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For low-conductivity water · no refilling
pH 0–11 · Long-life reference · Sealed, no refilling · Epoxy · 0–80°C · S7 – BNC (Q9)
For ultrapure and deionized water · ground-glass sleeve junction
pH 0–11 · Long-life reference · 3 M KCl · Glass · 0–80°C · S7 – BNC (Q9)