Page 1 Model 407445 Version 2.2 February 2004
INSTRUCTION MANUAL
Model 407445
Heavy Duty Hygro-Thermometer
Introduction
Congratulations on your purchase of Extech’s Heavy Duty Hygro-Thermometer. The Model
407445 displays Temperature & Relative Humidity simultaneously and includes a built-in
PC interface. This professional meter, with proper care, will provide years of safe reliable
service.
