In order to establish whether an air conditioning or ventilation system is functioning properly, among other things you need to check the flow speed or the volumetric flow in the ventilation duct. If the air flow velocity is too low, the room loads are not correctly discharged and optimum room air quality can no longer be guaranteed.
testo 425 thermal anemometer for quick, easy flow measurement
The testo 425 thermal anemometer enables quick spot measurements in ventilation ducts. It records the flow speed, calculates the volumetric flow and also measures the temperature. With a measuring range of 0 to +20 m/s, the anemometer is particularly well suited to low air flow velocity.
Temperature - NTC | |
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Measuring range |
-20 to +70 °C |
Accuracy |
±0.5 °C (0 to +60 °C) ±0.7 °C (Remaining Range) |
Resolution |
0.1 °C |
Velocity -Thermal anemometer | |
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Measuring range |
0 to +20 m/s |
Accuracy |
±(0.03 m/s + 5 % of mv) |
Resolution |
0.01 m/s |
General technical data | |
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Dimensions |
182 x 64 x 40 mm |
Operating temperature |
-20 to +50 °C |
Housing |
ABS |
Battery type |
9V block battery, 6F22 |
Battery life |
20 h |
Storage temperature |
-40 to +70 °C |
Weight |
285g |