Why is my Kromek ID app connected to another detector?

Head to the Kromek ID app settings

It is possible to connect different D3S or D3M detectors to one smartphone running the Kromek ID app. 

However, multiple detectors cannot be connected at the same time. To connect a different device, navigate to the Kromek ID app settings from the main menu. From there, select "Bluetooth Settings."

You will then see a list of possible detectors to connect. The detector shown with a check mark next to it is the currently selected.

To select another detector, simply select the new detector to be connected.