Must admit thats news to me. I've used stirrer hotplates with stainless steel beakers , and a temperature probe which sits in the mix in a commercial development lab for toiletries making hot mix emulsions. Nothing in the manual about that.
The hotplates get hammered daily 5 days a week, Minimum 8 batches of up to 5kg each a day, and the only failures we've had are due to operator stupidity.
The most common failures are: Burning through the probe cable by letting it drape over the hotplate, and using a prop stirrer and catching the probe around the shaft and corkscrewing it!
These are the direct heated metal topped ones mind, not the rinky-dink halogen ones, and they're not designed for single degree accuracy, just enough control to get an oil phase up to 70 celsius, and hold it there without the temperature shooting above 100 and filling the lab with smoke
You're obviously using high quality scientific ones instead, designed for exact control, and good stability
I agree about the steam bath about being controllable, but they're too slow in heating for my work.
Interesting to compare how another industry works
That beats them all, and there is nothing like a steam CTB for temperature control with a cold water sparger on the cold side. Makes me homesick thinking about it.
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