As I understand it the LOS-CDT-500 sensors have an 8 minute grace period built into the sensors.
If used in conjunction with a keypad in the room this 8 minute period seems to be a bit of an issue.
For example you enter the room the sensor turns the light on, do what ever you need to do and then as you leave the room turn the light off from the keypad.
If someone else enters the room within the 8 minute period then the sensors does not activate and that person assumes the sensors is not functioning.
You can of course turn the light on from the keypad, but it does cause some confusion.
Are there any ways round this other than buy another sensor.