Thoughts on this Flue Temp Sensor

[fao1989]

Fellow Woodburners:

Happy with my BK A25. Installed in masonry/brick fireplace.
Considering a Magnetic sensor on liner or insert top, behind the cover, near the collar.

Attracted to the idea that this type might avoid me having to pull out blocker plate (already installed) or drill into the flue liner.
The video and sales page claim the connection is good to 800 C, which is clearly sufficient for the application.

Interested in your Thoughts.

video:

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Source page: https://tempsure.net/product/tempsure-wifi-module-kit/

Thanks!

 

[begreen]

I wouldn't cut or drill into the flex liner, especially if it is a thin one.

 

[fao1989]

I wouldn't cut or drill into the flex liner, especially if it is a thin one.

Thank you begreen. Concur.

That's what drew me to the idea of a magnetic probe that i might be able to place on the insert neat the collar somewhere, but behind the decorative A25 fireplace surround. Wouldn't be as instantaneous or accurate as a flue gas monitor, but would give a fair reading of the top temps near the exit point near the collar.

 

[begreen]

Yes, that's a better plan. Does the flue collar have a neck that it could attach to? If not, the stove top, maybe switch to a probe that is compatible and attach that through the appliance adapter?

 

[fao1989]

The A25 manual shows a flue collar neck that looks like it might be a good spot. If I can get my hand around there, i might be able to get a good attachment for the magnet at/near the collar assembly. And would avoid moving the insert or altering any of the installation or piercing anything.

The other concern is pulling the K type probe wire between the metal surround shroud and the fireplace brick edge to get the probe connector to the battery powered monitor/display, outside the shroud. I need to do that without subjecting the cable to minor risk of rub-wear over time. I'd need to protect that thin cord with some kind of very thin wedge or metal shim to sustain a small crevice at the bottom shroud edge. Im thinking maybe a metal washer?

What did you mean by: "attach that through the appliance adapter"?

 

[begreen]

The appliance adapter is what connects the liner to the flue collar.

 

[fao1989]

The appliance adapter is what connects the liner to the flue collar.

View attachment 333132 View attachment 333133

Ah.
So thread a probe between, or pierce this connector?

My instinct is to use the magnet connector on the collar and accept the delay/difference in temps from the outside option.

 

[begreen]

It could have a thermocouple washer held captive by the band clamp or an 1/8" hole drilled into the adapter for a 4" probe.

 

[fao1989]

It could have a thermocouple washer held captive by the band clamp or an 1/8" hole drilled into the adapter for a 4" probe

Great options. Presume if I used a 4 in probe, I'd have to pull it out each year for an annual cleaning.