Rugged and reliable, the YSI Pro1030; provides everything you need in a handheld instrument for the measurement of either pH or ORP along with conductivity and temperature. User-replaceable pH and ORP sensors and cables, 50 data set memory, and convenient calibration routine makes it user friendly. Mil-spec (military spec) connectors, IP67 waterproof and rubber over molded case, and 1-meter drop tests ensure the instrument remains in your hands to provide years of sampling even in the harshest field conditions. • 3-year instrument; 2-year cable; 1-year sensor warranty • User-replaceable cables and sensors (pH and ORP). Super stable, 4-electrode conductivity sensor built into the cable. • Smart calibration in the instrument remembers the previous calibration values and simply walks you through the routine. • Stores 50 data sets; no need to write down data • Graphic, backlit display and glow in the dark keypad. • Available with 1- 4- 10- 20- and 30-m cable lengths standard. • Tough. IP67, impact-resistant, waterproof case. Waterproof without the battery cover as well. Rubber over molded case provides extra durability. Military spec connectors. • A true field instrument – the display is visible with polarized sunglasses on. • Multiple languages include English, Spanish, French, and Portuguese.