The GP-4 and Mark-4 Yo-Yo sensors are designed to provide accurate, reliable inventory management information for tanks and silos. The GP-4 is housed in a NEMA 4 enclosure, and the Mark-4 is housed in a NEMA 4/7/9 enclosure. The Bindicator remote display/programmer can request readings, monitor up to 99 GP-4 and Mark-4 sensors, and program silo parameters. The display/programmer is used to configure a single sensor or a whole system. An adjustable autotimer allows the user to set automatic measurement cycles ranging from 2 minutes to 1 week. While in operating mode, the display will show the sensor address, sensor name, measurement in the specified units, percentage, display mode and the status of the current device. The display can be used with the Yo-Yo display/programmer or the Bindicator ORB.