Built-in Photomicrosensor - Mounted with M3 screws - 5 VDC and 24 VDC power supply types are available - Photo IC output (Dark-ON/Light-ON) - Connector with secure lock compatible with JST GHR-03 - Equipped with a Zener diode, which increases noise immunity (for EE-SX3173/4173-P3-Z only) - Connector with cable is also available (order separately) EE-5002 1M https://elecena.pl/product/18322853/eesx3173p2-forked-light-barrier-5-v-5mm-dark-on 2021-05-03 https://elecena.pl/product/18322853/eesx3173p2-forked-light-barrier-5-v-5mm-dark-on 2021-06-16