Home > Generic Treadmills > 4 Pin Universal Treadmill Light Sensor Tachometer 4 Pin Universal Treadmill Light Sensor Tachometer Speed Sensor Treadmill Accessories Repair Parts Universal Treadmill Light Sensor Tachometer Speed Sensor 4Pin for Treadmill Accessories Repair Parts. Price: $23.40 Note: Prices on some products change frequently. To see more details, check the latest price, or to purchase, please visit the link below: