Proportional Power Controller
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Proportional Power Controller utilizes the Zero Voltage Switching technique to modulate power for a wide range of resistive loads. The output current varies from 0 to 100% with respect to input current (4 to 20 mA), or input voltage (1 to 10V). The company also makes a proportional power controller, whose output varies with the help of external potentiometer.
Other Catalogs (From Venus Electronics) :