Lab Grade Double Junction pH Probe

Neptune Systems' Double Junction pH Probe combines laboratory-grade precision with extended durability for demanding reef aquariums. The dual-chamber design shields the reference solution from contaminants—proteins, organics, and additives—that compromise standard probes, delivering stable readings and reducing calibration frequency to every 60–90 days. Its BNC connector integrates seamlessly with Neptune Apex systems and compatible controllers, while the 3-metre cable offers flexible placement. Built for serious hobbyists and professionals who demand reliability, this probe minimises downtime and maintains the accuracy your reef system depends on.