The Testo 0554 4173 Flow Straightener Set offers a solution which enables you to take simple, precise measurements at swirl outlets. In conjunction with a funnel, the patented volume flow straightener testovent 417 offers you ideal assistance in measuring the volume flow at swirl outlets. The volume flow straightener makes it possible to change the turbulent flow to an almost uniform flow, which can then be reliably recorded using an optional vane anemometer.

The Testo 0554 4173 Flow Straightener Set includes the Testovent 417 Volume Flow Straightener as well as two funnels for ventilation grilles and plate outlets. The funnels and the flow straightener can be conveniently transported in the included practical case.

To measure the volume flow, you will also need a compatible vane anemometer, which you can order separately - for example, the testo 417 vane anemometer or the vane probes (100 mm dia.) for the testo 435 and testo 480.