Will other third party wireless sensors cross communicate or interfere with Parker SensoNODE Gold sensors?

Third party sensors will not cross-communicated.

The 900MHz ISM band is quite wide (~902 to 928MHz) and we are only using one narrow channel of it. The default channel is at 908.8693MHz, we have other settings for 902.9898MHz and 914.7488MHz if there could be an issue.

If they were using the *exact* same channel, then they would have to be using the same modulation scheme as us. If that is all true, then they would have to have *our* network keys on their gateways and sensors -- that's why we have that joining process at network commissioning. Joining bonds that sensor to that PRN and they then ignore everything that has not completed the joining process.

If they are using the same channel/frequency but nothing else is aligned, they could interfere with our transmissions if they occurred at the exact same time. Our radio turns on and checks to see if the channel is clear before transmitting. If it is occupied, it waits and tries again later, so the banner transmission would have to start within very narrow window (few uS) or else be broadcasting so often that the channel was not clear for this to disrupt communications significantly.