Furnace Lid open switch

[karivelm]

Hello,

Does anybody have ideas of how I can instrument this furnace to get a confirmation that the lid is open to a PLC.
The lid lifts up & turns to the right it is acuated by a hydraulic cylinder.

The furnace can also tilt forward.

 

[ScottyUK]

Looks like a good application for a proximity switch. A suitable target - e.g. a bolt head mounted on the orange sleeve connected to the cylinder rod - would allow you to monitor both rod extension and rotation. You will need to provide some physical protection for the sensor and its cable if the environment is a typical foundry.

 

[MiketheEngineer]

Find somthing that won't melt!! or move it to some area cooler??

 

[itsmoked]

Need more info. Do you need to know it's just open or open and the door swung out?

If swung out you can tag a bracket onto the box surrounding the hinge and use an inductive proximity sensor to detect the bolt that is visible on the side of the hinge.

Keith Cress
kcress -

http://www.flaminsystems.com

 

[VEBill]

If this is related to a safety critical automatic system, then perhaps the design process should include safety analysis and probably some redundant sensors. If it's just a lock-out or indicator in a manually operated process, then carry on.