pH electrode InLab Expert Pro Back Catalog number: 51343101 Availability: In the manufacturer's stock Price on request - + Recommended MA9305 Pack of 100 x 1.4V batteries. Price on request MA851D/1 pH/EC/TDS/Temp. amplified probe, 1m Price on request MA913B/3 Combined Epoxy pH electrode MA913B/3 Price on request