The Oakton pH 50 Spear-Tip Waterproof Pocket pH Testr™ with its unique junction design provides increased electrolyte flow, resulting in greater contact between sample and reference, ensuring fast, stable readings. The electrode junction is 200 times larger than standard electrodes, making it virtually impossible to clog. Rugged spear tip makes it ideal for soft solids and semisolid materials like meats, cheeses, and fruit. The long, thin electrode can be used to determine pH in test tubes, micro tubes and other narrow containers. Additional features include a hold function, auto-off function, self-diagnostic error messages, and a three-segment battery-life indicator.