Garmin Fenix 7X pro sensor cover/heart rate blocker (26mm Quickfit)

A simple physical cover for Garmin’s optical wrist sensor.

I designed this because disabling the wrist heart-rate sensor in the watch settings was not ideal for my use case.

I mainly use the cover during periods when the watch’s stress readings do not match how I actually feel—for example, while the ADHD medication is active.

Version 1 – "simple"

The simpler and more flexible version.
-It fits: the original Garmin QuickFit strap
-compatible QuickFit straps
-many nylon straps with QuickFit connectors

Version 2 – "more tight"

A more tight version designed around a "ZoRoll 26 mm nylon strap" with QuickFit connectors.

It also fits the original Garmin strap, but the fit is very tight. Long-term use with thicker straps may place additional stress on the printed clips and could eventually cause them to break (unsure :D ).

Print settings

Important:
Black filament and the relatively high number of walls and solid layers are very important!!!
(The part must block the green light from the optical sensor completely)

• Filament: Black (!!!!)

• Walls: ~ >7 (!!!!)

• Top layers: ~8 (!!!!)

• Bottom layers: ~8 (!!!!)
  

• Layer height: 0.10 mm

• Infill: 5–15% Gyroid (doesn't really matter because of the many solid layers)

• Supports: No

!!! Attention !!! : 

Thin walls, sparse solid layers or translucent filament will allow enough light through for the watch to continue detecting a pulse. 

Installation

Look for the "L" on the print - this is the left side. Clip the cover between the watch and the QuickFit strap so that the closed circular area sits directly underneath the optical sensor. The bracelets must point horizontally upwards while snapping the cover in.

Optional:

Use a little bit UHU Pattafix (or something similar) to better secure the cover.