Bubbles with a device that constantly switches

I have a heating type device that turns on and off every second or two to maintain temp.
Is there anyway to prevent this device’s bubble from flashing but retain the device and it’s data gathering?
My bubbles look like a lava lamp making it difficult to read or tap other bubbles with this one constantly appearing and disappearing moving all the others around in the process.

I do not have an answer but, is this frequent on/off ‘normal’ for such device? I would guess not, as that introduces some electrical ‘wear’ after a while.