Weko AA 7904 Sensor

The Weko AA 7904 is a high‑resolution photoelectric sensor used for precise position detection in industrial automation lines. Common failure modes for this model include optical element contamination or misalignment, LED/photodiode degradation, and power supply ripple causing signal drift. First‑check diagnostics: verify 24 VDC input stability with an oscilloscope, inspect the lens and housing for dust or physical damage, and confirm output logic levels against the data sheet using a multimeter or logic analyzer.[oss-gpt-20b]

Need your Weko repaired or tested?

We specialize in the repair and refurbishment of high-end industrial control electronics and power systems like this unit.

⚙️ Fast Diagnostics – Same-day evaluation available
🔁 Reliable Turnaround – Most jobs ship within 5–10 business days
🧰 Expert Technicians – Decades of board-level experience
✅ 1-Year Warranty – Every repair fully guaranteed

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We reclaim and repair GPUs and industrial AI hardware (cards, PSUs, fan modules, VRM boards). Free estimate — you only pay return shipping if you decline.