39155R.S Genie Optical Encoder - RPM Sensor
The Optical Encoder - RPM Sensor is used with various Genie screw drive garage door openers. Replacing the Optical Encoder - RPM Sensor may resolve any issue of short traveling problems or limits drifting on the garage door opener.
Use With DC Screw Drive Opener Models: TriloG™1200 (3064), TriloG™ 1500 (4064), PowerMax® 1200 (3062).
Use With DC Screw Drive Opener Models:  MachForce, PowerMax® 1500, Excelerator® 1000, Excelerator® II (4062).