Coffee Data Science
iDroprep Tamper for Espresso
Data from Timon Kaufmann
The iDroprep tamper is a new type of tamper which uses a gel-like pad to modify how the tamp impacts the grounds. Timon Kaufmann made a video and collected some data on the tamper performance across a few shots (if you don’t speak German, turn on auto-closed captions translated to English). He presented the data in a table, so I pulled the data and graphed it to get a different look.
Here is the original data:
He collected Extraction Yield (EY) which measures how much coffee was extracted. It is the current best metric to determine method efficiency.
He did two variants for each tamper:
- Best puck preparation
- Basic puck preparation
Here are the three shots for each variant:
This gives a good story, but in the more general case, we can plot all the data against each other for each tamper. I did this and sorted the samples. The gap in performance is quite clear, but the amount of data is a poor sample size for a statistical test.
Additionally, I plotted shot time, but the shot times closely matched, so it wasn’t too revealing.
I always hope new technology has data associated to show performance. This is a small sample data, but small data is better than no data. I’m interested to see what other data comes along for this tamper and the puck preparation. It is quite possible a different puck preparation would better maximize the use of the iDroprep tamper.
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