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Gems Warrick general purpose open circuit board control with screw mount standoff. New microprocessor design. Engineered for general purpose single level or differential applications, these economy priced controls have spade terminals for easy wiring and provide sensitivities up to 1 million ohm/cm. Applications include single level service, differential service, point level, alarms, valve control, pump control and low water cutoff. Compact size. U.L. "Motor control". Low-Voltage sensor. LED monitoring. AC current minimizes electrolysis. 4.7K ohms inverse sensitivity. 120 VAC voltage. Measures 2-3/16" width by 2-1/2" height.