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美國IQ Scientific Instruments 
美國IQ公司是全世界獨家生產（ISFET）硅芯片PH電極以及多參數分析儀器的廠商。擁有先進專利技術，創新的硅芯片電極、各種不同型號不銹鋼PH電極、在全世界得到用戶好評。
IQ Scientific Instruments provides high quality ISFET technology non-glass pH sensors. Choose from a full line of non-glass benchtop, handheld and pocket-sized systems. Benefits include: no glass to break, pH probes store Dry, easy to clean, no maintenance and long-lasting. IQ Scientific provides advanced technology that will eliminate your daily frustrations with glass sensor breakage and maintenance.
IQ的主要產品：
IQ120 125 非玻璃電極筆式pH計.
IQ140經濟型便攜PH ORP 計.
IQ150土壤原位PH計.
IQ240 高級精密多功能PH計.
IQ260臺式高級PH測定儀.
IQ 170 多用pH電導計.
IQ340 350電導TDS,鹽度計.
IQ160G便攜PH，離子測定儀.
IQ180G便攜多參數水質分析儀.
IQ280臺式高級多參數水質分析儀.