VC WW Small Catalytic Probe Installation

I want to be able to run my Vermont Casting WinterWarm Small at the lowest heat output that still minimizes emissions by properly activating the catalytic combustor. We have a good number of mild winter days. When I run it at low heat outputs, there is visible smoke. I don't really like running up and down 3 flights of stairs to check the smoke output.

I have read about temperature probes for the catalytic combustor but I have a couple of questions. First, would that be a smart solution for me? Second, how should it best be installed? The WinterWarm Small unit does not have a planned spot to place one.

Any help would be appreciated.