Omega Mesure
testo 425 - Anémomètre numérique à fil chaud avec connexion à l’App

Testo · testo 425

testo 425 - Digital hot wire anemometer with App connection

The compact hot wire anemometer testo 425 with telescopic probe is ideal for simple, fast and precise determination of flow velocity and volume flow in ventilation ducts of air conditioning and ventilation systems. The connection to the testo Smart App enables configuration, display (also as second screen) and storage as well as documentation of the measurement directly in the App.

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Category: Measuring instruments · Anemometers

Specifications by model

Temperature - NTCValue
Measuring span-20 to +70 °C
Accuracy±0.5 °C
Resolution0.1 °C
Velocity – thermal anemometerValue
Measuring span0.01 to 30 m/s
Accuracy±(0.5 m/s + 5.0 % of mv) (20.01 to +30 m/s) · ±(0.03 m/s + 4.0 % of mv) (0.01 to +20 m/s)
Resolution0.01 m/s
General technical dataValue
Weight268 g
Dimensions135 x 60 x 28 mm
Operating temperatureProbe: -20 to +70 °C · -20 to +50 °C
Product / housing materialABS + PC / TPE
Cable length1.5 m
Probe shaft diameter7.5 mm
Ingress protection ratingIP 20
Probe length180 mm
Battery life35 h
Battery type3x AA
Storage temperature-20 to +50 °C

Full description

Optimally adjusted air conditioning and ventilation systems are a decisive factor for modern buildings. Accordingly, it is important to use the appropriate measurement technology to ensure that the flow, temperature and volume flow in the ventilation duct are correct. The testo 425 thermal anemometer is your fast, easy and precise companion. The cable-connected telescopic probe can be extended up to 820 mm, making it easier to work overhead or in large diameter ducts. All relevant calculations, such as volume flow or time and point averages, are performed automatically by the particularly robust and compact measuring instrument. Incidentally: Configuration of the measuring instrument, display and storage of measured values as well as documentation are all particularly convenient with the testo Smart App. This also turns your smartphone into a second display. Key benefits: • Simple, fast and precise flow and temperature measurement plus volume flow calculation in the ventilation duct • More flexibility for duct measurements with the cable-connected telescopic probe (maximum length 820 mm) • Fast in-app (duct) configuration, graph history, second screen and measurement data memory in the testo Smart App • Timed and point mean value calculation testo 425 - Flow velocity measurement in ventilation ducts To the video Scope of delivery: • testo 425 - Thermal hot wire anemometer with App connection and fixed telescope (max. 820 mm) • Transport bag • test protocol • 3 x AA batteries

Compatible accessories (3)

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