The GRX-IRPS Partition Sensor uses an infrared transmitter/receiver pair to detect partition movement and, in conjunction with other Lutron products, coordinates lighting preset functions in areas such as partitioned meeting rooms or ballrooms. The GRX-IRPS may be used with GRAFIK Eye 3000 or 4000 systems, GRAFIK Eye QS, Energi Savr Node, or Quantum systems.