Hey guys,
Not strictly PLC related, but I could use some advise. I am needing to sense a donut shaped metal object that is around 550F, and more specifically, trying to make sure that the hole is not too big.
The "donut" itself is around a foot in diameter. The two possible hole sizes I could see, would be approx 2 inches in diameter different.
If everything were cool, I could use a photoelectric sensor and sense the outer edge of the small hole. Then if a "donut" with a big hole were present, the photoeye wouldn't see it and I could stop the process.
However the temperate is killing me. I could use a limit switch with a long arm and back the switch away, but it won't be as precise and I can see people bending arms and what not, defeating the purpose.
Saw in a catalog some fiber optic sensors that I could potentially use, where the cable can withstand high temps. But have no experience with them, so can't attest to their reliability.
Anyone have any other suggestions on how to differentiate between the two "donuts", or have experience with sensors in HOT environments?
Not strictly PLC related, but I could use some advise. I am needing to sense a donut shaped metal object that is around 550F, and more specifically, trying to make sure that the hole is not too big.
The "donut" itself is around a foot in diameter. The two possible hole sizes I could see, would be approx 2 inches in diameter different.
If everything were cool, I could use a photoelectric sensor and sense the outer edge of the small hole. Then if a "donut" with a big hole were present, the photoeye wouldn't see it and I could stop the process.
However the temperate is killing me. I could use a limit switch with a long arm and back the switch away, but it won't be as precise and I can see people bending arms and what not, defeating the purpose.
Saw in a catalog some fiber optic sensors that I could potentially use, where the cable can withstand high temps. But have no experience with them, so can't attest to their reliability.
Anyone have any other suggestions on how to differentiate between the two "donuts", or have experience with sensors in HOT environments?