Combined pH electrode MA920B/1 Back Catalog number: MA920B/1 Manufacturer: MILWAUKEE ELECTRONICS Availability: In the manufacturer's stock Price on request - + Recommended MA9305 Pack of 100 x 1.4V batteries. Price on request MA921B/1 Double junction orp platinum electrode MA921B/1 Price on request 1580-500ML CHEMSOLUTE ready-to-use conductivity sol. 12880 µS/cm, 500ml (THG) Price on request