Mettler Toledo 30249570 in-Lab Model Surface Pro-ISM pH Sensor for Specific Application, 1–11 pH Range: Amazon.com: Industrial & Scientific
pH Sensor InLab® Routine Pro - Overview - METTLER TOLEDO
METTLER-TOLEDO 51343157 InLab Surface Special pH Electrode, 1 to 11 pH Range, 0 to 50 Degree C Temperature Range, 110 mm Shaft Length, 12 mm Shaft Diameter: Science Lab Supplies: Amazon.com: Industrial & Scientific