The ECU Series water temperature control unit has an immersion-style Incoloy(r) heater and a bronze-fitted centrifugal pump, as well as independent high-temperature safety thermostat, adjustable low supply water pressure switch and 150 psi pressure relief valve. Models are available from 0.75 to 7.5 hp, with solenoid valves up to 0.75 in. (19 mm). NPT. The microprocessor-based PID controller displays process and setpoint LED readouts, with indicator and warning lights. The electrical enclosure has branch fusing and meets NEMA 1 electrical standards.