A single LTM-2 probe can be installed per column. The LTM-2 probe sends a pulp level signal that is utilized by the column level control system to maintain pulp level depth at setpoint.
Actual pulp level measurement is in the set range below the froth lip height. At the bottom of the bracket is a 40 mm polypropylene bushing to hold the bottom end of the probe steady as well as electronically isolate the probe from the metal bracket. In cases where probes over 2 meters in length are utilised a stabiliser may be used at around 1.5 meters. There is no level measurement in the bushing. Therefore actual maximum possible measuring length is actual probe length-40 mm.

When shipped the full measurement range of the probe is active from the bottom of the probe to the top - calibration in place is required.