REFEX™ Series 399 1” NPT pH Combination Electrode
Maintenance free REFEX™ Series 399 electrodes are designed for pH measurement in rugged applications. Series 399 combination electrodes feature the patented REFEX Contact Window, a non-porous, hard ionically conductive interface/barrier to prevent reference electrode electrolyte loss and poisoning.
REFEX™ Series 399 1” NPT pH Combination Electrode
Data Sheet