Firmware update 2.2 for Pro Max/Prime+/Pure (4th Gen) includes the following improvements:
- optical sensing is enhanced when using inefficient fibre optic cables,
- solves a rare issue with unresponsive mode dial and
- reduces the chances of a false leakage alarm in high moisture environments.
Includes firmware 4.2 for Pro X/Prime X (3rd Gen) and 4.5 for PRO/Prime (2nd Gen).