Edwards SIGA-OSHD Smoke and Heat Detector

The Edwards SIGA-OSHD Smoke and Heat Detector brings advanced optical 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. Also, the SIGA-OSHD provides an optical smoke sensor and a rate-of-rise heat sensor with a fixed temperature setting. Together these sensors efficiently detect smoldering fires, as well as fast flaming fires.

The Edwards SIGA-OSHD Smoke and Heat Detector 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 SIGA-OSHD 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.

Additionally, 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. Some of the standards features we can describe below, for example:

• Multi-criteria optical smoke sensing technology.
• Integrates optical smoke with rate-of-rise heat sensing.
• Uses existing wiring.
• Automatic device mapping.
• Sensor Markings Provide Easy Testing Identification.
• Two levels of environmental compensation.
• Electronic addressing.
• Bicolor (green/red) status LED.