Country of Origin: Germany
Temperature Measurement (NTC Sensor) Measuring Range -4° to 158°F
-20 to +70°C
Accuracy ±1.3°F (remaining range)
±0.9°F (32° to 140°F)
±0.7°C (remaining range)
±0.5°C (0 to +60°C)
Resolution 0.1°F
0.1°C
Air Velocity Measurement (Thermal Anemometer) Measuring Range 0 to 3937 fpm
0 to 20 m/s
Accuracy ±(5.91 fpm + 5% of measured value)
±(0.03 m/s + 5% of measured value)
Resolution 1.97 fpm
0.01 m/s
Environmental Conditions Operating Temperature -4° to 122°F
-20 to +50°C
Storage Temperature -40° to 158°F
-40 to +70°C
Power Supply Battery Type: 9V block battery (6F22)
This Testo 425 digital hot wire anemometer measures air velocity and temperature. It has a built-in hot-wire sensor and a backlit LCD display. It can measure velocities from 0.01 to 30 millimeters per second and temperatures from -20 to 50 degrees ...