Technical vacuum used in industrial applications as well as in research and development covers a wide range of pressures. The span from ambiant conditions down to ultra high vacuum comprises more than 13 decades of pressure, thus a ratio of
1:10 000 000 000 000. Neither a single vacuum pump nor a single vacuum gauge can cover such a large range. adixen therefore offers a broad spectrum of vacuum gauges to select the best solution for each application.

Within the first decades below atmosphere, pressure can be measured easily according to its definition: by the force exerted on a known surface. adixen offers the mechanical gauges to access this range, their reading is independant of the type of gas inside the vacuum system.

For lower pressures forces become too small to be measured at a reasonable price. Gas properties such as thermal conductivity and ionization can serve for indirect pressure measurement. Digital electronics facilitate the indirect method and the adixen range of active gauges offer easy to use vacuum measurement from atmospheric pressure down to ultra high vaccum.

Active Pressure Gauges : Series 2000.
Active gauges are a combination of one or more sensor head(s) with miniature on-board electronics. This simplifies the application of these gauges as the user only needs to provide a supply voltage to run the gauge which gives the pressure signal as a voltage or serial link output. These gauges are well suited for PC or PLC controlled vacuum systems without the need for a dedicated gauge controller.
The SERIES 2000 comprises the classical thermal (Pirani principle) and ionisation gauges (both cold and hot cathode), an innovative quartz crystal gauge as well as a range of capacitance diaphragm gauges. These instruments provide pressure measurement from atmospheric pressure down to ultra high vacuum.
Two gauge controllers complement this product family providing a digital readout of the pressure or - with a cutting edge graphical colour display - pressure over time charts or pseudo analog pressure indication.

Mechanical Pressure Gauges : Bourdon Manometer
Mechanical pressure gauges are absolute pressure gauges which measure the pressure directly by the force exerted on a known surface. In the Bourdon manometer, the pressure acts on the inner surface of a circular or spiral tube. The geometrie of the tube provides different surface size for expanding and contracting forces which leads to a deformation of the tube with pressure variations. Transmission mechanics transform the deformation of the tube into a needle deflection indicating the pressure.
The Bourdon gauges are easy to install and to operate, robust and reliable for long, trouble free operation in gross vacuum processes.