System Sensor 2D51 Intelligent Plug-In Duct Detector

Overview

The System Sensor 2D51 InnovairFlex is an addressable intelligent duct detector designed for integration into fire detection and alarm systems. This plug-in detector monitors air handling ducts for smoke detection, delivering addressable communication capability for precise system identification and diagnostics. The compact form factor accommodates standard duct installations while maintaining reliable detection performance.

Compatibility

Operates on 29VDC and communicates via addressable protocol, making it compatible with fire alarm control panels and intelligent detection networks that support addressable device communication. Suitable for HVAC duct applications in commercial and institutional buildings where early smoke detection in air distribution systems is required.

Specifications

Dimensions: 14.38 in L × 5 in W × 2.5 in D

Weight: 2.5 lbs

Voltage: 29VDC

Communication: Addressable

System Sensor DST3 InnovairFlex Sampling Tube - 2 to 4 Foot Duct

Duct sampling tube for 2–4 ft runs, TCP/IP integrated, 29VDC

Covers 2–4 ft duct runs at 29VDC, eliminating extra detector heads per zone.
Supports air velocities 100–4,000 ft/min, matching standard commercial HVAC ranges.
Tool-free front or back install via ¾-in conduit knockout cuts deployment time.

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System Sensor

SKU: DST10

System Sensor DST10 InnovairFlex Sampling Tube - 8 to 12 Foot Duct

Aspirating smoke sampling tube for 8–12 ft ductwork runs with TCP/IP

Covers 8–12 ft duct spans, fitting medium-run HVAC zones without custom hardware.
TCP/IP communication integrates directly into networked InnovairFlex detection systems.
Compact 14.38 × 5 × 2.5 in rectangular form installs in tight ductwork with minimal clearance.

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System Sensor

SKU: DST1

System Sensor DST1 InnovairFlex Sampling Tube - Up to 1 Foot Duct

Duct sampling tube for InnovairFlex fire detection up to 1 foot

Samples duct airflow from 100–4,000 FPM, covering low-velocity returns to high-velocity supply runs.
Tool-free front or rear installation via patented quick-connect; no threaded fittings required.
Operates at 29VDC and integrates directly into 4-wire photoelectric fire alarm circuits.

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System Sensor

SKU: DST5

System Sensor DST5 InnovairFlex Sampling Tube - 4 to 8 Foot Duct

4-to-8-foot duct sampling tube for networked HVAC fire detection

Adjusts from 4 to 8 feet to cover variable duct widths without replacing hardware.
Tool-free snap-in mount to D4120 housing cuts installation time in tight duct access.
Supports air velocities from 100–4,000 FPM across –4°F to 158°F operating range.

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System Sensor

SKU: RA100Z

System Sensor RA100Z Remote Annunciator for Duct Detectors

TCP/IP remote annunciator for System Sensor duct detection systems

TCP/IP connectivity eliminates dedicated alarm wiring runs to remote monitoring stations.
Runs on 29VDC, drawing directly from existing panel auxiliary outputs—no converter needed.
Compact 14.38×5×2.5 in. body supports wall, ceiling, or rack mounting in tight spaces.

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