Combined glass pH electrode MA991B/1 Back Catalog number: MA991B/1 Manufacturer: MILWAUKEE ELECTRONICS Availability: In the manufacturer's stock Price on request - + Recommended MA919B/1 Glass pH electrode, refillable, BNC, 1m Price on request MA917B/1 Comb glass pH electrode, DJ, refill, BNC, 1m Price on request MA923D/1 pH/ORP/Temp amplified probe MA923D/1 Price on request