Very interesting! It would be nice to measure not only a single value but pressure dependence of the boiling point. According to https://gas-servei.com/shop/docs/technic...servei.pdf just with a velo pump one can go from -25°C to 0°C for the 1,1-Difluoroethane (R152a) for example. Arduino Nano 33 BLE Sense can be used for pressure measurements.
I am afraid only of this wikipedia warning : "Difluoroethane is an intoxicant and precipitates fatal cardiac arrhythmia...".
I am afraid only of this wikipedia warning : "Difluoroethane is an intoxicant and precipitates fatal cardiac arrhythmia...".