An old school rain-gauge.

This design is an easily printable with no reworking and only one part needing minimal supports. 

I modified the original design a bit. The connection has become mor roust.

The scale is in l/m² or mm (wich is essentially the same :) )

• Total Dimensions: 230mm x 80mm (Minimum 190mm Print Hight needed)

Despite the look on the photo, the cylinder is actually quite transparent and it is easy to see the waterlevel inside.

Print Settings:

1) Cylinder ~ 2.5h
Transparent PLA
0.2 mm layer thickness
Vase-Mode ("Spiralise Outer Contour" in Cura)
6 bottom layer to make it waterproof
Printed with Raft

• mine became perfectly waterproof using this method

2) Outer shell with mount for an 8mm rod ~9h
PLA
0.2 mm layer thickness
30% Infill
no Supports needed
Printed with Raft

3) Funnel ~3.5h
PLA
0.2 mm layer thickness
30% Infill
Supports (for angles >60% --- Needed only for the fastening-rod on the side)
Printed with Rafts