CAT Thermometer

[Murray01]

Pictures are of the end of the CAT Thermometer. Appears to be delaminating.

Is this normal? Warranty?

First fire was October 2025, burnt about 3 cords of Jack Pine in a new stove.

 

[stoveliker]

Makes me wonder how your flue looks like, given the shiny stuff.

Some delamination from oxidation I see too. I would brush that off with a steel brush as it hinders thermal transport to the core of the rod which transports it to the bimetal coil at the viewing end.

 

[Murray01]

Makes me wonder how your flue looks like, given the shiny stuff.

Some delamination from oxidation I see too. I would brush that off with a steel brush as it hinders thermal transport to the core of the rod which transports it to the bimetal coil at the viewing end.

The picture is after I brushed it off with a wire brush. The shine is from the light coming in a window, out of the light it’s dull.

 

[stoveliker]

Okay.
I've had similar delamination of outer layers. I think oxidation and thermal expansion differences cause this.
I brush it more rigorously than you have done.
I'm not sure how important it is, but one doesn't want to hinder the core of the rod warming up due to loose layers on the outside that shield the core.