Double junction pH electrode MA911B/2 Back Catalog number: MA911B/2 Manufacturer: MILWAUKEE ELECTRONICS Availability: In the manufacturer's stock Price on request - + Recommended MA921B/2 Double junction ORP platinum electrode MA921B/2 Price on request MA840 Polarographic DO probe with 3m cable Price on request MA9305 Pack of 100 x 1.4V batteries. Price on request