Kidde KI-OSD Intelligent Multi-criteria Optical Smoke Detector

Key Features:

  • Patented multi-criteria optical smoke sensing technology
  • Wide 0.5 to 4.36 % /ft. (1.6 to 13.6 %/m) smoke obscuration
  • Uses existing wiring
  • Integrated nuisance rejection reducing unwanted alarms from general cooking
  • Listed under UL 268 7th edition
  • Automatic device mapping
  • Up to 250 total Kidde Intelligent Addresses per loop
  • Two levels of environmental compensation
  • Two levels of Dirty Detector Warning
  • Twenty Pre-Alarm settings
  • Five sensitivity settings
  • Non-volatile memory
  • Electronic addressing
  • Environmental compensation
  • Automatic Day/Night sensitivity adjustment
  • Bicolor (Green/Red) status LED
  • Standard, Relay, Fault Isolator, and Audible Mounting Bases
  • Sensor markings provide easy testing identification

Note: Some features described here may not be supported by all control systems. Check your control panel’s Installation and Operation Guide for details.

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The Kidde Intelligent Optica Series KI-OSD smoke detector brings advanced optical (photoelectric) sensing technology to a practical design that increases efficiency, saves installation time, cuts costs, and extends life safety and property protection capabilities. Continuous self-diagnostics ensure reliability over the long-haul, while environmental compensation helps reduce maintenance costs.

Like all Kidde Intelligent Optica Series detectors, the KI-OSD is an intelligent device that gathers analog information from multiple optical sensors, converting this data into digital signals. Utilizing dual optical wavelengths combined with multiple detection angles, the KI-OSD differentiates particles that are not representative of actual smoke. Particle data is input into digital filters which feed a series of ratios removing signal patterns that are typical of nuisance sources, thus reducing unwanted alarms. To make an alarm decision, the detector’s on-board microprocessor measures and analyzes all optical sensor readings and compares this information to preprogrammed settings.

The KI-OSD detects particles from a wide range of combustion sources and will trigger an alarm when smoke density in the chamber reaches preprogrammed level. Thanks to its high performance patented reflective response technology, the smoke sensor responds quickly and reliably to a wide range of fire types, including both fast and slow burning fires fueled by combustibles typically found in modern multi-use buildings.

The KI-OSD detector is only compatible with control panels using a Kidde Intelligent Loop controller.

Self-locking tab LED Indicator Kidde Intelligent Series detectors mount to North American 1-gang boxes, 3-1/2 inch or 4-inch octagon boxes, and to 4-inch square electrical boxes 1-1/2 inches (38 mm) deep. They mount to European BESA and 1-gang boxes with 60.3 mm fixing centers. See mounting base installation and wiring for more information.


Sensing and Reporting Technology
The microprocessor in each detector provides additional benefits – Self-diagnostics and History Log, Automatic Device Mapping, and Fast, Stable Communication.

Self-diagnostics and History Log – Each Kidde Intelligent Series detector constantly runs self-checks to provide important maintenance information. The results of the self-check are automatically updated and permanently stored in the detector’s non-volatile memory

Automatic Device Mapping – The loop controller learns where each device’s serial number address is installed relative to other devices on the circuit. The mapping feature provides supervision of each device’s installed location to prevent a detector from being reinstalled (after cleaning, etc.) in a different location from where it was originally.

Fast Stable Communication – On-board intelligence means less information needs to be sent between the detector and the loop controller. Other than regular supervisory polling response, the detector only needs to communicate with the loop controller when it has something new to report.


Testing & Maintenance
Each detector automatically identifies when it is dirty or defective and causes a “dirty detector” message. The detector’s sensitivity measurement can also be transmitted to the loop controller. A sensitivity report may be printed to satisfy NFPA sensitivity measurements, which must be conducted at the end of the first year and every two years thereafter. The user-friendly maintenance program shows the current state of each detector and other pertinent messages. Single detectors may be turned off temporarily from the control panel. Availability of maintenance features is dependent on the fire alarm system used.

Detector mounting bases have wiring terminals that are accessible from the “room-side” after mounting the base to the electrical box. The bases mount to North American 1-gang boxes and to 3½ inch or 4-inch octagon boxes, 1½ inches (38 mm) deep. They also mount to European BESA and 1-gang boxes with 60.3 mm fixing centers. The KI-SB4, KI-RB4, and KI-IB4 mount to North American 4-inch sq. electrical boxes in addition to the above boxes. They include the KI-TS4 Trim Skirt, which is used to cover the “mounting ears” on the base. The KI-ABST mounts to a 4-inch square box only.

Remote LED GSA-LED – The remote LED connects to the KI-SB or KI-SB4 Standard Base only. It features a North American size 1-gang plastic faceplate with a white finish and red alarm LED.

Remote LED GSA-LED – The remote LED connects to the KI-SB or KI-SB4 Standard Base only. It features a North American size 1-gang plastic faceplate with a white finish and red alarm LED.

SIGA-TS4 Trim Skirt – Supplied with 4-inch bases, it can also be ordered separately to use with the other bases to help hide surface imperfections not covered by the smaller bases.

Sounder Bases – Kidde Intelligent Series sounder bases are designed for use where localized or group alarm signaling is required.

  • KI-ABST bases provide sounder capability to Kidde Intelligent Series to heat and smoke detectors. They are not intended for use with combination carbon monoxide detectors in Fireplus-CO mode.
  • KI-ABDT bases provide sounder capability to Kidde Intelligent Series smoke and heat detectors, as well as carbon monoxide detectors when used with a GSA-T3T4 Temporal Pattern Generator.
  • KI-ABLT bases provide 520 Hz low frequency sounder capability to Kidde Intelligent Series smoke and heat detectors, as well as carbon monoxide detectors when used with a GSA-T3T4 Temporal Pattern Generator. The KIABLT is suitable for applications requiring low frequency audible tones.


Typical Wiring
The detector mounting bases accept #18 AWG (0.75mm2), #16 (1.0mm2), #14 AWG (1.5mm2), and #12 AWG (2.5mm²) wire sizes. Sizes #16 AWG (1.0mm2) and #18 AWG (0.75mm2) are preferred for ease of installation.

Standard Detector Base, KI-SB, KI-SB4
This is the basic mounting base for KIDDE Intelligent Series detectors. The GSA-LED Remote LED is supported by this Base.

Isolator Detector Base, KI-IB, KI-IB4
This base includes a built-in line fault isolator for use on Class A circuits. A detector must be installed for it to operate. The isolator base does not support the GSA-LED Remote LED.

The isolator operates as follows:

  • a short on the line causes all isolators to open within 23 msec.
  • at 10 msec intervals, beginning on one side of the Class A circuit nearest the loop controller, the isolators close to provide the next isolator down the line with power.
  • when the isolator next to the short closes, it reopens within 10 msec.

The process repeats beginning on the other side of the loop controller.

Relay Detector Base, KI-RB, KI-RB4
This base includes a relay. Normally Open or Normally Closed operation is selected during installation. The dry contact is rated for 1 amp (pilot duty) @ 30 Vdc. The relay’s position is supervised to avoid accidentally jarring it out of position. The KI-RB can be operated as a control relay if programmed to do so at the control panel. The relay base does not support the GSA-LED Remote LED.

Audible Sounder Bases, Fire Mode ABST, ABDT, ABLT sounder bases


Warnings & Cautions

  • This detector does not operate without electrical power. As fires frequently cause power interruption, discuss further safeguards with the local fire protection specialist.
  • This detector does not sense fires in areas where smoke cannot reach the detector. Smoke from fires in walls, roofs, or on the opposite side of closed doors may not reach the detector.

Technical Specifications

Operating voltage 15.20 to 19.95 VDC
Normal operating current 32 μA
Alarm current 45 μA
Smoke Sensitivity Range UL/ULC: 0.5 to 4.36 %/ft. (1.6 to 13.6 %/m) obscuration
Vibration level 10 to 35 Hz, with an amplitude of 0.01 in.
Air velocity 0 to 4,000 ft./min (0 to 20 m/s)
Wall mounting 12 in. (305 mm) max. from ceiling
Compatible bases See Ordering Information
Compatible detector testers Testifi re 1000, Testifi re 2000
Operating environment 32 to 120°F (0 to 49°C), 0 to 93% RH, noncondensing
Construction High Impact Engineering Polymer, White
Storage temperature -4 to 140°F (-20 to 60°C)
Environmental compensation Automatic
Agency Listings CAN/ULC-S529, UL 268-7, UL 268A, CSFM, FM
Weight 0.401 lbs
Dimensions 2.30 x 4.30 x 4.30 in
Manufacturer Carrier
Brand Kidde
Condition New
Type Detector
Style Plug-In
Construction Polymer
Detectable Medium Fire
Detection Method Photoelectric
Material Qualities High Impact Resistance
Programming Electronic
Protocol Intelligent Loop Controller
Test Method Testifire 1000, Testifire 2000