Cracked or broken smartwatch sensor?
A crack in the optical sensor often looks cosmetic — until waterproofing fails, moisture gets in and heart rate drops out. Sensor CrashFix covers the damage, reseals and brings the watch back into daily use.
A crack in the optical sensor often looks cosmetic — until waterproofing fails, moisture gets in and heart rate drops out. Sensor CrashFix covers the damage, reseals and brings the watch back into daily use.
The sensor glass on the back of the watch seals the case and passes light for optical HR. When it cracks or breaks:
Water, sweat and moisture get in — the watch is no longer water-resistant as before.
Heart rate, SpO₂ and wrist detection fail or drop mid-workout.
Without a cover, impacts and dirt widen the crack and expose the module.
It is an adhesive optical cover that goes on top of the cracked or broken sensor glass. No opening the watch, no module swap. In many cases it:
Designed for the rear optical sensor on major smartwatches and bands. Check size on the product page before you buy — the right fit is what restores the seal.
Best when the sensor glass is cracked or broken and the watch still powers on. If the internal module is dead (no LEDs, board damage), a lens will not replace hardware repair. For most cracked-glass cases with failing HR, it is the simplest step before an expensive module swap.
Often yes — but without a proper seal and with unstable readings. The lens covers the damage so daily use is safer again.
Cracked means a fissure in the glass. Broken may mean missing pieces or shattered glass. The lens can cover the sensor area if there is still a surface to adhere to.
It reseals the sensor zone. It is not a factory IP rating — the goal is to seal the damage for normal use (hands, sweat, light rain).
Usually not for cracked glass. CrashFix is a cover — far cheaper than parts plus labour.