Magnetic Keychain Level for Ubiquiti Bubble Vials - L-shaped, level + plumb

A pocket-size L-shaped spirit level that lives on your keychain.

Two tubular bubble vials: the horizontal one sits at the top of the bar, the vertical (plumb) one in the arm. Each vial can be read from the front, the back and its own edge window, so you can look from above when it rests on a surface, or from the side when it is held against a wall. Window edges are chamfered for a clearer view.

Three magnets sit right behind the reference edge, so it sticks to steel studs, frames, shelves and machines while you read it.

Size: 37.5 x 28 x 8 mm.

What you need

• 2 tubular bubble vials, 6 x 14 mm (the small vials that come with Ubiquiti mounts; mine measure 5.95 x 14.15 mm)

• 3 neodymium disc magnets, 6 x 2.5 mm

• 3 M2 x 5 self-tapping screws, flanged/button head (head 5 mm x 1.2 mm)

• a keyring or a screw-lock steel cable keyring (the tunnel is 4 mm, enough for the 3.3 mm threaded end)

Printing

• PETG (tested), 0.2 mm layers, at least 2 walls (the walls over the vials and magnets are 0.9 mm)

• Supports enabled: the finish is noticeably cleaner. Both halves print flat with the outer face on the bed; the 3MF is already oriented.

• I used PLA as the support interface with PETG (dual nozzle), so the supports pop off cleanly. On a single nozzle, plain PETG supports work too.

Assembly

1. Drop the 3 magnets into the half-pockets of the base along the reference edge (polarity does not matter).

2. Lay the 2 vials in their channels.

3. Close the cover (the tongue and groove align the halves) and tighten the 3 screws.

4. Pass the keyring through the tunnel in the corner of the bar.

Tips

• Use the long magnetic edge as the reference: on a surface for level, against a wall or post for plumb.