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Fire alarm
Nov 25, 2016

Ion sensing smoke

Fire alarm detection alarm works: smoke is rising, reach under the ceiling. Smoke feeling alarm apparatus through smoke discovery fire. You see no flames or smell smoke when smoke already knows. It keeps working 365 days a year, 24 hours a day without interruption. In alarm, its howling cacophony of sound, until the smoke cleared.

Ion sensor is determined by measuring the balance of positive and negative charges to work in the air. Inside the sensor, there is a small piece of radioactive material, which induced flow produces a small current in the air. On the circuit board, there is a computer chip used to monitor the current. When smoke particles into sensing room, would upset the balance of positive and negative charges, but also bring about changes in the current. When the smoke has gradually increased, imbalance of positive and negative charges will increase. When the balance reaches a certain limit, Bell will ring.

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