Features a memory capacity of 8100 lines of data per channel—can store data for about 506 days with a log interval of 90 minutes. Automatically start logging date and time by setting the preset start. Set upper and lower warning limits—Hi or Lo alarm lights up when temperature or humidity threshold is triggered. USB connection. Operates on two “AAA” batteries.

SPECIFICATIONS
	EF4953A	EF4953B
Temperature
Range:	-45 to 205.0°C	-15 to 65.0°C
Accuracy:	±0.1°C + 1 digit	±0.1°C + 1 digit
Resolution:	0.1°C at -9.9 to 205.0°C	0.1 at -9.9 to 65.0°C
	1°C at -10°C or less	1°C at -10°C or less
Humidity
Range:	--	10 to 99%
Accuracy:	--	±0.1% at 15.0 to 99.9%
		1% at less than 15.0%
Resolution:	--	0.1% at + 1 digit
Sample Points:	8,100 lines/channel	8,100 lines/channel
Sample Rate:	1,2,5,10,15,30 sec; 1,2,5,10,15,30,60,90 min	1,2,5,10,15,30 sec; 1,2,5,10,15,30,60,90 min
Dimensions:	3 15⁄16W x 2 7⁄8H x 7⁄8D"	3 15⁄16W x 2 7⁄8H x 7⁄8D"