The ExStik® II DO600 meter displays oxygen levels as a percentage of saturation ranging from 0 to 200. 0 percent or concentration ranges from 0 to 20.00 ppm (mg/L). It has adjustable altitude compensation (0 to 20,000 feet in 1,000-foot increments), adjustable salinity compensation (0 to 50 ppt), and an analog bargraph to indicate trends. The DO600 meter includes a DO electrode, protective sensor cap, replaceable membrane cap, electrolyte, four 3V CR-2032 batteries, and a 48" (1.2m) neck strap.