The Honeywell HOA0708/0709 series is a reflective sensor comprised of an infrared emitting diode and either a phototransistor (HOA0708-001, -011) or photodarlington (HOA0709-001, -011). Encased in a black thermoplastic housing, this sensor responds to radiation from the IRED when a reflective object is within its field of view. It includes an ambient light filter to minimize interference and is commonly used in industrial automation, security systems, and object detection applications. The housing material is polycarbonate and is soluble in chlorinated hydrocarbons and ketones. Cleaning with methanol or isopropanol is recommended.