The Radiometer GK2401C combination pH electrode has a glass body, Red-Rod reference system, refillable electrolyte (saturated KCl) and Radiometer Type 7 connector for compatibility with Radiometer MeterLab legacy meters.

• Red-Rod electrodes provide a stable signal fast by protecting the reference elements from light interference
• The Red-Rod saturated KCl salt-bridge also aids in creating a stable liquid junction potential
• Red-Rod system creates a trouble-free liquid junction: No silver ions and therefore less risk of clogging when measuring in challenging sample matrices
• Red-Rod reference system enables use over a wider range of temperatures than for most pH electrodes