Fluke 971 Temperature Humidity Meter

Works well. The accuracy is within about 2% RH when compared to atmospheres with known RH. The instrument is very sensitive and rapidly changes even if you breath too near the sensor. The instrument seems to have been changed from the original 971. There is no sensor shutter on the newer 971. In some ways this change is better since forgetting to open the shutter will still give you a reading but there is not much chance this reading will be right. I keep my 971 rolled up in a small plastic bag to help protect the sensor. The instrument comes with batteries installed. The batteries seem to be of good quality. All-in-all, this instrument more than reliable enough for HVAC work.