“I do not want to send a message that smoke detectors do not work,” the ... costs $20 and up. They often must be hard-wired because they require more power than the ionization-style detector ...

ALTHOUGH the most common high-sensitivity detectors now in use for gas chromatography consist of either the flame 1 or the argon ionization device 2, such instruments cannot be used for the ...

They only work where you can hear them ... Smoke alarms, or at least ionization-based alarms with a tiny amount of radioactive americium, are very simple devices. Inside the alarm, there ...

Ionization smoke alarms use a battery and two metal plates ... No matter what kind of smoke alarms you buy, McKelvey says, make sure they work! Check to see they bear the mark of an independent ...