What it is and what it does
The E3FB-TP112M is a through-beam photoelectric sensor set — transmitter and receiver — in Omron’s E3FB series. It throws a 20 m red-light beam and reliably detects opaque objects down to 7 mm diameter. The 18 mm M18 threaded brass cylinder is sealed to IP67 and IP69K, so it survives washdown and high-pressure cleaning in food or packaging lines. Output is PNP, 10-30V DC supply, 100 mA load max. Selectable Light On / Dark On covers both presence and absence detection. Response time is 0.5 msec — fast enough for counting applications.
How it compares to close peers
The E3FB-TN112M is the same physical sensor with NPN output instead of PNP. If your PLC input card expects a sinking signal, go with the TN112M; otherwise everything else — M18 thread, 20 m range, 2 m cable, brass body, IP ratings — is identical. The E3FB-TP21 keeps the PNP output but swaps the 2 m cable for an M12 connector, useful on conveyor sections or turntables that get frequently swapped for cleaning.
Lifecycle and compliance
Listed as current production. CE marked per the spec table. Built-in protection against output short circuits and reverse polarity on both supply and output — no external diode needed.
Mounting and wiring notes
M18 threaded body mounts through a 18 mm hole. Overall height 44 mm. Cable exits via right-angle face — pull the 2 m bare-wire lead to your terminal block. Strip and terminate as per your panel wiring. Selectable switching mode via a control lead or programming (refer to the sensor’s connection diagram).