Combined glass pH electrode MA991B/1 Back Catalog number: MA991B/1 Manufacturer: MILWAUKEE ELECTRONICS Availability: In the manufacturer's stock Price on request - + Recommended MA918B/1 Comb glass pH electrode 3 dia, DJ,refill, BNC, 1m Price on request MA840 Polarographic DO probe with 3m cable Price on request MI58P pH/ORP/Temp probe for pH58 Price on request