V ac, 250 V dc - Zinc Alloy
RS Stock No. 609-6934
Mfr. Part No.XMLA035A2S11
$294.37
Each
units
Differential 1.5bar 35bar 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 Stock No. 719-1080
Mfr. Part No.MPX5010DP
BrandNXP
$23.24
Each
units
- - - - - - - - - - - - - -
RS Stock No. 922-7324
Mfr. Part No.MPX5010DP
BrandNXP
$18.26
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 - Epoxy
RS Stock No. 455-4624
Mfr. Part No.3100B0010G01B000
$305.96
Each
units
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 Stock No. 324-0986
Mfr. Part No.XMLA300D2S11
$342.49
Each
units
Differential 20bar 300bar 2 % Relay Hydraulic Fluid G1/4 - PG13.5 Cable Gland - 3 A ac, 100 mA dc 120 → 240 V ac, 250 V dc - Zinc Alloy
RS Stock No. 235-5778
Mfr. Part No.24PCEFA6D
BrandHoneywell
$47.13
Each
units
Differential 0psi 0.5psi 0.2 % Unamplified Nitrogen Gas, Oxygen, Water - 25 → 45 mV Solder Tag 1 ms - 10 V dc - -
RS Stock No. 111-5919
Mfr. Part No.PX3AN2BS250PAAAX
BrandHoneywell
$78.21
Each
units
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 - Brass
RS Stock No. 788-4925
Mfr. Part No.2SMPP-03
BrandOmron
$7.905
Each (In a Pack of 2)
units
Gauge -50kPa 50kPa - Amplified Air - - PCB - 200 μA - - PPS
RS Stock No. 177-4881
Mfr. Part No.2SMPP-03
BrandOmron
$6.11
Each (In a Tube of 112)
units
- - - - - - - - - - - - - -
RS Stock No. 398-7045
Mfr. Part No.0166407031027
BrandSuco
$66.32
Each
units
- 1bar 10bar - Relay Air, Heating Oil, Hydraulic Fluid, Turpentine G1/4 - Spade Terminal - - 42 V - Zinc Plated Steel
RS Stock No. 655-8173
Mfr. Part No.26PCCF A2G
BrandHoneywell
$35.73
Each
units
Gauge 0psi 15psi ±0.5 % Wheatstone Bridge Nitrogen Gas, Oxygen, Water - 100 mV dc PCB 1 ms - 10 V dc - -
RS Stock No. 169-7679
Mfr. Part No.26PCCFA2G
BrandHoneywell
$53.244
Each (In a Box of 25)
units
Gauge 0psi 15psi ±0.25 % Wheatstone Bridge Nitrogen Gas, Oxygen - 0 → 100 mV PCB 1 ms - 2.5 → 16 V dc - -
RS Stock No. 739-6777
Mfr. Part No.PBT-RB010SG1SSNAMA0Z
BrandSick
$168.30
Each
units
Gauge 0bar 10bar ±0.5 % Analogue Fluid, Gas G1/4 4 → 20 mA M12 Connector 4 ms 25 mA 8 → 30 V dc - Stainless Steel
RS Stock No. 795-4702
Mfr. Part No.3100B0009V01B000
$273.19
Each
units
Gauge -1bar 9bar ±0.25 % Current Fluid, Gas G1/4 4 → 20 mA DIN 43650 Type A 1 ms 20 mA 8 → 30 V dc - Stainless Steel
RS Stock No. 788-4921
Mfr. Part No.2SMPP-02
BrandOmron
$5.495
Each (In a Pack of 2)
units
Gauge 0kPa 37kPa - Amplified Air - - PCB - 130 μA - - PPS
RS Stock No. 177-4880
Mfr. Part No.2SMPP-02
BrandOmron
$4.60
Each (In a Tube of 112)
units
- - - - - - - - - - - - - -
RS Stock No. 746-3470
Mfr. Part No.X5072-TB-A1-CA-H1-PA 10.0 bar G
BrandDruck
$417.69
Each
units
Gauge - 10bar ±0.2 % Analogue Fluid G1/4 4 → 20 mA DIN 43650 Type A 10 ms 20 mA 7 → 28 V - Stainless Steel
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