Red Lion Controls ZGG0010CProduct Attribute Attribute Value Series ZGG Series Type PID Temperature Controller Overview The units are rugged, incremental encoders that convert shaft rotation into a current sinking pulse train. Internally, a single LED. light source and a photologic sensor in conjunction with a shaft mounted, durable, metal etched encoder disc, provides signal accuracy and reliability to 10 KHz. The DC input power supply requirement is a versatile 8 to 35 VDC,