Replacement Photoelectric Sensors & Reflectors

Send the full sensor model, wiring label, and a photo of what the sensor faces. That helps us identify whether you need a photoeye, reflector, emitter and receiver pair, or mounting bracket.

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Industrial photoelectric sensor with a prismatic reflector and a separate emitter and receiver pair — Illustrative product image

Photoelectric Sensor Not Detecting? Troubleshoot a Photoeye

How to measure a photoelectric sensor

Record the body height, width, depth, and mounting hole centers. Note which face carries the lens and how the connector or cable exits. Measure the installed distance along the beam to the reflector, receiver, or target. Use that measurement and the model data sheet to check the working range.

Where to measure

Reference drawings. Verify dimensions on your part or the manufacturer’s drawing.

Housing and mounting hole centers

Measure the housing face-to-face, then measure between mounting hole centers. Note the optical face position and leave room for the cable or connector.

Installed distance along the beam

Measure from the sensor’s optical face to the reflector, receiver, or target surface for your sensing mode. Use the model data sheet to confirm its specified reference points and working range.

What to include in a photoeye quote

Include the sensing mode, supply voltage, output type such as PNP or NPN, light-on or dark-on behavior, and connector type or cable length. For a through-beam set, send both model numbers. For a retroreflective sensor, include the reflector model or dimensions and note whether the target is clear, glossy, or opaque.

See the proximity sensor measurement guide.

Manufacturer reference SICK photoelectric sensing modes