Photometers are photometric measurement instruments that can be used to measure the concentration of organic and inorganic compounds in solution by determining the absorbance of specific wavelengths of light.
![YSI 900 [250900Y] Free and Total Chlorine Colorimeter](image/cache/wp/gj/Products/YSI_900-200x200.webp "YSI 900 [250900Y] Free and Total Chlorine Colorimeter")
![HANNA Instruments HI-759 [HI759] Maple Syrup Digital Grader](image/cache/wp/gj/Products/HANNA_HI759-200x200.webp "HANNA Instruments HI-759 [HI759] Maple Syrup Digital Grader")
![HANNA Instruments Checker HC [HI727] Color of Water](image/cache/wp/gj/Products/HANNA_HI759-Front-200x200.webp "HANNA Instruments Checker HC [HI727] Color of Water")
![HF Scientific 10478 [10478] Chlorine Pocket Photometer](image/cache/wp/gj/Products/HF-Scientific_10478-200x200.webp "HF Scientific 10478 [10478] Chlorine Pocket Photometer")
![HF Scientific 10474 [10474] Chlorine Dioxide Pocket Photometer](image/cache/wp/gj/Products/HF-Scientific_10474-200x200.webp "HF Scientific 10474 [10474] Chlorine Dioxide Pocket Photometer")
![HANNA Instruments HI-96732 [HI96732] Dissolved Oxygen Portable Photometer](image/cache/wp/gj/Products/HANNA_HI-96732-200x200.webp "HANNA Instruments HI-96732 [HI96732] Dissolved Oxygen Portable Photometer")
![HANNA Instruments HI-83224 [HI83224-02] Wastewater Multiparameter Benchtop Photometer with COD and Barcode Recognition](image/cache/wp/gj/Products/Hanna_HI83224-200x200.webp "HANNA Instruments HI-83224 [HI83224-02] Wastewater Multiparameter Benchtop Photometer with COD and Barcode Recognition")
![HANNA Instruments HI-83326 [HI83326-02] Pool and Spa Photometer and pH Meter](image/cache/wp/gj/Products/HANNA_HI83326-200x200.webp "HANNA Instruments HI-83326 [HI83326-02] Pool and Spa Photometer and pH Meter")
![HANNA Instruments HI-83325 [HI83325-02] Nutrient Analysis Photometer and pH Meter](image/cache/wp/gj/Products/HANNA_HI83325-200x200.webp "HANNA Instruments HI-83325 [HI83325-02] Nutrient Analysis Photometer and pH Meter")
![HANNA Instruments HI-83303 [HI83303-02] AquaCulture Multi-Parameter Photometer with pH Meter](image/cache/wp/gp/Products/HANNA_HI83303-200x200.webp "HANNA Instruments HI-83303 [HI83303-02] AquaCulture Multi-Parameter Photometer with pH Meter")
![HANNA Instruments HI-83305 [HI83305-02] Boiler and Cooling Tower Photometer and pH Meter](image/cache/wp/gp/Products/HANNA_HI83305-200x200.webp "HANNA Instruments HI-83305 [HI83305-02] Boiler and Cooling Tower Photometer and pH Meter")
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