Simplex 4098-9750 — TrueAlarm in-duct sensor housing, without relay.
Duct detection samples the air moving through an HVAC system so smoke can be detected in the airstream and the fans shut down before the system distributes it through the building. The housing carries the sampling tubes that draw conditioned air across the sensor head and return it to the duct.
- In-duct housing for TrueAlarm analog sensors, per NFPA 72 and NFPA 90A duct detector requirements
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No relay — specify the 4098-9751 where a relay is required in the housing
- Assembly includes sensor base assembly, mounting box and cover, and mounting gaskets
- UL air velocity rating 35 to 2,000 ft/min (10.7 to 610 m/min)
- Compatible with Simplex 4100ES, 4010ES, 4100U, 4010, 4020, 4100, 4120 and 2120 CDT panels configured for MAPNET II / TrueAlarm communications
The sensor head is ordered separately — the 4098-9714 smoke sensor is the usual companion. Sampling tube length must suit the duct width; check it against the duct dimensions before installation.
