2-Wire Smoke Detector w/ Built-In Heat Sensor

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429AT - 2-Wire Smoke Detector w/ Built-In Heat Sensor
Brand: Interlogix
Part Number: 429AT

Availability: This product has been discontinued.




TheInterlogix 429 series self-diagnostic, 2-wire smoke detectors continually monitor their own sensitivity and operational status, and provide a visual trouble indication if they drift out of sensitivity range or fail internal diagnostics. The 429 series is easily cleaned by replacing the proprietary fieldreplaceable optical chamber. All models are designed to reduce false alarms from dust, insects, RFI and external light. An integral combination rate-of-rise and fixed 135deg.F (57deg.C), 50-foot rated, heat sensor is available with all "T" model detectors. An integrated silicon heat sensor and a dedicated microprocessor are used to detect heat and perform the rate of rise calculations.

Standard Features:

  • Intelligent self-diagnostics
  • Field-replaceable optical chamber
  • Low-profile design
  • Plug-in terminal block
  • Advanced false alarm immunity
  • Meets NFPA 72 field sensitivity testing requirements without the need for external meters

Additional Info

Additional Info

Part Number 429AT
What's in the box (1) 2-Wire Smoke Detector w/ Built-In Heat Sensor
Variant N/A


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Product Smoke Detector, 400 Series Photoelectric, 2-Wire, Heat, 6/12VDC, UL
2-wire compatibility S09A
Alarm Current Consumption[Nominal] 60.0 mA
Detector Head Depth[Nominal] 1.85 in
Detector Head Diameter[Nominal] 6.1 in
Field Wiring Size[Minimum] 14.0 AWG
Field Wiring Size[Maximum] 24.0 AWG
Heat Detection Specifications - Fixed[Nominal] 135.0 °F
Heat Detection Specifications - Rate of Rise >105°F and Rate of Rise 15°F/min
Height[Nominal] 1.85 in
Maximum Ripple[Maximum] 10.0 %
Operating Humidity[Minimum] 0.0 % RH
Operating Humidity[Maximum] 95.0 % RH
Operating Temperature[Minimum] 32.0 °F
Operating Temperature[Maximum] 120.0 °F
Operating Voltage[Minimum] 6.5 V
Operating Voltage[Maximum] 20.0 V
Packaging Basis[Nominal] 10.0 per carton
Regulatory Approval UL 268, FM, CSFM, MEA