Hydrolevel controls utilize a non-moving, electronic probe to sense liquid levels. The probe can be installed in an equalizing line or directly into a boiler or water tank. The probe works on the simple principle that water is an electrical conductor. When water is in contact with the probe, it completes a circuit between the stainless steel probe tip and the tank or boiler surface in which the probe is installed. When the water level drops below the probe, the circuit opens.

Hydrolevel controls transform this simple water-sensing circuit into a relay signal that can be used to operate burners, pumps, alarms, feeders, or other electric equipment. In its simplest form, a Hydrolevel low water cut-off for a hydronic heating system uses the water signal to allow the burner to continue operating. If the water level drops below the probe, the circuit opens and the cut-off safely shuts down the burner.

With a variety of single and multi-probe configurations, Hydrolevel incorporates this same technology into a complete line of liquid level controls, including low water cut-offs for steam and hot water boilers, multi-purpose tank level controls, and condensate pump controllers.

Since 1965, the probe has demonstrated its superior performance. By eliminating expensive repairs and replacement parts common with float-type controls, Hydrolevel has become the recognized choice of engineers and contractors serving a variety of level control needs.