Aspiration System Sensor

An aspirating System Sensor is a company of St. Charles, Illinois, dedicated to the research, development and manufacture of fire protection equipment.
An aspirating smoke detector (ASD) is a system used in active fire protection, consisting of a central detection unit which draws air through a network of pipes to detect smoke.[1] 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.

Aspiration Sensing series is a line of aspirating smoke detectors that draw air into a patented, high-sensitivity smoke-sensing chamber through a pipe network.Aspiration Sensing Technology® series is a line of aspirating smoke detectors that draw air into a patented, high-sensitivity smoke-sensing chamber through a pipe network.The sampling pipe network, which collects air through sampling holesand transports it from the protected space to the detector, where it’s te sted for the presence of smoke particulate
An aspirating detection system’s sensitivity is dependent on two main factors: the number of sampling holes drilled in the piping network and the programmable smoke detection thresholds. The number of sampling holes can affect the dilution of the air returning to the sensing chamber.

An aspirating smoke detector constituted of:

A sensing chamber with a high sensitivity sensor to detect smoke particles suspended in air

An aspirator or fan to draw air from the protected area to the sensing chamber

An optional filter to remove all large particles that may damage the sensor within the sensing chamber