The series 300 range of detectors has been produced using the latest in manufacturing and design techniques, pushing out the boundaries of existing conventional detector technology. With its multitude of innovative features, the series 300 is a detector which acts conventionally, thinks intelligently. Series 300 is the paradigm shift in conventional fire detector technology. This new range is the first to benefit from our latest innovation-remote test and configuration capability from the ground using a handheld test. Series 300 is feature rich, including sensitivity selection, addressability, and status indication using a bi-color led. Service and maintenance is also simplified because the contamination level of the serving chamber can be read maintenance dates can be written and an alarm test can be instigated - all through use of the same hand-held tool. Automatic drift compensation dust tolerant chamber provides optimum detection performance and minimal nuisance alarms between maintenance visits multi-function, hand-held remote programming and test tool programmable sensitivity via a hand-held tool digital addressing capability, advanced maintenance features are implemented via a hand-held tool, reducing on-site time read and write last maintenance date read chamber contamination level read thermal element value alarm test selectable blink/noblink led option via hand-held tool automatic alarm test via hand-held tool photoelectric, multi-criteria photo-thermal, fixed and rate of rise thermal detectors backward compatibility with series 100 bases enables upgrade, extension and maintenance of existing installations 8 to 30vdc operating range enables operation in both fire and security systems 30 to +70c operating temperature range multi-function alarm normal bi-colour led indicator en54 (2000) part.