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 52005384 pH Sensor InPro4800i/SG/225 Price on request SE300 Double junction orp platinum electrode SE300 Price on request