Description_x000D_ General description_x000D_ Designed with a Refillable Ag/AgCl reference half cell. These electrodes feature ultra thin insertion stems and miniature pH bulbs for measurement of the smallest of samples. Depends on the length, the extra long insertion stem allows this combination electrode to measure samples upto the bottom of 7 in. long NMR tubes._x000D_ Sturdy and versatile probe for measuring small samples in cuvets and small lab glassware 0-14 pH._x000D_ Attention: These electrodes come with a little white plastic transport cap attached to the end, please remove before use._x000D_ Temperature Range:_x000D_ • -5 to 100°C (for continuous use)_x000D_ • -5 to 110°C (for intermittent use)_x000D_ Linkage_x000D_ Help in selecting the correct electrode can be viewed at Electrode Selection Guide_x000D_ Hints on Electrode Maintenance_x000D_ Legal Information_x000D_ Sigma-Aldrich is a registered trademark of Sigma-Aldrich Co. LLC