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.
Delivery Scope
testo 425 thermal anemometer with permanently attached flow probe including temperature measurement and telescope (max. 820 mm), calibration protocol and battery.
| Temperature - NTC | |
|---|---|
|
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 | |
|---|---|
|
Measuring range |
0 to +20 m/s |
|
Accuracy |
±(0.03 m/s + 5 % of mv) |
|
Resolution |
0.01 m/s |
| General technical data | |
|---|---|
|
Storage temperature |
-40 to +85 °C |
|
Weight |
285 g |
|
Dimensions |
182 x 64 x 40 mm |
|
Operating temperature |
-20 to +50 °C |
|
Housing |
ABS |
|
Warranty |
2 years |
|
Battery type |
9V block battery, 6F22 |
|
Battery life |
20 h |
