Description

The Siemens OH921 Photoelectric Smoke Detector incorporate both optical and thermal sensors, and use signals in a neural network to create an intelligent multi-criteria detector. The encompass result is a detector that provides enhance detection to a wide range of products of combustion. Model OH921 utilizes advanced multi-criteria detection technology.

In effect, the smoke chamber is design to manage light dissipation and extraneous reflections from dust particles or another non-smoker, airborne contaminants in such a way as to maintain stable, consistent detector operation. When smoke enters the light emit from the IRLED is scatter by the smoke and is receive by the photodiode. Model OH921 Siemens also utilizes a modern, accurate, and shock-resistant thermistor to sense temperature changes.

Each Siemens OH921 Photoelectric Smoke Detector has microcomputer-chip technology and highly stable, solid-state electronic circuitry. Model OH921 detectors utilize a modern, accurate, and shock-resistant thermistor to sense temperature changes. Model OH921 detector provides three (3) pre-program parameter sets that can be select by the FACP. Can compare these signals to those of deceptive phenomena that cause other detectors to trigger a false alarm.

Also, under normal conditions, light transmit by the LED is direct away from the photodiode and scatters through the smoke chamber in a control pattern.