Bourdon tube pressure gauges
A Bourdon tube is a way of measuring pressure. Patented in 1849 by Edward Bourdon, the Bourdon pressure gauge was lauded for its accuracy, sensitivity, and linearity relative to other methods of measuring pressure. Probably every mechanical dial-type pressure gauge you've ever seen is based on a Bourdon tube.
The Bourdon pressure gauge works by measuring the amount of change in a coiled or semicircular metal tube by a pressurized fluid inside. This is due to the principle that a flattened tube tends to regain its circular form when pressurized.
Bourdon tube pressure gauges are used for the measurement of relative pressures from 0.6 ... 7,000 bar. They are classified as mechanical pressure measuring instruments and thus operate without any electrical power.
We deliver Bourdon tube pressure gauges with various common worldwide measuring ranges, process connections, approvals, and nominal sizes.
For critical applications, there are Bourdon tube pressure gauges with liquid filling. Through the case liquid, precise readability is ensured, even with high dynamic pressure loads. It damps the moving parts within the case and thus prevents damage and increased wear.
What is the operating principle behind Bourdon tube pressure gauges?
The operating principle of a Bourdon tube pressure gauge is based on the deformation of a coiled or semicircular metal tube when exposed to pressure. As the internal pressure increases, the flattened tube attempts to return to its circular shape, causing it to straighten out. This movement is transmitted through mechanical linkages to the gauge's dial, providing a direct reading of the pressure. This method is known for its accuracy, sensitivity, and linearity.
What are the safety standards for Bourdon tube pressure gauges used in industrial applications?
Bourdon tube pressure gauges designed for industrial applications, such as the Process industry pressure gauge type MGS30/EXTRA DN125, are built in accordance with safety specifications like ASME B40.1 and UNI-EN 837-2. These standards ensure that the gauges can withstand high pressures and provide reliable performance while minimizing the risk of failure.
How do Bourdon tube pressure gauges compare to electronic pressure sensors?
Bourdon tube pressure gauges offer several advantages over electronic pressure sensors, including mechanical simplicity, no need for power supply, and high durability in harsh environments. However, electronic sensors may provide enhanced accuracy and the ability to integrate with modern automation systems. For example, the Process industry pressure gauge type MGS32 DN125 is designed to meet robust industrial standards while offering precise measurements.