shadowsnuzzy Senior Member Joined: 8 Jan 2011 Posts: 70 Location: Pleasanton Expertise: Just starting
Posted Sat Apr 20, 2013, 6:38pm Subject: Portafilter Temperature Gauge Aluminum or Paper towels?
I just upgraded to an Andreja and wanted to figure out the flush cycle on my machine to best bring the group head to 201 degrees. I saw a video where a guy connected a $13 temperature gauge's wire through the inside of the portafilter then stuffed it with paper towels to "hold" the water in place longer. I also read somewhere else that it's better to fill the makeshift temperature gauge portafilter with Aluminum foil. What do you guys think?
Do you know any other ways to accurately measure the temperature of the group head for under $30?
The crinkled aluminum foil actually works ok but is messy. It traps air in the crinkles and has little thermal mass. The inexpensive digital thermometers are thermistor based and have to be isolated from the water, where some put k thermocouples directly in the water. You may well use/lose a basket in the process. You can get inexpensive k thermocouples from ebay and use them "over the lip" of the basket/pf. Of course you need a reader, but those are very cheap and inexpensive on ebay and other sources.
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