The OPB9000, under the OPTEK brand, is a reflective, CMOS logic output sensor with programmable sensitivity, output polarity, and drain select. Its distinguishing parameter is 25+ kilolux ambient light immunity along with a wide operating temperature range. The self-calibration feature avoids the need for constant recalibration as the LED ages. Temperature compensation and automatic gain control features enable it to reliably function in dynamic environmental conditions where consistent performance from sensor devices is critical. Response time of 6 µsec ensures high-speed detection for time-critical applications. Compared to standard analogue designs it can eliminate circuit complexity and reduce board space requirements by up to 80% with its fully integrated analogue front end and digital interface. It combines an infrared emitter and integrated logic sensor in a 4.0 x 2.2 x 1.5 mm surface-mount package.