User Manual
Hygro-Thermometer Pen
Model 445580
Introduction
Congratulations on your purchase of the Extech Hygro-Thermometer Pen Model 445580. The
445580 can measure Relative Humidity from 10% to 90% and Temperature from 14 to 122
o
F (0 to
50
o
C). Advanced features include MIN/MAX Memory, Push-button Calibration, Display Hold, and
Automatic Power Off.
Meter Description
1. Humidity/Temperature Sensor
2. POWER ON/OFF button
3. Data HOLD button
4. MIN/MAX Memory button
5. Calibration and units select button
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