one of a series of devices that continuously monitor the level of the drilling mud in the mud tanks. The indicator usually consists of float devices in the mud tanks that sense the mud level and transmit data to a recording and alarm device (a pit-volume recorder) mounted near the driller’s position on the rig [...]

the gauge at the driller’s position that records data from the pit-level indicator.

trade name for a type of pit-level indicator. See pit-level indicator.