Windows sensory security detectors small size, light weight.

门窗感应防盗报警器体积小，重量轻。

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In the area of electronic security detectors, passive infrared detector is widely used because of their low cost, technical performance and stability of by users and professionals welcome.

在电子防盗探测器领域，被动红外探测器的应用非常广泛，因其价格低廉、技术性能稳定而受到广大用户和专业人士的欢迎。

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A web of security cameras, metal detectors, beam sensors and bullet-proof screens will reinforce security in the three-storey, 3, 000 square-metre building.

在这座三层楼高、3000多平米的建筑中，监视系统、金属探测器、光束传感器和防弹屏构成了一个网络，加强安全保卫。

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That may sound a rather haphazard approach to network security, as detectors are randomly generated and die out from time to time.

ECONOMIST: A thousand ills require a thousand cures

They had to make their way through tight security, including metal detectors and bomb-sniffing dogs.

NPR: Boston Bomb Investigation Extends To Russia

They made their way through tight security, including metal detectors and bomb-sniffing dogs.

BBC: Boston bombs: Memorial for slain officer Sean Collier