The Optex OA-FlexT Door Sensor for Slide or Swing Doors features whole presence detection capability for more safety and reliability. The OA-Flex T also features BlueZone technology and monitoring capability. The OA-Flex T has built-in monitoring capability. The sensor monitors all of its critical functions and notifies compatible controls if an error occurs. Self-monitoring capability ensures a higher level of performance over the life of the sensor.