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testovent 410, воронка для измерения объемного расхода, с чехлом для переноски_x000D_ testovent 410, воронка для измерения объемного расхода, D 340 мм/330х330 мм, с чехлом для переноски_x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ testovent 410 vollume flow measuring funnel_x000D_ _x000D_ _x000D_ _x000D_ _x000D_ testovent 410 vollume flow measuring funnel_x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ The funnels for volume flow measurement allow the determination of volume flow (in m?/h) in combination with thermal or vane anemometers. _x000D_ The funnels can be used on ventilation systems which withdraw air from rooms via adjustable cross-sections._x000D_ 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._x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_