The Reacta 21C Sensor is an integrally mounted sensor for batten luminaire such as our Ecopak and Dexpax offering presence detection and Bi-Level Dimming, during periods of occupancy the luminaire will operate at 100% output and dim to 10% output during periods of absence. The Reacta 21C offers an adjustable time delay set via a turn dial on the sensor. Low time delays settings of 10 minutes or 30 minutes can be set via a jumper on the circuit board if required.