This Omron E3ZG61M3JOMS is a through-beam photoelectric sensor from the E3Z series, outputting NPN (sinking) with a 25 mm sensing gap. It runs on 12-24 V and switches a load up to 100 mA with a 1 ms response time. The M8 4-pin connector keeps wiring standardized for field replacement, and the IP64 rating handles dust and splash from washdowns. Sits in a 11×40×50 mm block — slim enough for tight panel gaps or machine frames.
NPN vs PNP variants
E3ZG61M3JOMS and E3ZG62M3JOMS share identical ratings: NPN, 25 mm, 12-24 V, 1 ms, M8 connector, IP64. For PNP output, the E3ZG81M3JOMS or E3ZG82M3JOMS share all other ratings.