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Running round stock through oven

Running round stock through oven

Running round stock through oven

(OP)
I run round stock in various diameters going through the oven horizontally rolling down being pushed by a chain conveyor with peridic ss rods that stick up into the furnace and when then rolling stock runs over it, it depreeses the rod and activates the switch.  That is way it is suppose to work but due to high temerature - 1500 F, sometimes it doesn't work - anyone have any experience with anything else?

RE: Running round stock through oven

Could you do something non contact?

RE: Running round stock through oven

(OP)
Yes, I could do non contact but will it handle th temperature?

RE: Running round stock through oven

Possibly.  It would depend upon useful sensing distance.  Hall effect sensors have a rather short range whereas some optical/machine vision systems would have longer range but may loose precision due to atmospheric distortion within the oven.  Another possiblitity (though expensive) is to actively cool the sensor/detector to keep it within an acceptable thermal range.  We did this when I worked on semiconductor processing equipment but then again we had ready access to a chiller and coolant as a standard part of the system.

Regards,

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