Happy Chen

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So far Happy Chen has created 4 blog entries.

Ionic smoke detectors and photoelectric smoke detectors

The two most common smoke detection techniques are ionizing smoke detection and photoelectric smoke detection. Ionic smoke alarm : Smoke alarms are generally more responsive to burning fires. How it works: An ionizing smoke alarm puts a small amount of radioactive material between two charged metal plates, ionizing the air and allowing electricity to flow

By |2022-04-15T15:10:53+08:00March 19th, 2020|About|

Smoke box instruction manual

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By |2022-04-15T15:18:04+08:00December 7th, 2015|Operation Instruction, The standard interpretation|

UL217 Smoke box instruction manual

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Uropean standard and national standard difference

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By |2022-04-15T16:28:27+08:00December 6th, 2015|Operation Instruction, The standard interpretation|