A&N currently offers two styles of vacuum gauges for rough vacuum applications:

Bourdon gauges

Thermocouple gauge tubes


A&N Bourdon gauges provide '30 to 30' (30” Hg vacuum to 30 psig) range of vacuum measurement and are available in multiple flange styles. Vacuum measurement is accomplished by a mechanical process in which a copper tube changes position due to the force of atmospheric pressure acting upon it. The mechanical force moves the indicator needle and provides a visual reading of the presence of vacuum in the system. Because this is a mechanically induced reading, Bourdon gauges work reliably regardless of the type of gas present.

A&N thermocouple gauge tubes are dependable, low-cost replacement tubes for a variety of manufacturers. A cross-reference chart as well as a full explanation of their operation is available in the A&N print catalog or in the PDF version of the print catalog (see above). Thermocouple tubes are often used to monitor foreline pressure and to signal that the system has reached cross-over pressure.