Precise and crystal clear...
Extech humidity and temperature USB datalogger with the capability of capturing data records of up to 16,000 readings for each parameter.
CENTER 342 - Temperature Humidity Recorder (Datalogger) with Center 345 Communication Base
CENTER 376 - Precision RTD Thermometer (0.01°C Resolution, Datalogger)
Extech SD700 Barometric Pressure/Humidity/Temperature Datalogger. Records data to SD card in Excel® format