Max Machinery 289 Series Flow Meter Transmitters - Manual (Page 3)

289-760-350 © 1987 (Rev 5/06) Max Machinery, Inc. ( 2 )
The 289 Series Transmitter has an inductive pickup which senses the motion of an internal
flow meter gear. As the tooth of a gear moves under the core of the pickup, a voltage is
induced in a coil wound around the core. The gear is fastened to the rotor shaft of the 240
Series meter, which allows its rotational rate to be directly proportional to the flow rate.
The output of the pickup coil is amplified and squared before being sent to the output
terminals. The resulting pulse train is relatively insensitive to interference and can be
transmitted as far as generally required.
General Description