Why is sensor regeneration necessary?
As the sensor is exposed to mercury vapor, some of it adsorbs onto the sensor in a process similar to condensation of water vapor on a cold surface. Each time the sensor “sees” mercury, the adsorbed load increases a little, and the sensitivity of the sensor decreases a little. At some point it is necessary to remove all the adsorbed mercury to restore full sensitivity. This is done by heating the sensor to a carefully controlled temperature which boils off the adsorbed mercury. The instrument will prompt the operator as regeneration is needed.
