This standalone data logger measures and stores up to 16,382 relative humidity and 16,382 temperature readings over 0 to 100%RH and -35 to +80°C (-31 to +176°F) measurement ranges. The user can easily set up the logger and view downloaded data by plugging the module into a PC's USB port and using the supplied software. Relative humidity, temperature and dew point (The temperature at which water vapour present in the air begins to condense) data can then be graphed, printed and exported to other applications.

Specification		Min.	Typ.	Max.	Unit
Relative Humidity	Measurement range	0		100	%RH
	Repeatability (short term)		±0.1
	Accuracy (overall error) (20-80%RH)		±2.0*	±4.0
	Internal resolution		0.5
	Long term stability		0.5
Temperature	Measurement range	-35 (-31)		+80 (+176)	°C (°F)
	Repeatability		±0.1 (±0.2)
	Accuracy (overall error) (20-80%RH)		±0.3 (±0.6)	±1.5 (±3)
	Internal resolution		0.5 (1)
Dew Point	Accuracy (overall error) (25°C, 40-100%RH)		±1.1 (±2) **		°C (°F)
Logging rate		every 10s		every 12hr	-
Operating temperature range		-35 (-31)		+80 (+176)	°C (°F)
1/2AA 3.6V Lithium Battery Life ***			1* year

* This specifies the overall error in the logged readings, for relative humidity measurements between 20 and 80%RH
** This specifies the overall error in the calculated dew point, for realtive humidity measurements between 40 and 100%RH at 25°C
*** Depending on sample rate, ambient temperatures and use of alarm LEDs