The main application areas: z used in pipes, tunnels, manholes and other environmental overhead accurately identify distal single fiber optic cable; room building z communications operators and line transformation, cable cutover, standardized management, resource survey, duty maintenance and so on. Coherent demodulation of the light through the fiber optic cable to the vibration signal into the visual and audio signals of various cable survey instrument, to accurately locate and identify the laying of the pipeline (manhole), tunnels and other environmental objective pole aerial cable. When using the cable survey instrument, engineers only need to gently tap the cable, you can easily recognize the need to find the target cable. How cable tester sample survey, Xin Hao Yuan (certified), cable survey instrument provided by the Tianjin Xin Hao Yuan Science and Technology Development Co., Ltd. Tianjin Xin Hao Yuan Science and Technology Development Co., Ltd. (tjaic.gov.cn/shownews.asp?id=5921) is Tianjin, special instrumentation leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness , and satisfy customer needs. Xin Hao Yuan in leadership with the staff warmly welcome all inquiries negotiations to create a better future Xin Hao Yuan.