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Humidity & Temperature Datalogger Model RHT20



1 Record LED
2 Alarm LED
3 LCD Display
4 Temperature – Humidity display selection
5 MAX/MIN display selection
6 Battery Compartment (rear)
7 Temperature and Humidity sensors
8 USB PC port (bottom)
Display Description
Full battery symbol.
Weak battery symbol. Replace battery when this
appears. Battery life is more than 3 months.
DATE: Current date is displayed
TIME: Current time is displayed
Time and Date automatically swap every 10 sec.
MAX: Maximum value during a datalogging session is
MIN: Minimum value during a datalogging session is
REC: Recording in progress indicator
FULL: Memory is full indicator
%RH: Humidity value is displayed
°C: Celsius temperature units
°F: Fahrenheit temperature units


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