Presenting the Kamstrup Multical 403 Heat Meter - YouTube
MULTICAL® 403 - YouTube
Reading out Kamstrup Multical 402/403 with home-built optical head | Tim's blah blah blah
GitHub - golles/ha-kamstrup_403: Custom component that integrates the Kamstrup 403 heating system into Home Assistant. This component does also support a few other heating systems
multical 403
KAMSTRUP MULTICAL 403 TEMPERATURE CONTROLLER INSTALLATION AND USER MANUAL | ManualsLib
Miniguide til Kamstrup Multical 403 - Nyborg Forsyning