Comparison Sigma iD.GO vs Sigma PC 3.11

Body with special protection against moisture, taken to measure the IP index. The higher it is, the more waterproof the device. However, heart rate monitors, which are akin to wristwatches, are water resistant in most cases, measured in atmospheres (see the relevant paragraph). It is this parameter that to a greater extent describes the capabilities of the device in contact with water. Anyway, before using any waterproof model, you must carefully study the operating instructions specified by the manufacturer.

The degree of water protection provided for in the design of the device.

The specified underwater depth for device functionality is often given, but it's important to note that these values are somewhat arbitrary and don't accurately reflect real-world water resistance. The assessments only consider static pressure, neglecting dynamic pressure created by movement, including immersion.

Effectively, genuine water resistance can only be claimed at a minimum of 30m. Even then, such capabilities only withstand minor exposure like rain. Brief water exposure, like swimming, might be permitted at 50m (not universally). For depths of 2 — 3m, 100m is necessary, and serious diving requires a minimum of 200m (or 300m for depths exceeding 20m).