smoke sensor การใช้

• Phase one mode is activated by a corresponding smoke sensor or heat sensor in the building.
• The system, including video cameras, smoke sensors and metal detectors, was ordered after a 1966 robbery attempt by a man who hid overnight in a sarcophagus and tried to leave with more than 20 objects, including Tutankhamen's dagger.
• With studied nonchalance in his voice, the captain announced that the smoke sensor in the baggage hold had gone off . ( I later learned that the pop-boom was probably when the captain " fired the bottles " _ or set off the cargo hold fire extinguishers . ) Although we weren't in danger, he told us to leave all of our belongings and get out of the jet.