The funnels for volume flow measurement allow the determination of volume flow (in m³/h) in combination with thermal or vane anemometers. 
	The funnels can be used on ventilation systems which withdraw air from rooms via adjustable cross-sections.
	Depending on the size of the air vent and the volume flow, it is possible to choose from two selectable funnels. For testovent 410, a maximum edge length of 330 mm and a maximum diameter of 340 mm apply.

More applications, less equipment: if you already own one of our probes with a universal handle, you can easily expand your portfolio of probes with the 16 mm vane probe head.

For measurements in ventilation ducts: use the hot wire probe (with the compatible measuring instrument) to measure air velocity, volume flow, air temperature and humidity. The readings are transmitted directly to your measuring instrument via Bluetooth, making your measurements particularly convenient.

For measurements in ventilation ducts: use the hot wire probe (with the compatible measuring instrument) to measure air velocity, volume flow, air temperature and humidity.

For measurements in ventilation ducts: use the hot wire probe (with the compatible measuring instrument) to measure air velocity, volume flow and air temperature.

<div style="background-color:#dae4ea; border: 1px solid #648798; padding: 10px;">Product no longer available. Have you checked out its successor? Why not enjoy the benefits that it has to offer: <a href="…/p/0635-1572">>> To the product (fixed cable)</a> <a href="…/p/0635-1571">>> To the product (wireless, with Bluetooth)</a> Please note that the successor products are only compatible with testo 400 or testo 440.</div>

The hot wire probe (in conjunction with the appropriate measuring instrument) is ideal for determining flow velocity and temperature in ventilation ducts or at plate outlets and ventilation grilles.

More applications, less equipment: if you already own one of our probes with a universal handle, you can easily expand your portfolio of probes with the hot wire probe head.

For measurements in ventilation ducts: use the vane probe (with the compatible measuring instrument) to measure air velocity, volume flow and air temperature. The readings are transmitted directly to your measuring instrument via Bluetooth, making your measurements particularly convenient.

For measurements in ventilation ducts: use the vane probe (with the compatible measuring instrument) to measure air velocity, volume flow and air temperature.

For measurements in ventilation ducts: use the vane probe (with the compatible measuring instrument) to measure air velocity and volume flow.

Use the testo 405 thermal anemometer to measure air velocity, volumetric flow and air temperature. It is suitable for carrying out quick check measurements in ventilation ducts and for measuring the air velocity in rooms, e.g. at draughty windows.

<div style="background-color:#dae4ea; border: 1px solid #648798; padding: 10px;">Product no longer available. Have you checked out its successors? Why not enjoy the benefits that they have to offer: <a href="https://www.testo.com/multifunction">>> To the products</a></div>

Kit for carrying out measurements in ventilation ducts: the testo 440 air velocity and IAQ measuring instrument and the vane probe (Ø 16 mm) are safely stowed away in the case. So you can get down to work straight away!

Kit for carrying out measurements in ventilation ducts and at air outlets: The testo 440 air velocity and IAQ measuring instrument, the vane probe (Ø 100 mm) with Bluetooth&reg; including temperature sensor and the hot wire probe including temperature sensor are all safely stowed away in the case. So you can get down to work straight away!

Kit for carrying out measurements in ventilation ducts and at air outlets: The testo 440 air velocity and IAQ measuring instrument, the vane probe (Ø 100 mm) with Bluetooth&reg; including temperature sensor and the vane probe (Ø 16 mm) are all safely stowed away in the case. So you can get down to work straight away!

Kit for carrying out measurements in ventilation ducts: the testo 440 air velocity and IAQ measuring instrument and the hot wire probe (Ø 9 mm) including temperature sensor are all safely stowed away in the case. So you can get down to work straight away!

Carry out measurements without any annoying cables: use the kit to handle all relevant measurements in ventilation ducts and at air/ceiling outlets. You will receive the testo 440 dP air velocity and IAQ measuring instrument including differential pressure sensor and the 100 mm vane probe head and hot wire probe head (Ø 9 mm) for attachment to the universal Bluetooth&reg; handle supplied. To make measurements more convenient, both probe heads can be combined with the telescope included in the kit. The equipment can be transported safely and conveniently in the robust case.

Carry out measurements without any annoying cables: use the kit to handle all relevant measurements in ventilation ducts and at air/ceiling outlets. You will receive the testo 440 dP air velocity and IAQ measuring instrument including differential pressure sensor, two vane probe heads (Ø 100 mm and Ø 16 mm) and a humidity/temperature probe head – all three can be attached to the universal Bluetooth&reg; handle supplied. To make measurements more convenient, both vane probe heads can be combined with the telescope included in the kit. The equipment can be transported safely and conveniently in the robust case.

<div style="background-color:#dae4ea; border: 1px solid #648798; padding: 10px;">Product no longer available. Have you checked out its successor? Why not enjoy the benefits that it has to offer: <a href="…/p/0560-0400">>> To the product</a></div>

Ideal kit for IAQ professionals, with a focus on air flow measurement. You will receive the testo 400 universal IAQ measuring instrument with intuitive measurement menus, one vane probe head (Ø 16 mm), one vane probe head (Ø 100 mm) and one high-precision humidity/temperature probe head – all three can be attached to the Bluetooth&reg; handle supplied. For measurements at ceiling outlets, simply combine the 100 mm vane probe with the telescope (can be extended up to 1.0 m) and the 90° angle.

Ideal kit for IAQ professionals, with a focus on air flow measurement. You will receive the testo 400 universal IAQ measuring instrument with intuitive measurement menus, one hot wire probe head (including temperature and humidity sensor), one vane probe head (Ø 100 mm) and one high-precision humidity/temperature probe head – all three can be attached to the Bluetooth&reg; handle supplied. For measurements at ceiling outlets, simply combine the 100 mm vane probe with the telescope (can be extended up to 1.0 m) and the 90° angle.

testovent 410, volume flow funnel, Ø 340 mm/330x330 mm, incl...

testovent 410, volume flow funnel, Ø 340 mm/330x330 mm, incl...

testovent 410 vollume flow measuring funnel