Get fast, lab-accurate, repeatable results, in one easy-to-use handheld instrument. Ideal for testing water in the field or in the lab, Ultrameter II quickly, accurately, and precisely measures six water quality parameters: conductivity, resistivity, TDS, pH, ORP, and temperature. Ultrameter II is lightweight, portable, buoyant, waterproof, easy to calibrate, and easy to use. Simply sample water and press a parameter button. Results display immediately on an LCD screen.