Technical parameters:
1、Temperature measuring rang: -40.0℃~ 70.0℃
Accuracy of temperature measuring at normal temp.: ±0.5℃(-20℃~20℃) ±1℃（other ranges）
Status indictor light indicates every working status
Resolution: 0.1℃
Sensor: NTC
Fixed ways of sensor: the Internal or the External
2、Recording cycle: 2s~24h continuous set or 1 week ~ 6 months distributed automatically
Real-time transfers: the Interval time (10s~ 24h) can be adjusted.
3、Recording capacity: 4000poits (DL-20), 8000 points (DL-21)
4、The environment suitable for Data Logger shell: Temperature: -30℃~50℃ Humidity:15%~85%
5、Power supply: 2.4AH 3.6V one non-chargeable battery
6、Data output: Connect the computer with the USB interface to transfer data
7、Safe level: IP65
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