Simplex 4098-9755 TrueAlarm Duct Sensor Housing - This advanced sampling assembly provides reliable smoke detection within commercial HVAC ductwork by delivering consistent airflow to TrueAlarm sensors. - 100 feet per minute minimum air velocity - 4,000 feet per minute maximum air velocity - 0.5 percent per foot obscuration sensitivity range - 24V DC operating voltage - 8-inch standard sampling tube length included

Engineered for high-performance safety, the Simplex 4098-9755 improves upon legacy duct detection hardware by offering enhanced dust resistance and streamlined installation. While older models often required frequent maintenance due to debris accumulation, this current housing design facilitates easier sensor access and more reliable performance in demanding facility environments.

Optimized Sensing and Durability

The TrueAlarm technology integrated into this housing ensures precise monitoring by continuously adjusting for environmental changes, effectively reducing false alarms caused by dust or aging sensors. By maintaining a controlled sampling environment within the duct, the unit provides critical, real-time fire protection data to your central control panel, ensuring compliance with modern life-safety standards.