code: def high_limit(self) -> Optional[Union[int, float]]:
          
          return self._get_field_value(SpecialDevice.PROP_HIGH_LIMIT)
docs: High limit setting for a special sensor.
  
          For LS-10/LS-20 base units this is the alarm high limit.
          For LS-30 base units, this is either alarm OR control high limit,
          as indicated by special_status ControlAlarm bit flag.