Robertshaw D1 Series Thermostats D1H20420400

The Robertshaw D1H20420400 Series Thermostat is a heavy-duty control designed for use in harsh applications where precise temperature control is required. The thermostat uses a double pole single throw (DPST) snap-action mechanism that is instantaneous, positive and non-fatiguing. The D1 Series is recommended for applications that require double pole operation and accurate temperature control.