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.
Featured pressure gauge products
760mmHg absolute range digital vacuum gauge - Digital vacuum gauge for measuring over the 0 to 760mmHg (millimetres of Mercury) absolute pressure range. 
1000 bar, 15000 psi, 100 MPa Pressure Gauges, Meters & Manometers - High range pressure gauges with a measurement range from 0 to 1000 bar or 15,000 psi.
Glossary of 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
