Siemens OH921

DescriptionThe Photoelectric | Thermal (Heat) Detector (Model OH921) is an intelligent, addressable multi-criteria detector that incorporates optical and thermal sensors, and uses signals in a neural network to create an intelligent multi-criteria detector. The encompassing result is a detector that provides enhanced detection to a wide range of products of combustion.Model OH921 is UL 268 7th Ed. listed and incorporates advanced built-in isolation (optionally configurable), which greatly improves reliability, circuit integrity and provides advanced addressable fault finding.