There are a few circumstances where Infogrid recommends a custom offset.
This is s a non exhaustive list:
Any pipe material that is not copper pipe
Sensor which is installed more than 5 meters from the outlet.
Environments with a shift in ambient temperature of more than 15℃ (59℉) within a 2 hours e.g. fluctuating between 10℃ (50℉) and 25℃ (77℉) on a regular basis.
Water temperatures exceeding 70℃ (158℉)