Bourdon tube pressure gauge ? operating principle

Bourdon tube pressure gauges are the most regularly used mechanical pressure measuring instruments. Their pressure element is frequently known as a Bourdon tube: The French engineer Eug�ne Bourdon used this functional principle in the middle of the 19th century. It is predicated on an elastic spring, a c-shaped, bent tube having an oval cross-section.
The result of pressure on a Bourdon tube
When the internal space of the Bourdon tube is pressurised, the cross-section is thus altered towards a circular shape. pressure gauge octa that are created in this process increase the radius of the c-shaped tube. As a result, the finish of the tube moves by around two or three millimetres. This deflection is really a way of measuring the pressure. It really is used in a movement, which turns the linear deflection right into a rotary movement and, via a pointer, makes this visible on a scale.
Bourdon tube variants
With the c-shaped bent Bourdon tubes, pressures around 60 bar can be displayed. For ไดอะแฟรม ซีล , helical or spiral-type Bourdon tubes are used. With regards to the geometry, material and material thickness, pressures around 7,000 bar could be realised. Depending on pressure gauge octa , the pressure elements are created from copper alloys, stainless steels or special materials such as Monel.
Note
More info on Bourdon tube pressure gauges are available on the WIKA website.