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 MA812/2 Conductivity/TDS probe with 2meter cable(MC 310). Price on request MA915B/2 pH glass electrode for with 2meter cable. Price on request