Bourdon Tube Pressure Gauges

It works on a simple mechanical principle. Fluid enters a flexible, sealed tube (the Bourdon tube), causing it to straighten from its original curved shape. This movement is transferred via a system of gears and levers to a pointer on a dial. The higher the pressure, the more the tube straightens and the further the pointer moves.

A Bourdon gauge typically measures gauge pressure—the pressure relative to the surrounding atmosphere. They can be designed to measure a wide range of pressures, from vacuums to the very high pressures found in industrial applications like oil and gas pipelines, hydraulic systems, and processing facilities.

The main types are defined by the tube's shape: C-type, spiral, and helical. C-type is the most common for general-purpose use. Spiral and helical types are used for applications requiring higher sensitivity and accuracy, or for measuring low pressures. The choice depends on the required pressure range, accuracy, and space constraints.

Yes, our industrial pressure gauges are engineered for demanding environments like those in the oil and gas industry. They feature heavy-duty construction, such as a one-piece case-to-socket connection, to ensure durability and reliable performance under vibration, pulsation, and corrosive conditions. Protective accessories are also available.

To enhance performance and extend service life, we offer several accessories. Diaphragm seals protect the instrument from corrosive or viscous media. Needle valves allow for throttling and isolation, while pressure snubbers dampen pulsations. These accessories ensure the gauge operates accurately within your specific process conditions.

Bourdon tubes are made from various materials depending on the application and process media. Common materials include bronze, brass, stainless steel, and Monel. Stainless steel is often used for its corrosion resistance in chemical and processing industries, while Monel is ideal for highly corrosive environments.