The 3H single probe and 26M plug-in control can be used to control liquid levels in commercial hot water heaters. The Series 3H probe features one-piece construction and can be installed directly through the top of the boiler with a rubber boot. The 26M control module is designed for fast installation and all electrical components are protected inside a sealed plastic housing. The entire module can be installed and removed by means for an 11-pin plug.
—Warrick Controls, Inc.