Hach Pocket Pro and Pro+ deliver accurate results with built in diagnostics, replaceable batteries, and a large, easy-to-read LCD screen. Includes: tester, 4 AAA batteries, lanyard, calibration solution and quick start guide. Operating Temperature Range: 0 - 50 °C Parameter: HR TDS, Temp Range: 0 to 10.00 ppt Industry: Aquaculture, Chemical, Clinical/Medical Lab, Drinking Water, Fertigation, Food & Beverage, Oil & Gas, Petroleum, Storm Water, Waste Water, Hospitality, Agriculture