Reed Switch Flow Meter

The rotating magnet makes a reed switch open 4. These dry contact reed switches are hermetically sealed and have a 5 foot cable lead. The magnet is confined in the casing and drives the external gear counter through the magnetic flux.

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We offer one of the industry s broadest lines of sensors switches and transmitters to measure and control flow pressure level and temperature.

Reed switch flow meter.

This system uses two reed switches to detect the rotating magnet inside the meter. A flow sensor or a flow meter is a device used to quantify the volume of fluid passing through a point in a pipe. The upcounter will be added up by one the tidub33 december 2015 flow measurement with reed switches and ble. For decades kobold has been a world leader in process measurement and control solutions.

A typical reed switch flow meter works something like this. Reed switch based flow sensors are built with a paddle having multiple magnets or a single multi pole magnet that continuously triggers the reed switch to generate a square wave output that can be translated to volume of fluid. As a passive pulser the reed sensor is designed as a potential free normally open contact. As the liquid flows the paddle spins and makes a magnet rotate 3.

They all attach to the meter with a single screw and positioning is fool proof due to the shape of the switch. There s a pipe through which liquid flows 1 with a paddle wheel mounted inside it 2. The cable has 2 wires for single pulse switches and 3 wires for double pulse. It is closed with a frequency proportional to the flow rate by a serially integrated magnet within the counter and opens itself automatically again.