Omron E3T-SL11 Photoelectric Sensor: Complete Guide for Industrial Automation Applications

12. leden 2026

Historical parts record: Photos and notes below belong to this record. Confirm the offered unit’s full model, condition and available test evidence before ordering.

What is the Omron E3T-SL11?

The E3T-SL11 is Omron's slim-profile photoelectric switch — an amplifier-built-in sensor in a body thin enough to mount where a standard cylindrical sensor has no room: alongside a conveyor guide, inside a printer frame, between stacking trays. The factory bag states the whole spec: TYPE E3T-SL11, PHOTOELECTRIC SWITCH, VOLTS 12 to 24 V DC, 2 m cable, LOT No. 18732, MADE IN JAPAN, CE and RoHS marks, with the Japanese instruction sheet inside. The three-conductor lead (brown, blue, black) is the DC three-wire convention — supply, 0 V, switched NPN output — and the small hardware set (mounting washers, bracket screws) ships in the bag. 99% condition in original packaging; the intake record books thirty units while the photo set shows the bagged stock, and both counts are stated as recorded. All 9 photos and 1 video below show these exact switches.

2 min readContent reviewed 8 October 2026

Part details

E3T-SL11, as printed on the factory bag label
Field	Value
Model	Omron E3T-SL11
Type	Slim-profile photoelectric switch, amplifier built in
Supply	12 to 24 V DC (bag label)
Connection	2 m pre-wired cable, three conductors (brown / blue / black)
Lot	18732, barcode 4 576482 024040
Approvals	CE, RoHS — MADE IN JAPAN (bag label)
Included per set	Sensor, mounting washers/hardware, Japanese instruction sheet
Quantity	Bagged stock shown in the photo set; intake record books 30 units — both as recorded
Shipping weight	0.5 kg per set as recorded

Scroll sideways to see the full table.

Values are read from the factory bag labels and the photographed hardware in the photo set.

Why slim matters in packaging machines

Packaging and printing machines fill their frames with rollers, webs and folders, and the space left for a sensor is often a slot narrower than a finger. Omron built the E3T series for exactly those slots: the amplifier lives inside the thin body, the optics sit on the narrow face, and the mounting holes run through the flats so the switch bolts flush against the machine wall. The 12-24 V DC class covers every control panel from 12 V logic supplies to standard 24 V cabinets, and the three-wire NPN lead lands on the PLC input the same way every Omron three-wire sensor does — brown to +, blue to 0 V, black to the input — so replacements are colour-matched swaps, not rewiring projects. The 2-metre lead reaches the terminal strip in most machine frames without an extension. Japanese production, 99% condition, factory bagged with the instruction sheet: this is the grade of stock that goes straight onto a machine when a packaging line's registration sensors start failing, and the bagged quantity photographed here is a working bench inventory for exactly that maintenance cycle.