Temperature and Humidity Data Logger “CEM” Model DT-172 You can monitor temperature and humidity values efficiently and conveniently for long time periods by using the datalogger. The readings are saved in the logger and simply read out by your PC with USB interface. The LCD can show current readings, Max, Min and sign of alarm. Features: Memory for 16000 readings Freely selectable measurement cycle from 1sec. to 24h Battery life of more than 3 years Display LCD Download collected data through PC's USB interface Alarm display if user-defined maximum/minimum values are exceeded Analysis software used to view graph for logging data Specifications: Measuring range: 0 to 100%RH, -40 to 70°C (Temp) Accuracy: ±2%RH, ±0.5°C (Temp) Resolution: 0.1%RH, 0.1°C  (Temp) Memory: 32,000 samples (16,000 for temperature and remainings for humidity) Measuring rate: 1sec. to 24h Battery life: typically 3 years Analysis software: windows 98/2000/XP/VISTA PC: Software, USB Power supply: Lithium battery. 3.6V Size(HxWxD): 94x50x32mm Weight: 29g Accessories:     Manual   2 x Screws   Battery   Holster   USB Lead & Windows Software      Padlock