5th
DIY portafilter pressure gauge
The idea of this is from a thread on Home-Barista that is often cited in topics about brew pressure, yet I’m too lazy to find it.
While i was waiting for the gauge to come, I tried to estimate and adjust the OPV without one (using blind filter, measure ml/s from valve on my digital scale, convert units). Turns out i got pretty close to the 9 Bar that way.. :) I use my scale for EVERYTHING now, but i wish it was accurate to a tenth of a gram and not just whole grams.
This has a bleed valve that you adjust to something like 2oz in 25s in order simulate a typical shot. Not the same dynamics as with actual coffee, but more accurate than nothing (otherwise would be expected to be something like 1 to 1.5 Bar higher). The photo of the gauge in action was after the actual measurement, just opened a little for the picture, and not the actual brew pressure.. but kinda close anyway.
Note: Dog does not measure pressure. Photo included just because Marta is mad that I don’t post pictures of him.
