OMNTEC sensors are most known for their ease of installation, reliability, cost-effectiveness and remote testability. Electro-optic technology provides accurate and continuous monitoring. Ruggedly constructed, these solid-state sensors are UL listed and Third-party certified. A distinguishing feature of OMNTEC sensors is that they can be tested remotely with the press of a single button.The L-series sensors are designed to provide product-level alarms for high, caution or low product levels. L-series sensors can be remotely tested without removal. This sensor is available with multiple alarm points.The L-1-L is a 20 inch single alarm point level sensor.