美国IQ Scientific Instruments  www.phmeters.com
美国IQ公司是全世界独家生产（ISFET）硅芯片PH电极以及多参数分析仪器的厂商。拥有先进专利技术，创新的硅芯片电极、各种不同型号不锈钢PH电极、在全世界得到用户好评。
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的主要产品：
IQ120 125 非玻璃电极笔式pH计.
IQ140经济型便携PH ORP 计.
IQ150土壤原位PH计.
IQ240 高级精密多功能PH计.
IQ260台式高级PH测定仪.
IQ 170 多用pH电导计.
IQ340 350电导TDS,盐度计.
IQ160G便携PH，离子测定仪.
IQ180G便携多参数水质分析仪.
IQ280台式高级多参数水质分析仪.