SJE-Rhombus Level Monitor CL (no C-Level™ sensor)SJE Rhombus Level Monitor CL System Description The SJE Level Monitor CL system is a convenient way to monitor tank levels by utilizing a scalable LED bar graph to represent the level as a percentage of a full tank. The adjustable alarm is easy to set using the alarm level and set buttons on the touch pad. As the liquid level reaches the installer specified setpoint, the audible and visual alarms are activated. The audible alarm can be silenced using