The RH-174A-NPN-NC infrared light curtain by SFT is a complete safety sensor system designed for elevators, utilizing infrared transmission to ensure passenger safety. This set includes two light curtain strips, a wiring set, and a power box. While model SFT-620NP-B is a general-purpose version, RH-174A-NPN-NC is specifically designed for ThyssenKrupp elevators. Another variant, SFT-639-AC110, is dedicated for use with Yongda elevators. Please contact customer service for more detailed information.
