This three zone processor is capable of monitoring twelve (12) ENHP Pulsors, twelve (12) HPP Pulsors or three (3) P5050 Sure Action Driveway Sensors simultaneously! You are even able to combine driveway sensors and pulsors with this device, for example use the pulsors on zones 1 and 2 and use the driveway probe on zone 3. The options are endless!
Note: Lightning can cause probe to trip if using either a SU-313 or SU-111 processor. A lightning check probe can be wired into the SU-212 processor to minimize accidental firing of the system due to lightning.