Smoke Detector

Product Details:

An Aspirating Smoke Detectors (ASD) is used in active fire protection, consisting of a central detection unit which draws air through a network of pipes to detect smoke. The sampling chamber is based on a nephelometer that detects the presence of smoke particles suspended in air by detecting the light scattered by them in the chamber. ASDs can typically detect smoke before it is visible to the naked eye.

Product Details:

Product Details:

The Signature Series SIGA-PHD detector brings advanced multisensor technology to a practical design that increases efficiency, saves installation time, cuts costs, and extends life safety and property protection capabilities. Continuous self-diagnostics ensures reliability over the long-haul, while environmental compensation helps reduce maintenance costs.

The SIGA-PHD provides an optical smoke sensor and a rateof-rise heat sensor with a fixed temperature setting. Together these sensors efficiently detect smoldering fires, as well as fast flaming fires.


Like all Signature Series detectors, the SIGA-PHD gathers analog information from its sensing elements and converts this data into digital signals. To make an alarm decision, the detector’s on-board microprocessor measures and analyzes smoke and heat sensor readings and compares this information to historical data. Digital filters remove signal patterns that are not typical of fires, thus virtually eliminating unwanted alarms.


Standard Features:

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

• Next Generation Detection Technology
• Integrates optical smoke with rate-of-rise heat sensing
• Wide 0.53 to 3.94 %/ft. (1.7 to 12.35 %/m) smoke obscuration
• Uses existing wiring
• Automatic device mapping
• Sensor Markings Provide Easy Testing Identification
• Up To 250 Total Signature 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

Product Details:

The Photoelectric Smoke Detector (Model OP921) uses state-of-the-art microcontroller circuitry and surface-mount technology for maximum reliability. Model OP921 incorporates an optical sensor using a light-scattering detection principle. The device utilizes advanced software algorithms to analyze the signals, and provides highly stable and accurate smoke detection.

Model OP921 also uses state-of-the-art microprocessor circuitry with error check; detector self-diagnostics, and supervision programs.

Field-Device Programmer / Test Unit:
Model OP921 is compatible with the Siemens field-device programmer / test unit (Model 8720 | DPU), which is a compact, portable and menu-driven accessory for electronically programming and testing these addressable detectors promptly and reliably. For instance, the field technician selects the accessory’s program mode, and enters the desired address.


Model DPU eliminates the need for cumbersome, unreliable mechanical programming methods (e.g. – dials and rotary switches), and reduces installation and service costs by electronically programming and testing the detector prior to installation. When set in `test’ mode, Model DPU will perform a series of diagnostic tests without altering the address or other stored data, allowing technicians to determine if the detector is operating properly.


Each field-device programmer / test unit operates on AC power or rechargeable batteries, providing flexibility and convenience in the programming / testing of fire-safety equipment from practically any location. Additionally, with the use of a Model DPU unit, there is no longer a cause for concern with any vibration, corrosion and other deteriorating conditions that can accompany the vitality of a mechanicaladdressing mechanism.

Product Details: