Description
testo 425 – Thermal Anemometer
Optimally adjusted air conditioning and ventilation systems are a crucial factor for modern buildings. Therefore, it is important to use the appropriate measuring technology to ensure correct flow velocity, temperature, and volumetric flow in ventilation ducts. The testo 425 thermal anemometer helps you measure quickly, easily, and precisely. The wired telescopic probe extends up to 820 mm, making it easier to work overhead or in large-diameter air ducts. The particularly robust and compact measuring device automatically performs all necessary calculations, such as volumetric flow or time- and point-based averages. By the way, you can configure the instrument, display and save measurement values, and conveniently document them using the testo Smart App. It also turns your smartphone into a second display.
Order number: 0563 0425
Technical Data
Temperature
| Measuring range | -20 to +70 °C |
| Accuracy | ±0.5 °C |
| Resolution | 0.1 °C |
Thermal anemometer (flow velocity)
| Measuring range | 0.01 to 30 m/s |
| Accuracy | ±(0.03 m/s + 4.0% of measured value) (0.01 to +20 m/s) ±(0.5 m/s + 5.0% of measured value) (20.01 to +30 m/s) |
| Resolution | 0.01 m/s |
General technical data
| Weight | 268 g |
| Dimensions | 135 x 60 x 28 mm |
| Operating temperature | -20 to +50 °C Sensor: -20 to +70 °C |
| Material (housing) | ABS + PC / TPE |
| Cable length | 1.5 m |
| Probe/sensor tube diameter | 7.5 mm |
| Protection class | IP40 / IP20 |
| Probe/sensor length | 180 mm |
| Battery life | 35 hours |
| Battery type | 3 x AAA |
| Storage temperature | -20 to +50 °C |
