The hot wire probe is equipped with a telescope, which can be extended to a maximum length of 820 mm. The small probe head diameter of 7.5 mm makes the probe ideal for use in ventilation ducts with small holes.
To determine the volume flow of the exhaust air at plate outlets and ventilation grilles, the probe and measuring instrument should be combined with the testovent 410 or testovent 415 volume flow funnel (both optionally available).
One particularly practical feature is the fact that the probe can be changed while the measuring instrument is switched on.