Combined glass pH electrode MA991B/1 Back Catalog number: MA991B/1 Manufacturer: MILWAUKEE ELECTRONICS Availability: In the manufacturer's stock Price on request - + Recommended SE220 Double junction pH electrode SE220 Price on request 52002987 pH Sensor InPro4260/120/PT1000 Price on request 52002547 pH Sensor InPro3250/120/PT100 Price on request