Product Overview

Measurement of flow velocity, volume flow and temperature
Point and timed mean value calculation
Max./min. values
Hold button for freezing measurement value
Display illumination
Auto-off function
TopSafe, protection of the instrument from dirt and impact
(optional)
Thermal
anemometer
testo 425 – With fixed flow velocity
probe
m/s
°C
testo 425 is a compact anamometer with a fixed thermal
flow velocity probe. The probe head has a diameter of 7.5
mm. With the extendable telescope (length max. 820 mm),
the measuring instrument is suitable for flow velocity
measurement in ducts. The testo 425 also measures
extremely accurately in the low flow velocity range.
The volume flow is directly shown in the display. For the
purposes of volume flow calculation, the duct area can be
easily entered into the testo 425. In addition to this, the
instrument can be switched over to display the current
temperature. Timed and point mean value calculation
provide information on the average volume flow, flow
velocity and temperature measurement value. The Hold
function allows the current measurement value to be frozen
in the display, min./max. values are also displayed at the
press of a button.
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testo-425-P01 02.08.2013 08:42 Seite 1