Confirm the exact configuration
Use the manufacturer part number and model code—not appearance alone. Connection, size, material, voltage, pressure, seal, and control options can differ within the same product family.

Omron
The Omron E3RB-TP21 is a cylindrical radial through-beam sensor from the E3FA-E3FB product family, featuring a nickel-plated brass M18 threaded housing with IP67 and IP69K protection. It utilizes a polarity-free red light source to deliver a 15000 mm sensing distance, a 0.5 ms response time, and manual adjustment capabilities across a 10-30 V power supply voltage. This unit provides PNP output with selectable Dark-ON and Light-ON operation modes and connects via an M12 connector. Submit the exact part number, quantity, and application requirements to request a quote.
Industrial and obsolete parts are priced per enquiry: the final price depends on available stock, condition, quantity, and your delivery destination, so a fixed list price would be misleading. Request a quote and we confirm current pricing, lead time, and sourcing options — including hard-to-find and discontinued Omron references — within one business day.
For a faster response, include quantity, condition, and delivery destination.
Verified configuration
Engineering context
Use the manufacturer part number and model code—not appearance alone. Connection, size, material, voltage, pressure, seal, and control options can differ within the same product family.
Provide quantity, delivery country and ZIP/postal code, required condition, target date, and photographs of the existing nameplate when available.
Our sourcing response is prepared against Omron E3RB-TP21. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.