First off, here is a hygrometer you can use as a reference standard in your operations… it costs around $30. It is an eval board for the Sensirion SHT 40 sensor. VERY good performance, extremely fast response time, accurate to 1.8% error, and useful down to 0% RH. Really. At DigiKey, Part Number 1649-SHT4XSMARTGADGET-ND. https://www.digikey.com/en/products/detail/sensirion-ag/SHT4X-SMART-GADGET/14318392

I have these in the store!

(I am also playing with the Adafruit Feathers, and a Sensirion SHT45 as an attached sensor. More on this to come…)

The sensational Sensirion Hygrometer…

Click HERE for the STL file of the Bracket.

Here is the STL files for the Sensirion Housing TOP, and the BOTTOM.

I have these in the store!

A fast-change Bambu Spool Dessicant Cartridge…

Click HERE for the 3MF file for the Bambu Spool Dessicant Cartridge.

(Please note that this is a REMIX of a design by EnRiON, from the Printables.com site. Linked HERE.)

Spencer scaled up the original design from a 50mm diameter to a close fit (55mm) for the Bambu Reusable Spool. Importantly, the flange on the screw-in cap was removed and replaced with two snap-in features calibrated for the width of the Bambu Reusable Spool.

This is the indicating dessicant (silica gel) which we use and re-use: https://amzn.to/43MiQih

We store filament spools in these containers, with dessicant: Sterilite Ultra-Seal 4.7 Quart Bowl, Clear Lid & Base with Rocket Red Gasket, 4-Pack - https://amzn.to/3oRl15m