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.
Your Price $40.93 / each Estimate Shipping · Price Match
18.1% Off Suggested Retail Price $49.95 You Save $9.02!
Note: Calibration Buffer Solutions are available separately.
— Ships from Portland, Oregon USA