Simplex 4098-9688 – 2-wire duct smoke detector with relay

Simplex 4098-9688 Duct Smoke Detector

The Simplex 4098-9688 is a 2-wire duct smoke detector designed to monitor smoke in HVAC, AHU, and air conditioning duct systems. It helps detect early smoke spread through ventilation ducts, triggering alarms or interlocking controls to limit fire spread in the building.

The product includes a built-in duct housing and output relay, allowing direct connection to the Simplex conventional fire alarm panel as well as peripheral devices such as fans, dampers, or building control systems. With its 2-wire configuration, the 4098-9688 simplifies wiring, optimizing installation and maintenance costs.

The device is suitable for a wide range of buildings such as office buildings, shopping malls, hotels, hospitals, and industrial plants.

Key Features

• Detects smoke in HVAC ductwork, preventing fire spread through ventilation systems
• 2-wire configuration, transmitting power and signal on the same line
• Integrated output relay, supports interlocking with fans, dampers, and BMS
• Dedicated duct housing, robust design, easy installation
• Stable operation in forced air environments
• Compatible with Simplex conventional fire alarm panels
• UL Listed, meets fire safety standards

Technical Specifications

• Model: Simplex 4098-9688
• Device Type: 2-wire duct smoke detector
• Wiring Configuration: 2-wire
• Function: Detects smoke in HVAC duct systems
• Integrated Relay: Yes
• Housing: Yes, included with the device
• Power Supply: 24 VDC (via the fire alarm panel's IDC circuit)
• Signal Output: Relay + fire alarm signal to the control panel
• Standard: UL Listed
• Operating Temperature: 0°C to 49°C
• Humidity: Maximum 93% RH, non-condensing
• HVAC, AHU, technical rooms, commercial buildings, factories