The CIT-1, GIT-1 & SIT-6E sensors are used with the newer APS-C series controllers, EUR-5A controller and the upcoming PRO series controllers. These controllers supply the sensor 24VDC on the sensors red and black wires (black is ground).
They also work on the APS-3A, APS-3B and the APS-4 controllers although they are supplied with 24VAC on these controllers
