Product Details
The Simplex 4098-9750 in-duct sensor housing mounts a Simplex TrueAlarm analog photoelectric sensor directly in HVAC duct airflow for applications where sampling-tube duct detectors are not appropriate. It supports duct air velocity up to 4000 ft/min and communicates to the fire alarm control panel over two-wire TrueAlarm IDNet or MAPNET II, with a clear cover and an in-housing red status LED for quick visual indication.
Key Specifications:
Type: TrueAlarm in-duct sensor housing (two-wire, no relay output)
Core Function(s): Houses a spot-type TrueAlarm photoelectric smoke sensor for duct smoke detection notification
Loop/Protocol: TrueAlarm analog communications; IDNet or MAPNET II (auto-selected), 1 address per housing
Power: Two-wire operation via IDNet/MAPNET II communications
Indicators/UI: Red LED in housing (pulsing = power-on; steady = alarm/trouble per panel indication)
Compatible Accessories:
4098-9714 – TrueAlarm analog photoelectric sensor head (required, ordered separately)
733-868 – Internal ribbon cable used inside the housing to connect the duct detector card to the head base (service/repair part)
2098-9806 – Remote test station with key switch and remote red LED
2098-9808 – Remote LED alarm indicator
4098-9819 – Adapter for 6 in round duct
4098-9824 – Adapter for 8 in round duct
4098-9852 – Adapter for 10 in round duct
4098-9853 – Adapter for 12 in round duct
System Compatibility: Compatible with Simplex control panels that support TrueAlarm IDNet or MAPNET II communications (MAPNET II when configured for TrueAlarm).