In an effort to increase the number of pulses/cc that their meters produce, some companies have added pulse multipliers to their output signal. Simply put, these devices fire 2 to 16 times for each input pulse that the meter creates. These are popular when the triggering event is rather far apart. For example, a gear meter which produces one pulse for every tooth that passes below a proximity sensor.
Under the assumption that they can predict that the meter is incrementally moving, the manufacturer produces a burst of pulses to increase the pulse count and meter's K-Factor. These pulses are not tied to any discrete amount of fluid flow. These made-up pulses will interfere with leak testing and low flow measurements.
Bi-directional measurement will also inherit the uncertainty caused by the burst of pulses.
For a true, high resolution signal Max transmitters monitor the rotation of an internal magnet and split the rotation into more than 4000 pieces. The software over samples the position of the magnet to ensure a proper placement and creation of each pulse that the meter sends out. Each pulse is directly tied to the motion of fluid in the meter. This direct correspondence makes the Max meters ideal for low flow rate measurement, leak testing and bi-directional flow measurement.