One Scace basket that will drop into a bottomless portafilter and connect to a data logger;
http://www.espressoparts.com/EP_THERMOFILTER1?&search_id=2069605
We want to measure the temperature of both the supply and return thermosiphon pipe, the temperature at the back of the group where the thermosiphon enters, the temperature at the front of the group (to show the water jacket is full of water – it is a saturated group), the feed from the Scace, and a final sixth probe to record the ambient temperature as we go
So, we need three digital thermometers that each have two channels for thermocouples and a USB port to connect to a computer and critically a USB driver for OSX – something that is much rarer than I ever imagined
These thermometers are supplied with 2 K-type thermocouples with each meter
We have bought some thermal paste to ensure there is not an insulating layer of air between the probe and the surface of the group
And all held in place with a roll of this stuff
Hooked up to Artisan roasting software which is something we’ll have to teach ourselves how to operate