The Honeywell Intellisense DT-450T is a 50'x40' Form A Passive Infrared Detector in the DT-400T series.

The IntelliSense DUAL TEC DT-400T series motion sensors have been paid the highest compliment possible by being the most copied motion sensor in the world. Based on microwave/PIR technology, the DT-400T series' patented microwave activation circuit provides superior catch performance and virtually eliminates false alarms. For years many manufacturers did not believe that dual technology is the wave of the future. Today, almost all major manufacturers of motion sensors in the security industry have introduced products to directly compete with the industry standard DT-400T series. The DT-400T series motion sensors provide cost-effective, proven performance, and are found in applications from homes to palaces around the world