BF3R Series, a fiber optic amplifier with built-in twin jog-dials, features precise control of sensitivity using coarse-dial and fine-dial. This series offers fast and accurate sensing performance with fast response speed of under 1ms. Also, this series employs free-cut type fiber optic cables. ic cable in the amplifier slowly. 21mm) 3 Close this position will be B position. This rd(+), thenBF3RX-P, Autonics Fiber Optic Sensor, Best Price in Town, Guaranteed Low Price!Fiber optics sensors consist of optical fiber cables and amplifiers without lenses that are absolute must in photo sensors. The weight in parenthesis is for unit only. Otherwise, it may cause unexpected accidents.