The Baker Hughes Panametrics MG101 Hygrometer Calibration System from HMA INSTRUMENTATION is used to generate precise, repeatable levels of water vapour in a carrier gas stream. This primary dew/frost point generation system achieves an accuracy of ±1°C within a continuously adjustable range. The MG101 employs the elementary principle of gas dilution. Dry gas is piped into the system, where it is divided into two streams. One stream is saturated with water vapour at a known temperature, while the other stream remains dry. The two streams are then mixed. The saturated stream is diluted with varying amounts of the dry gas to produce the desired gas/water vapor mixture.

The Baker Hughes Panametrics MG101 Hygrometer Calibration System from HMA INSTRUMENTATION employs either single stage or two stage dilution to generate gas with a dew/frost point range of –75°C to 10°C at 20°C ambient temperature. The MG101 can be used to verify a wide variety of instruments, including Panametrics Sensing aluminium oxide moisture probes. When used with a chilled mirror reference, the system provides an economical calibration system.