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Immerse Electrode: Submerge the pH electrode in the buffer solution

aquariums Connection P BNC + pin*

The low-range capability (0-300 ppb) of the HI749 system is specifically designed for compliance with these stringent standards and early detection of contamination

If using a refillable pH electrode

Hanna HI97771C Free & Total Chlorine Photometer - Ultra High Range 0-10 ppm multiparameter sensor maple syrupHanna HI97771C Free & Total Chlorine Photometer Kit Ultra High Range Precision The Hanna HI97771C Free and Total Chlorine Portable Photometer Kit is a professional grade colorimeter designed for ultra high range chlorine measurement from 0 to 10 ppm. This complete kit measures both free and total chlorine with lab grade accuracy, making it ideal for high chlorine applications in pools, spas, water treatment facilities, and industrial water quality