I thought this wasn't out for retail, yet. So I was a little surprised to see on Social Media that a Foto Impex customer already received one. I decided to order one as well. I guess the claim that the PTC element used won't pyrolise the photo chemicals made me choose this one over a generic device.
I only tested it on water in my 1L measuring jug. With 500mL of liquid and the water level half way between min and max levels on the device there was a lot of aeration. 800mL was the max I could fill in and have the heater in there. With the level at the max mark of the heater the mixing was nice and calm.
The heating rate in such a small volume is tremendous (maybe a minute, at most, from 20->42°C). So high that I am wondering if the claim of the PTC element not being as aggressive as a more conventional one is really true. Also the temperature was overshooting by about 1.5°C. So it's better to set the temperature a little lower and rise it after the heat up. Once the actual temperature is at the set point it is kept perfectly constant.
This rapid heating of the developer to an exact temperature will make my process much quicker and more convenient than the slow heating in a water bath. That required a long wait unitl the exact moment the temperature is where it needs to be. Bleach and fixer will still heat in the water bath, but the temperature is not critical and with the heater in the bath it will keep the temperature and I can do something else. Once ready the heater will go into the developer, then a quick rinse and back into the waterbath. And Development can start.
More info on the device:
The powercable is fixed to the device and the labeling (CE, RoHS, but no FCC or UL) suggests that my model is made for the EU market and perhaps others with 230V mains. It takes 220-240V at 50/60Hz. So you could theoretically use the 230V Version with a 1500W transformer on 120V. But they definitely make different models for the 230V and 120V markets.
I tested at 41-42°C for ECN processing, which will be what I'm going to do first. Once I'm through those films I'll mix up my first Kodak Flexicolor kit for the waiting C41 films. I think this gadget will increase my motivation to process my colour film backlog.