Hygrometer spool-mount

Four (5) ways to mount a hygrometer/temperature sensor onto a filament spool. I bought the meters from eBay to monitor the humidity of my spools in storage.

The first is just a connected pair of cylinders, one to fit into the spool hole and the other to put the meter into. Useful where the spool hole is smaller than the meter.

The second is a 'claw' version of the same, to provide a little springiness but mainly because some of my spools have an 'outer' hole with spokes to the inner hole