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美國 SonTek? ? ??
美國YSI集團成立于1948年，總部位于美國俄亥俄州，是目前世界上唯一一家同時掌握水質與流速流量測量技術的集團公司。作為國際上領先的水質、流速流量監測儀器制造商，以世界領先的傳感器技術為核心，不斷推出先進的水質和流量監測產品。YSI集團擁有YSI和SonTek兩大品牌，共四條主要的產品線：YSI水質分析儀、YSI多參數水質監測系統、SonTek/YSI聲學多普勒流速流量測量系統、YSI集成系統（前稱Endeco/YSI系統）。
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Founded in 1992 on the premise that precision water velocity measurement should be practical, affordable, and easy, SonTek/YSI today offers the widest variety of acoustic Doppler instrumentation on earth.

Since our invention of the Acoustic Doppler Velocimeter in 1993, our product line has grown into a diverse, multi-faceted mix of high technology instruments designed for a wide variety of applications. Put simply, our instruments tell you how fast the water is moving, where it is moving, and even if it is not moving at all. On top of that, just about all our products are offered with an array of ancillary sensors for complete environmental monitoring solutions.

Sold worldwide, our innovative instrumentation is designed on the basis of your requirements to fit the proper environment, measurement criteria, and budget. Our products could be as easily found in a university laboratory as they could in the deep ocean, along the coast, or in a river, lake, or stream. From the depths of the Pacific Ocean, to the Amazon River, to the small creek in your backyard, there are SonTek/YSI instruments hard at work everyday.

And keeping it easy to use is part of what SonTek/YSI is all about. Industry-leading software packages tailored for your application help give you the confidence you need. Be it for directional wave analysis, river discharge calculation, or flow monitoring, SonTek/YSI has a complete solution.

A strong commitment to customer service is a cornerstone of our philosophy. When you call SonTek/YSI, you have the expertise you need at your disposal. Our professional staff includes experts in fluid dynamics, oceanography, hydrology, and all the engineering disciplines. We are happy to have this opportunity to show you who we are, and we look forward to helping you with your application.

We truly are "The World Leader for Water Velocity Measurement".

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