Lascar EL-USB-2-LCD USB Datalogger

This standalone data logger measures over 16,000 readings over a -35 to +80°C (-31 to +176°­­F) and 0 to 100% humidity (RH) range. At the touch of a button, use the on-board display to cycle between the current, minimum and maximum temperature logs seen during the session for both temperature and humidity. Easily set up the logger and view downloaded data by plugging the unit into a PC’s USB port and using the free EasyLog software provided. Data can then be graphed, printed and exported to other applications for detailed analysis. Supplied with ½ AA battery and wall mount clip.  
 
Temperature:
Measurement range: -35°C to 80°C (-31°F to 176°F)
Internal resolution: 0.5°C (1°F)
Accuracy (overall error): 0.55°C (1.04°F) typical (5 to 60°C)
Long term stability: <0.02°C (0.04°F) / year
Relative Humidity:
Measurement range: 0 to 100%RH
Internal resolution: 0.5%RH
Accuracy (overall error): 2.25%RH typical (20 to 80%RH)
Long term stability: <0.25%RH / year
Logging Rate: User selectable between 10 seconds and 12 hours
Battery Life: 2 Years