NOTE: This model replaces the System Sensor 2451. The 2451TH has been replaced by the 2WT-B or 4WT-B. Also note the 2451 is no longer listed for area protection.
The 100 Series is designed to meet the performance criteria designated by UL. Their sensing chambers are sealed against back pressure air flow, dirt, and insects. This chamber is protected by a fine mesh screen which can be cleaned or replaced. Additional key features include interchangeable ion and photo heads, a variety of mounting bases, and a full line of accessories.