PL120: This control is small in size and can be used to regulate the input voltage of resistive devices by turning the dial knob. Just plug your resistive load into the receptacle on the back, turn on the switch and adjust the dial. The higher the number on the dial, the hotter your load will get. This unit comes with a 6’ attached power cord and lattice support bracket, which is ideal for fume hood mounting to maximize bench space.
PL312: This timed control turns the output load on and off and then repeats the cycle. Each position on the knob from LO to HI represents a specific cycle time where the on time ranges from 6 to 100 percent. For example the LO setting represents a total cycle of 60 seconds with an on time of 4 seconds. This type of control can be used to regulate the temperature of resistive loads. The pilot light on the front will glow when the load is on. The unit comes with a 6’ attached power cord.