FRS Free-Run Speed Sensor

1. Keyence™ Digital Fiber Sensor
2. Fiber Optic Sensor Cable
3. Flexible Arm with Base

• LCD digital display: for easy sensor programming and signal monitoring
• Simple, user friendly functions
• Select light-operate or dark-operate functions

• Composed of a single sensing end that emits a sensing beam and receives reflected light
• Armored ToughFlex™ flexible stainless steel jacket protects fiber from daily wear and resists entanglement or shock
• More flexible than conventional spiral tubes with a tight bend radius of 2 mm and minimal optical attenuation

• Flexible arm enables easy positioning of the sensor end to the motor shaft
• Base is supplied with 8 mm and 10 mm T-nuts for mounting to a PT Series T-slot Base Plate or TAB Series Dynamometer Table

Solution
Magtrol's FRS Free-Run Speed Sensor is designed for applications where it is necessary to acquire speed readings that are unaffected by drag load. Before connecting a motor to the dynamometer, the free-run speed can be obtained from the FRS Sensor. With its reflective sensor, the FRS does not need to be attached to the motor but only placed close to the motor shaft (as shown in the photo to the right). For best contrast, the shaft should be marked with reflective tape.

The sensing end of the fiber optic assembly emits and receives light reflected from the shaft, and sends the speed signal to the fiber optic sensor. The raw speed data is then transmitted to either a Magtrol 3410 Torque Display or DSP7000 Dynamometer Controller where it is converted and displayed in rpm.