Waterproof ExStik II Dissolved Oxygen Meter The ExStik II DO600 meter displays Oxygen level as percent of Saturation from 0 to 200. 0 percent or Concentration from 0 to 20.00 ppm (mg/L). It features Adjustable Altitude Compensation (0 to 20,000 feet in 1,000-foot increments), Adjustable Salinity Compensation from 0 to 50 ppt and an analog bargraph for indicating trends. Additional Features Built-in memory stores up to 25 data sets with DO and Temperature readings. Additional features include: self calibration on power up, data hold, auto power off, and low battery indicator. The DO600 is also waterproof to IP57. What"s in the Box Complete with DO605 electrode, protective sensor cap, spare membrane cap, electrolyte, sample cup with cap, four 3-volt CR-2032 batteries, and 48-inch neck strap. More Extech Instruments to Choose From DO600-K Waterproof ExStik II Dissolved Oxygen Meter Kit Convenient kit adds versatility for measuring Dissolved Oxygen in laboratories or out in the field with a 16-foot (5-meter) extension cable and probe weight guard for taking easy measurements in tanks or streams. The weight guard keeps the electrode submerged and protected in liquid samples. DO610 Waterproof ExStik II DO/ pH/Conductivity Kit User-friendly kit economically measures 6 parameters supporting water, wastewater, groundwater, aquaculture and fisheries professionals: Dissolved Oxygen, Conductivity, TDS, Salinity, pH, and Temperature. Includes sample pH buffers (4, 7, 10 pH and rinse solution), sample cups with weighted base, four CR2032 batteries and neck strap with each meter, and carrying case