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Google Nest Protect smoke + CO alarm (2nd gen)
What are the dimensions of the Nest Protect (2nd gen)? · Modern device · basis: Manufacturer specifications (Google)
Also called: Nest Protect (2nd gen) dimensions, Nest Protect (2nd gen) size, Nest Protect (2nd gen) size in mm, Nest Protect (2nd gen) size in inches, Nest Protect (2nd gen) measurements, how big is the Nest Protect (2nd gen), Nest Protect (2nd gen) weight, dimensiones Nest Protect (2nd gen), medidas Nest Protect (2nd gen), Nest Protect (2nd gen) Maße
Exact dimensions. True size, with no printing tolerance added.
- length
- 134 mm
- width
- 134 mm
- height
- 38.5 mm
Notes
- Google Nest Protect smoke + CO alarm (2nd gen) measures 134 × 134 × 38.5 mm (5.3 × 5.3 × 1.5 in) according to Google; height × width × depth of the alarm as published by Google (13.4 × 13.4 × 3.85 cm).
- Google lists one size for the 2nd gen alarm (battery entry); the wired model has no separate size entry.
- The file is a plain bounding box at the published size: the rounded-square body, centre button, light ring and mounting plate are not modelled.
- True size, no printing tolerance added. Only published numbers are used; anything not published is said so.
Google Nest Protect smoke + CO alarm size chart
| dimension | value |
|---|---|
| Height | 134 mm (5.3 in) |
| Width | 134 mm (5.3 in) |
| Depth | 38.5 mm (1.5 in) |
| Weight | 379 g (13.9 oz) battery model; 375 g (13.2 oz) wired model |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| Nest Protect technical specifications - Google Home and Nest Help | web | Publisher's page; dimensions are facts |
Free files
★ Free files 1 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json
| google-nest-protect-2nd-gen-envelope | Envelope 134 × 134 × 38.5 mm (height × width × depth of the alarm as published by Google (13.4 × 13.4 × 3.85 cm)) | STEP · STL |
https://xemstudio.com/mcp to Claude, ChatGPT, Cursor or any MCP client (free, no account, one minute) and it can look up exact sizes, mating fits and free STEP/STL from every chat.Plain text: sheet.txt · JSON: /api/geometry?object=google-nest-protect-2nd-gen
Fits with

Questions
How big is the Nest Protect (2nd gen)?
Height 134 mm, width 134 mm, depth 38.5 mm (5.3 × 5.3 × 1.5 in).
How much does the Nest Protect (2nd gen) weigh?
379 g (13.9 oz) battery model; 375 g (13.2 oz) wired model, per Google.