Using AT200CHIM washer sensor

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donmac

Member
Jun 3, 2015
61
Cincinnati Ohio
Initially installed the washer sensor on an uninsulated section of 6" flex liner above wb insert but below the block off plate.
I decided to insulate this short run of liner (about 9") and covered the sensor with the liner insulation (1/2 " foil face) used for the rest of the liner.
The temp readings between before and after differ by about 250-300 degrees. Old cruising temp was about 500-550 degrees and new temp is around 750-850 degrees. I do have surface mounted thermometers on face of the insert (PE Summit) and they read 550-650 degrees when cruising.
Does it make sense to remove the insulation around the sensor or leave it alone. The sensor is rated to 1650 degrees so I don't think it is getting too hot but would appreciate feedback.

[Hearth.com] Using AT200CHIM washer sensor
 
You can leave it alone. It sounds like the sensor is now acting more like a probe sensor, which is a good thing. Now try getting the flue temps a bit lower by closing down the air sooner and maybe burning thicker splits.
 
I have a pre insulated line with the washer probe. I stuffed the washer as far up under the insulation ext the the inside liner as a could. Probably 4-6” above the stove outlet. Those temps seem high. On cruise my washer temp is 50 degrees above stove top. I have my alarm set at 700. I will probably switch to a probe thermal couple. Washer responds to slow when I turn the stove down and I will choke the fire more often now compared to when I have the washer under a small weight on the stovetop.

Evan