The HLA Liquid Level Alarm Series from See Water includes the HLA Type 1 indoor-rated alarm, the HLA-4X indoor/outdoor robust alarm and the HLA-4X-X, which is available in a variety of models ranging from two to 10 alarm points. The alarm panels are ideal for tank monitoring, sewage pump chambers, sump pump basins and other liquid level monitoring applications. They are UL listed. 888/733-9283; www.seewaterinc.com.