The pH Probe from Bluelab is a high-quality replacement pH sensor designed to keep your Bluelab meters, monitors, and controllers operating at peak accuracy. Engineered with a double-junction reference for reduced contamination and longer service life, this robust probe delivers reliable pH readings from 0.0 to 14.0 in hydroponic and nutrient solutions, just like the brands Multimedia pH Meter and pH Pen. Built with a waterproof body and a 2 metre / 6.6 ft cable with a standard BNC connector, it’s easy to install and compatible with a wide range of Bluelab devices, while a KCl-filled storage cap and included probe holder help protect the electrode between uses. Ideal for cultivators who routinely monitor pH and nutrient uptake, this probe ensures lasting performance and precision without replacing your entire meter.