Combined glass pH electrode MA991B/1 Back Catalog number: MA991B/1 Manufacturer: MILWAUKEE ELECTRONICS Availability: In the manufacturer's stock Price on request - + Recommended MA812/2 Conductivity/TDS probe with 2meter cable(MC 310). Price on request MA911B/2 Double junction pH electrode MA911B/2 Price on request MA924B/1 Glass ORP electrode MA924B/1 Price on request