50km distributed optical fiber vibration sensing system

{"cid":"91225496","title":"Hanwei DF3050 Fiber Optic Vibration Detector","imgUrl":"https:\/\/img.chinax.com\/nimg\/a1\/65\/6a05c3ba676e1f379473b24e22e4-200x200-1.jpg","attrs":{"Price":"350$","Brand Name":"Hanwei","Model Number":"DF3050","Minimum Order Quantity":"1","Delivery Time":"1WEEK","Place of Origin":"CHINA","Payment Terms":"T\/T","Detection wavelength":"1550nm","Fiber type":"9\/125\u03bcm, single-mode","Measurement range":"\u2264 50km","Positioning accuracy":"\u00b11m\/\u00b15m\/\u00b110m","Response time":"< 2s","Operating temperature":"-10\u2103 to +45\u2103","Power supply":"220V AC \/ 12VDC","Power consumption":"\u2264 2W"}}