If your 24-7 Nutrient Monitor pH electrode breaks or wears out, order this item. This electrode is compatible with the combination Hanna meter listed on this site as HI9813-6 GROCHECK PORTABLE COMBO.
Price: $36.30 / each
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Note: Calibration Buffer Solutions are available separately.
— Ships from Portland, Oregon USA.
For more information, please visit the manufacturer
Hanna Instruments' website.
See more Hanna Instruments products.