The LV200 air supply unit is used for continuously supplying all common oxygen probes with reference air.

A defined volume of filtered external air is pressed into the inside of the zirconium oxide pipe. The low gauge pressure largely prevents any penetration of the furnace atmosphere into the zirconium oxide pipe.

The volume of reference air selected should not be too great otherwise there will be an unnecessary cooling of the built-in thermoelement. As a rule, oxygen probes with through zirconium oxide pipes ( MESA oxygen probes) require almost no reference air so that the temperature measurement error is negligible in these probes.

In addition to the reference air the LV200 also offers an air output for the probe rinsing. This externally triggerable air output is used for rinsing out the space between the protective pipe and the zirconium oxide pipe.