Temp Control Thermosat Johnson Controls A19ADB-2 Immersion Hot Water Controller by Penn Baso Counterline NOS 282V. 10 degrees to 240 f 6 ft CAP Manual Reset This Johnson Controls A19ADB-2 thermostat is designed for controlling immersion hot water and is brand new in its original packaging. It is a high-quality product from Industrial MRO, a renowned brand in HVAC and refrigeration parts and accessories. The model A19ADB-2 is specially designed to deliver dependable performance and precise temperature control. It is ideal for use in water heaters, boilers, and other industrial heating applications. With this Johnson Controls thermostat, you can be sure of reliable and efficient operation.