User's Guide
Hygro-Thermometer
Model 45320
Introduction
Congratulations on your purchase of the Extech 45320 Hygro-Thermometer. The backlit
LCD displays temperature (in
o
C or
o
F) and relative humidity (%) simultaneously.
Maximum and minimum temperature and relative humidity readings can be stored and
recalled. Careful use of this meter will provide years of reliable service.
Specifications
Display
Backlit E.L. (Electro-Luminance) LCD
Measurement ranges
Temperature: 5.0
o
F to 122.0
o
F (-15.0
o
C to 49.9
o
C)
Relative Humidity: 25% to 95%
Accuracy Temperature:
±1.8
o
F (1
o
C)
Relative
Humidity:
±5%
Sensor types
Temperature: Thermistor
Relative
Humidity:
Resistive
Max/Min mode
Record/Recall highest and lowest temperature & relative
humidity readings
Over range indication
Dashes ‘------‘ will appear on the LCD for temperature or
relative humidity if a measurement is out of range
Low battery indication
Displayed battery symbol superimposed with an ‘X’
Power supply
Two (2) ‘AA’ 1.5V Batteries
Battery life
1 year (typical)
Dimensions
Meter: 5.25 x 2.75 x 1.00" (133 x 70 x 25mm)
Probe: 7” (178mm) length; 1” (25mm) width
Sensor cable length
39” (1m)
Weight
6.7 oz. (190g) with battery
