This is a new product we're developing, which combines our upcoming “Half Decent Scale” with an engineer portafilter basket that holds a digital pressure and digital temperature sensor in it. You can thus see the real temperature, pressure and gravimetric (scale) flow rate.
In this video, we've hooked up a 3rd party digital pressure sensor, to test and calibrate our device against.
Eventually, this will replace our Scace device. As well as being much lighter (and so needing much less heating, and thus testing temperature more accurately.) the output is digital (via USBC, bluetooth and wifi) and thus can be sent to a computer.
We'd like to use it to have fully automated testing and calibration of our espresso machines. However, anyone who uses a Scace device (which is to say, everyone who builds or repairs espresso machines) will have a need for this. It will also let you precisely calibrate several espresso machines to each other.