Combined pH electrode MA920B/1 Back Catalog number: MA920B/1 Manufacturer: MILWAUKEE ELECTRONICS Availability: In the manufacturer's stock Price on request - + Recommended MA841 Spare membrane for MW600 (5 pcs). Price on request MA911B/2 Double junction pH electrode MA911B/2 Price on request MA905B/3 Combination pH electrode MA905B/3 Price on request