Universal Bifilar Sundial
Until further notice, NASS Shop items cannot be sold or shipped to addresses in the EU.
The bifilar sundial was invented by Hugo Michnik in 1922 using two orthogonal wires suspended above the dial surface. Where the shadow of the wires cross, tells you the time. The NASS 3D printed version is 5 in (130mm) by 8 1/4 in (210mm) with adjustable gnomon for any latitude.
⚠ NOT A TOY -- NOT FOR CHILDREN UNDER AGE 14 ⚠ CHOKING HAZARD -- SMALL PARTS. NOT FOR CHILDREN.
The NASS 3D printed version of this dial adds features to make this truly universal sundial able to tell precise civil time. The height of the horizonal wire can be adjusted for the user's latitude and unlike other sundials, the hour lines are uniformly separated by exactly 15°, allowing the dial to be rotated for both longitude and Equation of Time corrections.. The result is a sundial that tells accurate civil time. The dial is 3D printed of marble or gray PLA filament, and shipped in a USPS Flat Rate Priority Box. Some assembly required using a Phillips screwdriver.