Asmoke detector(sometimes called a "smoke alarm") is a safety device that detects airbornesmokeand issues an audible alarm, thereby alerting nearby people to the danger offire. Most smoke detectors work either by optical detection or by ionization, but some of them use both detection methods to...
A. Smoke detector B. Smoke blower C. Smoke maker 相关知识点: 试题来源: 解析 A。解析:选项 A“Smoke detector”是烟雾探测器,可以检测到烟雾并发出警报;选项 B“Smoke blower”是烟雾吹风机;选项 C“Smoke maker”是烟雾制造器。反馈 收藏
The smoke detector of the present invention is designed to warn hearing impaired persons of fire or smoke. A small, attractive, and inexpensive wall or ceiling mounted unit houses a dual chamber ionization detector, piezoelectric alarm horn, and a high intensity xenon strobe unit producing approxima...
A smoke detector and alarm utilizing two photo resistors, one of which is used to detect smoke in an enclosed chamber and the other of which is used to compensate for line voltage variations and the effect of such variations on the smoke detecting photo resistor, and to supervise or monitor...
An interface unit interposed between a central alarm panel and a string of smoke detectors interconnected by a three-wire bus. Two wires of the bus carry AC power and the third wire is an interunit signalling wire. When an individual detector senses a smoke condition, it places a voltage on...
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Factory Smoke Alarm Detecor 24VDC Conventional Smoke Detector, Find Details and Price about Smoke Detector Lpcb Approve Smoke Detector from Factory Smoke Alarm Detecor 24VDC Conventional Smoke Detector - Shenzhen Asenware Test and Control Technology Co.,
The red LED on each detector provides a local 360° visible alarm indication. They flash once every minute, indicating that the power is on and the detector is working. When an alarm occurs, the red LED is on; when the battery is low, the red LED will flash and will...
It's a pretty big smoke detector. It is not very sensitive. There would have to be a LOT of smoke before the alarm would go off -- the smoke would have to be thick enough to completely block out the light. It takes quite a bit of smoke to do that. Photoelectric smoke detectors th...
Dsw508A /Dsw508b Smoke Alarm Detector Product Description Power source: DC 9V Static current:<6.5uA Alarm current:10mA Alarm volume: >85db(3m) Low voltage alarm:6.5V~7.5V Working temperature: -5ºC~+40ºC Detailed Photos Company Profile Established in 1998, DSW Audio & Sec...