Instrument Introduction:
Testo 425 precision anemometerFixed connection thermal wind speed probe with telescopic handle. The testo 425 can directly display the air volume value. As long as the cross-sectional area of the pipeline is input, the instrument can accurately calculate the air volume. In addition, it can be freely switched to the current temperature reading. The instrument has a time period/multi-point average calculation function, which can calculate the average values of air volume, wind speed, and temperature. At the same time, it can display the maximum and minimum values, and use the hold button to maintain the current reading.

Testo 425 precision anemometerTechnical parameters:
Storage temperature -40~+85 ℃
Operating temperature -20~+50 ℃
Battery type 9V block battery, 6F22
Battery life of 20 hours
Weight 285 g
Size 182 x 64 x 40 mm
Shell ABS
Battery type NTC
Range -20 to+70 ℃
Accuracy ± 0.5 ℃ (0~+60 ℃)
± 0.7 ℃ (measured value)
Resolution 0.1 ℃
Battery type thermal wind speed probe
Range 0~+20 m/s
Accuracy ± (0.03 m/s+5% measurement value)
Resolution 0.01 m/s

Testo 425 precision anemometerMain features:
1) Measure temperature, wind speed, and air volume;
2) Calculate the average of multiple points/time periods;
3) Display the maximum value/minimum value of zui;
4) Hold key, used to maintain reading;
5) Display screen with backlight;
6) Automatic shutdown function;
7) Protective soft cover, dustproof and anti-collision (optional).