Precision instrument, perfect for professionals monitoring and controlling ambient air conditions in a HVAC environment. Humidity + Temperature + Dew point are combined into one meter. 0.01 %RH humidity resolution. 0.01 degree temperature resolution. Dew point measurement. Manual and auto data logger. Data logger function with flexible Selectable Sampling Time Can save 1000 data points with recall Humidity/ Temperature DLSFT: Optional software kit w/ case