Syringe Funnel for Gas Pycnometry
This is a funnel designed to fit a 100 mL syringe on one end, and an espresso machine portafilter on the other. The funnel is used to transfer ground coffee between the two. This allows us to measure the volume of ground coffee using gas pycnometry, as described here:
https://quantitativecafe.com/2022/01/10/measuring-density-with-gas-pycnometry/