The volsentec FM series high performance Non-contac reflection digital fiber amplifier is available in two models: FM-N11 and FM-P11. The FM-N11 features an NPN output for reflection mode, while the FM-P11 offers a PNP output for the same reflection mode. Both models are designed with advanced non-contact detection capabilities and incorporate automatic light compensation technology. This technology ensures the stability and accuracy of detection by automatically adjusting fo