Part of the Omron Fiber-Amplified Photoelectric Sensors series — see the full model table, lifecycle status and replacement parts.
Omron E32-C91N 2M — M3 Reflective Fiber Cable, 2 m
SKU: E32-C91N 2MUSD 86.00
E32-series M3 threaded diffuse-reflective fiber optic cable with 2 m free-cutting lead
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Product Overview
The Omron E32-C91N 2M is a single-head diffuse-reflective fiber optic cable in the E32 family. manufactured by Omron Corporation. Hengyixin Automation ships this sensor from our Xiamen warehouse with a 30-day DOA return window and a datasheet PDF included in the box.
One head does both the emitting and receiving -- it shines light out, the target bounces some of it back, and the amplifier (sold separately) registers the detection. The head is M3 threaded and ships with a nickel-plated brass nut and washer, so it mounts into a thin bracket, a small nozzle, or a sensor holder next to a feeder track.
The E32-C91N 2M ships from Xiamen with full datasheet documentation. Do not bend the fiber below R25 mm -- the plastic fiber breaks and light output drops sharply.
Key Features
- Permissible bending radius R25 mm (smaller bends break the fiber)
- E32-series diffuse-reflective fiber optic cable (single-head reflective)
- 2 m PVC-jacketed plastic fiber, free-cutting on site
- M3 threaded head with nickel-plated brass nut and washer included
- SKU: E32-C91N 2M
- Series: E32-C91N
Best-Fit Applications
- PCB-component presence check on a pick-and-place station with a 5 to 30 mm target distance
- Liquid-level detection inside a small transparent tube (with the matching E39-RP reflectors where needed)
- Label-edge detection on a transparent or printed web where a coaxial fiber helps ignore background
Buying Checklist
- Pick an E3X-NA11 2M or E3X-NA41 2M basic amplifier to pair with the cable for most panel setups.
- Pick E32-T11N instead when the install needs through-beam (separate emitter + receiver pair).
- Pick E32-C91N 2M for a 2 m M3 diffuse-reflective head -- order the amplifier separately.
Technical Specifications
| Sensing Method | Diffuse-reflective (single head; emits and receives through one head) |
|---|---|
| Head Thread | M3 with brass nut and washer supplied |
| Fiber Core | Coaxial plastic (multi-receiver around emitter) |
| Cable Length | 2 m, free-cut, PVC jacket |
| Bend Radius | R25 mm minimum |
| Operating Temperature | -40 to +70 deg C |
| Sensing Distance | Set by the paired amplifier (not by the cable) |
| Compatible Amplifier | E3X-NA11 2M / E3X-NA41 2M / E3X-SD / E3X-HD / E3X-ZV11 / E3X-DA-S (sold separately) |
| Tightening Torque | 0.78 N.m max at the M3 nut |
| Mounting Hole | M3 +0.5 mm clearance hole |
FAQ for E32-C91N 2M
Does E32-C91N 2M work without an amplifier?
No. The E32-C91N is only the passive fiber cable. It carries the light from the amplifier's LED to the target and back, but it carries no electronics of its own. To get a usable output, pair it with an E3X-series amplifier (the E3X-NA11 2M, E3X-ZV11, or E3X-HD are the common picks). The amplifier carries the light source, sensitivity adjustment, indicator LED, and switching output.
Is the E32-C91N through-beam or reflective?
Diffuse-reflective. A single head does both the emitting and receiving -- the light shines out, the target reflects some of it back into the same fiber, and the amplifier registers the detection. If the install needs a separate emitter + receiver pair across a gap, pick a T1x or T2x through-beam fiber (E32-T11N, E32-T21N) -- the model code letter ('T' vs 'C') tells the principle at a glance.
How small a target can E32-C91N 2M detect?
The headline figure depends on the amplifier, the target's color and reflectivity, and the set distance. With an E3X-NA amplifier on standard sensitivity the E32-C91N typically picks up a 0.05 mm dia. opaque wire at close range; the coaxial core helps stabilize small-target pickup. For very small targets at longer distance, add an E39-F3 lens attachment to focus the spot.
Can I shorten the E32-C91N 2 m cable?
Yes -- the 'free-cutting' label in the catalog means exactly that. Use a sharp blade to cut the fiber square (not angled) at the new end face, then insert the trimmed end into the amplifier's fiber lock. Do not bend the cable tighter than R25 mm; tighter bends cause internal fiber breaks and the amplifier will not pick up return light reliably.
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