We have 1 in stock.
Plug-in Humidity-probe head for wireless handles. Measures temperature and relative humidity, Used by several meters for dry bulb, wet bulb and dew-point calculations. Sensor is conservatively rated at 2% absolute accuracy. Utilizes Testos' patented humidity sensor accurate from 0 to 100%RH. Long term stability guarantees years of precision measurement.
Look for special combo kits with everything you need.