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Bourdon Tube

Bourdon Tube is a flattened length of thin hollow metal tubing which is formed into a C shape.

If the tube is closed at one end and pressurised at the other end, the flattened tube will become more circular which will cause the tube to straighten by an amount which is proportional to the applied pressure.

If a rotating needle is attached to the closed end via some gears and linking mechanisms, it is possible to transform the displacement of the Bourdon tube into a needle rotation.

If a dial is added behind the needle with calibrated pressure reading markings, it can be used as a pressure gauge.

Pressure gauge products
  • LEO3 Current or Digital Output Pressure Gauge
  • DM01 Multi-Range High Accuracy Pressure Gauge
  • 20 bar digital pressure gauge with USB connection and PC logging
  • 300 mbar vacuum and pressure high accuracy gauge

Request info on pressure gauge products for your application.

Sensor Technology Related Terms

More pages related to sensor technology technical terms.

  • BFSG – Bonded Foil Strain Gauge
  • Capacitive Fluid Level Measurement
  • Ceramic Pressure Sensors
  • Conductive Fluid Level Detection
  • Doppler Effect Flow Measurement
  • Float Fluid Level Detection
  • LVDT – Linear Variable Differential Transformer
  • Paddle Wheel Sensor
  • Piezoresistive Strain Gauges
  • Positive Displacement Flow Measurement
  • Radar Distance Sensing
  • SOI – Silicon on Insulator
  • Strain Gauge
  • Thin Film
  • Transit Time Flow Measurement
  • Turbine Rotor Sensor
  • Ultrasonic Distance Sensing
  • Ultrasonic Flow Velocity Sensors
  • Vibrating Tuning Fork Fluid Level Detection
  • Vortex Flow Measurement
  • Wheatstone Bridge Strain Gauge

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Digital Pressure Gauge Specifier

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Select your digital pressure gauge requirements

Product Selection Guides

  • Voltage Output Pressure Transducers
  • Pressure Transmitters
  • Pressure Transducers
  • Millivolt Output Pressure Transducers
  • Hydrostatic Liquid Level Sensors
  • Digital Readouts
  • Digital Pressure Sensors
  • Digital Pressure Gauges
  • Differential Pressure Sensors
  • Data Loggers

Application Selection Guides

  • Vacuum
  • Submersible
  • Oxygen Service
  • Dual Temperature and Pressure
  • Digital Interface
  • Differential Pressure
  • Air Pressure
  • Absolute Pressure

Help Guides

  • Why use 4-20mA and 3-15 psi rather than 0-20mA & 0-15psi
  • Using Hydrostatic Pressure Transducers for Measuring Fluid Level
  • Pressure Sensor Accuracy Specifications
  • Measuring vacuum with negative gauge or absolute ranges
  • Measuring the volume of liquid in a horizontal cylinder tank
  • Measuring the difference in air pressure between rooms
  • Measurement Accuracy
  • How to get a 10 volt signal from a 4-20mA output pressure sensor
  • How to determine milk tank level and volume from pressure
  • How to Connect a 4-20mA Current Loop Pressure Transmitter
  • Determining water tank volume using hydrostatic pressure
  • Are all IP68 Water Resistant Protection Ratings the same

Product Enquiry

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