Edwards KI-OSHD Intelligent Multi-Criteria Smoke and Heat Detector

The Edwards KI-OSHD Intelligent Multi-Criteria Smoke and Heat Detector is an addressable life-safety detector that combines advanced optical smoke sensing with electronic heat detection. It is designed to detect both slow, smoldering fires and faster flaming fires while helping reduce nuisance alarms.

The KI-OSHD uses dual optical wavelengths, multiple detection angles, and onboard digital processing to distinguish actual smoke signatures from common nuisance particles. Its thermal sensor provides both 135°F fixed-temperature detection and 15°F-per-minute rate-of-rise detection.

Product Functions

• Provides intelligent addressable smoke and heat detection
• Uses multi-criteria optical smoke sensing
• Provides rate-of-rise heat detection
• Provides 135°F fixed-temperature detection
• Uses dual optical wavelengths
• Uses multiple detection angles
• Provides nuisance-alarm rejection
• Provides continuous self-diagnostics
• Provides environmental compensation
• Supports electronic addressing
• Supports automatic device mapping
• Provides five sensitivity settings
• Provides twenty pre-alarm settings
• Supports automatic day/night sensitivity adjustment
• Provides bi-color status LED indication

Multi-Criteria Smoke Detection

The KI-OSHD gathers analog information from multiple optical sensors and converts it into digital signals.

Its dual-wavelength optical system evaluates particles from multiple detection angles. The onboard microprocessor analyzes these readings using digital filtering to distinguish smoke associated with actual fires from particles associated with nuisance sources.

This technology is particularly useful for reducing unwanted alarms caused by general cooking particulates.

Smoke & Heat Detection

The KI-OSHD combines:

Optical Smoke Detection

135°F Fixed-Temperature Heat Detection

15°F/min Rate-of-Rise Heat Detection

Combining smoke and thermal information allows the detector to respond effectively to both smoldering and fast-flaming fire conditions.

Smoke Sensitivity

The published smoke sensitivity range is:

0.5–4.36%/ft obscuration

or

1.6–13.6%/m obscuration

The detector provides:

Five sensitivity settings

Twenty pre-alarm settings

These settings allow compatible control systems to adapt detector response to different applications.

Environmental Compensation

The KI-OSHD provides automatic environmental compensation to help maintain reliable detection as conditions change over time.

Features include:

Two levels of environmental compensation

Two dirty-detector warning levels

These functions help identify contamination and maintenance requirements before detector performance is significantly affected.

Electronic Addressing

The KI-OSHD uses electronic addressing rather than conventional mechanical address switches.

Compatible systems can support up to:

250 intelligent addresses per loop

The detector also supports automatic device mapping to simplify system commissioning and troubleshooting.

Status LED

The KI-OSHD incorporates a bi-color status LED:

Green

Red

The indicator provides local detector status information according to the connected control system.

Compatible Detector Bases

The KI-OSHD supports several compatible base configurations, including:

KI-SB / KI-SB4 — Standard bases

KI-RB / KI-RB4 — Relay bases

KI-IB / KI-IB4 — Isolator bases

Compatible audible bases are also available depending on the system configuration.

Electrical & Detection Information

Model: KI-OSHD

Device Type: Intelligent Multi-Criteria Smoke and Heat Detector

Smoke Detection: Multi-Criteria Optical

Heat Detection: Fixed Temperature / Rate-of-Rise

Fixed Temperature: 135°F

Rate-of-Rise: 15°F/min

Smoke Sensitivity: 0.5–4.36%/ft

Sensitivity Settings: Five

Pre-Alarm Settings: Twenty

Addressing: Electronic

Device Mapping: Automatic

Status Indicator: Green / Red LED

Base: Separately ordered

KI-OSHD Datasheet