Combined glass pH electrode MA991B/1 Back Catalog number: MA991B/1 Manufacturer: MILWAUKEE ELECTRONICS Availability: In the manufacturer's stock Price on request - + Recommended MA911B/2 Double junction pH electrode MA911B/2 Price on request MA913B/3 Combined Epoxy pH electrode MA913B/3 Price on request SE510 Conductivity/TDS probe with 1meter cable SE510 Price on request