Combined pH electrode MA920B/1 Back Catalog number: MA920B/1 Manufacturer: MILWAUKEE ELECTRONICS Availability: In the manufacturer's stock Price on request - + Recommended MI57P ORP/Temp probe for ORP57 Price on request MA913B/3 Combined Epoxy pH electrode MA913B/3 Price on request MA814D/1 EC/TDS/Temp probe for Mi306 Price on request