Liquid level gauge for extinguisher systems

An ultrasonic liquid level comparitor for marine fire extinguisher systems, installed in single or two to three skid-mounted rows, is available from Link Instruments. The comparitor compares below-liquid gas level ultrasonic echoes with the surface acoustic wave. This produces an enhanced propagation across the liquid gas to identify the liquid level. Levels of CO2, Halon, FM200 and other equivalents can be compared and located, says Link. The transducer is placed below level and moved up the extinguisher until the surface acoustic wave is shown on the display indicating the liquid level. The unit comes with, transducer, gel, transducer extension pole, batteries, carry case and instructions.