The Mettler Toledo 405-DXK-S8/120 Combination pH Electrode Sensor is a high-quality lab equipment produced by Mettler Toledo in the United States. This pH electrode sensor is designed to accurately measure pH levels within the range of 2-14. With a unit quantity of 1, this product is essential for various medical, lab, and industrial applications requiring precise pH measurements. The Mettler Toledo brand is known for its reliability and durability, making this combination pH electrode sensor a valuable tool for professionals in the healthcare and research industries.