The Kidde Intelligent Optica Series KI-OSHCD smoke detector brings advanced optical (photoelectric) sensing technology to a practical design that increases effi ciency, saves installation time, cuts costs, and extends life safety and property protection capabilities. Continuous self-diagnostics ensure reliability over the long-haul, while environmental compensation helps reduce maintenance costs. The KI-OSHCD provides the best of all worlds with comprehensive life safety monitoring. The combination of optical smoke detection with rate-of-rise heat sensing technology provides effi cient identifi cation of smoldering fi res, as well as fast fl aming fi res. With the added element of CO monitoring, this detector pulls double duty: continually monitoring the environment for signs of fi re, as well as its invisible yet deadly companion— carbon monoxide. Like all Kidde Intelligent Optica Series detectors, the KI-OSHCD is an intelligent device that gathers analog information from multiple optical sensors, converting this data into digital signals. Utilizing dual optical wavelengths combined with multiple detection angles, the KI-OSHCD differentiates particles that are not representative of actual smoke. Particle data is input into digital fi lters which feed a series of ratios removing signal patterns that are typical of nuisance sources, thus reducing unwanted alarms. To make an alarm decision, the detector’s on-board microprocessor measures and analyzes all optical sensor readings and compares this information to preprogrammed settings. The detector also analyzes the smoke and heat sensors independently from the CO sensor to determine whether to initiate a fi re alarm, a life safety CO alarm, or both.