INSTRUCTION MANUAL
Model 407445
Heavy Duty Hygro-Thermometer
99 Washington Street
Melrose, MA 02176
Phone 781-665-1400
Toll Free 1-800-517-8431
Visit us at www.TestEquipmentDepot.com
Back to the Extech 407445 Product Page
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.
Specifications
General Specifications
Display
Dual function LCD display with contrast adjustment
Measurement Relative Humidity (RH) and Temperature (°C & °F)
Data Hold Freezes Display
Sensor types Humidity: Thin film, capacitance sensor
Temperature: Thermistor
Memory Recall Records/Recalls MAX, MIN, and Average readings
Power off Automatic power off after approx 10 minutes of inactivity
Data Output RS 232 PC serial interface
Sampling Time Approximately 0.8 seconds
Operating
Temperature
Operating Humidity < 90% RH
Power Supply 9V battery
Power Consumption Approx. 8.5 mA DC
Weight 0.76 lbs. (345 g) including batteries & probe
Size Instrument: 7.1 x 2.8 x 1.3" (180 x 72 x 32mm)
Range Specifications
RH 10% to 95%
Temperature
RH
32οF to 122οF
(0
Instrument: 32 to 122°F (0 to 50 °C)
Probe: 32 to 140°F (0 to 60°C)
Sensor head: 1” diameter x 6.3” (26mm x 160mm)
Range Resolution Accuracy
ο
C to 50οC)
0.1% RH > 70% RH: ± 4% RH
< 70% RH: ± 3% RH
0.1ο F/C ± 1.5 οF (± 0.8οC)
Test Equipment Depot, 99 Washington Street, Melrose, MA 02176
781.665.1400 | 800.517.8431 | Fax: 781.665.0780
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