The Flowline DataView LC09-0000 is a universal programmable level controller that converts a single 4–20 mA or 0–10 VDC level sensor input into relay-driven pump and valve control for storage tanks, silos, and process vessels. Housed in a 1/8 DIN NEMA 4X panel-mount enclosure, it integrates level display, alarm annunciation, and automatic fill/empty logic in one compact instrument.

How does automatic fill and empty control work?

Each relay can be programmed for single setpoint (high or low alarm) or dual setpoint latching mode. In dual setpoint mode for automatic fill, the relay energizes when the level drops below the lower setpoint and remains latched until the upper setpoint is reached — preventing pump short-cycling. For empty (discharge) control, the logic reverses: the relay activates at the upper setpoint and holds until the tank drains to the lower threshold. A 32-point linearization table corrects for non-linear tank geometries, converting the sensor mA signal into true volume units for cylindrical, spherical, or conical-bottom vessels.

What makes it suitable for industrial tank monitoring?

The LC09-0000 supplies isolated 24 VDC loop power to the sensor while simultaneously reading the 4–20 mA signal, eliminating the need for a separate transmitter power supply. An isolated 4–20 mA repeater output retransmits the scaled level to a PLC, SCADA, or remote display. The dual-line LED readout shows the measured value on the 6-digit upper line and engineering units or setpoint status on the lower line. All configuration is performed through the front-panel push buttons with password-protected non-volatile memory — no software or handheld communicator required.