motionless waterbed mattress as Some smoke detectors more effective than others

To start the test, we set a mattress on fire. Before long, smoke began to billow. 'That baby is putting off some serious smoke,' Richey said. 'Enough that it chokes you up in there, and neither one of them are going off.'

One minute and 23 seconds after the smoke began the photoelectric detector went off. But nothing from the one with the ionization sensor -- the one most commonly used
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