![HANNA HI97701 residual chlorine [free chlorine] Portable Photometer](http://img.nbchao.com/imgs/100/2024/02/01/1506500383699103.jpg)
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![HANNA HI97701 residual chlorine [free chlorine] Portable Photometer](http://img.nbchao.com/imgs/800/2024/02/01/1506500383699103.jpg)
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[Statement] The pictures are for users' reference. Due to product upgrading or shooting level, please refer to the real object