Strobilus

Read the humidity from a real pine cone

A pine cone hygrometer. Cone scales open as air dries and close when it is damp, a movement with no power or electronics. Sit a real cone in the cup against the back board and read how far its scales reach: past the WET marks, past the DRY marks, or in between.

Customize this model

Size (Base A): 130 × 70 × 150 mm
Shape: Rectangular
Walls: 3.0 mm
Volume: 87.1 cm³
Est. weight (PLA): 108 g
Parts to print: 1
Category: Science & education
Made by: Krypto
Built in: 60 steps

What’s in it

Rectangular, 130 × 70 × 150 mm, with 3.0 mm walls
Engraved text: “DRY”, “WET”
One more base built on (Base B)
Base B: round, Ø 34 mm, 22 mm tall (beside)

How to print it

Print upright.

Prints as shown on its floor, no supports.

Filament: at most about 108 g of PLA printed solid (roughly $2.16 at $20 per kg); normal infill uses less.

To get the files, open it in the generator and choose File › Download STL (one file per part) or Download 3MF (every part on one plate).

Questions

What size is the strobilus model?

The strobilus model measures 130 × 70 × 150 mm (width × depth × height). That is Base A; one more base is built on. You can change every size in the free SO3D.xyz generator before you download it.

Does it need supports?

No. Print upright. Prints as shown on its floor, no supports.

How much filament does it use?

At most about 108 g of PLA (87.1 cm³ printed solid), roughly $2.16 of filament at $20 per kg. Normal infill uses less.

Can I change it?

Yes. Open it in the SO3D.xyz generator (free, in your browser), change the size, walls, dividers, holes, text or anything else, then download it as STL or 3MF for your slicer.