The HFG21 allows the user to generate a variable dew or frost flow rate for the calibration of the hygrometer. It works by passing dry air through an internal osmotic humidifier to provide an adjustable amount of water vapor. The user can use a front-panel mounted valve to adjust the mixing ratio and output the dew/frost point. The user can use a standard hygrometer, such as the 973 or 373, to measure this dew/frost point.

Very easy to set up

The HFG1 only takes a few minutes to set up:

• Add distilled water to the saturation chamber and connect the reference hygrometer to outlet 1.

• Connect the inlet pressure, set the regulator to the desired working pressure and regulate the flow to the desired value.

• Outlet 2 is connected to the hygrometer to be measured and requires the use of standard tubing and fittings.

• If you need help, Chillmirror can provide the quick couplings and tubing you need to accommodate all types of hygrometers and humidity sensors.