Extech RH390 Precision Psychrometer (Temp, RH, Dew Point, Wet Bulb - Deg C & F)

Extech RH390 Precision Psychrometer Humidity Temperature Meter

RH390 Precision Psychrometer Humidity, Temperature, Dew Point.

Extech RH390 Precision Hygro Thermometer Psychrometer Turns On

Extech RH390 Precision Hygro Thermometer Psychrometer Turns ON

Extech RH390 Precision Hygro Thermometer Psychrometer PARTS ONLY