MR 125 measuring ring

The MR measuring ring is designed for fast and accurate air flow measurements for circular ducts.

- operates independently of the air flow direction
- solid construction
- easy cleaning of the duct for the version with inspection door

Construction

The housing of the MR measuring ring is made of galvanized steel sheet, the measuring ring and the taps for the manometer connection are made of aluminium. The NTL inspection door is made of galvanized sheet steel. Sizes 100 ... 400 are supplied with a single-edge seal.

Installation

The MR measuring ring is connected to the pipe by rivets or self-tapping screws. See the following page for more information on recommended placement in the piping system.

Air flow measurement

The MR is provided with outlets for connecting a pressure differential (pm) gauge, which can be used directly to calculate airflow values using the values of the constant k and the correction factor X (see tables). The diagrams given here in the catalogue are used to select the appropriate size when considering the pressure drop p_t.