AZ87798 Desktop Dew Point Humidity Temperature Tester,87798 Dew Point SD Card Logger 

* Simultaneously displays temperature and humidity

* Advanced SD card logging design for continuous recording

* Easy-to-read super big LCD display

* Check dangerous heat conditions through WBGT indext

* Programmable danger zone for warning purpose

* Designed with capacitance type humidity sensor to get accurate and quick reading

* Temperature unit C/ F switchable

* Max/min function to review data

* Battery low indicator

* Real time display (hour & minute, am/pm)

* Desktop and wall mount for long time monitoring

* Audible beeper and bright red LED for danger zone warning

*Long battery life (via alkaline battery)

-no logging: one year

-logging: one month (sampling rate:1min, 1G SD card)