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Extech ExStik® II Dissolved Oxygen Meter

Item # 125065

Easily monitor dissolved oxygen levels in your streams, ponds and more. This easy-to-use meter displays the oxygen level as percent saturation from 0—200% or concentration from 0—20.00 ppm. It also has adjustable altitude compensation, adjustable salinity compensation and a bar graph that indicates trends. Its built-in memory stores up to 25 data sets with DO and temperature readings. Self-calibrates at power-up for worry-free performance. Waterproof to IP57 for added safety if dropped. It also features data hold, auto power-off and a low battery indicator. Includes a DO electrode, protective sensor cap, spare membrane cap, electrolyte, (4) 3V CR-2032 batteries and 4" neck strap. Measures 1.4" x 6.9" x 1.6". Weighs 3.8 oz.



Max Resolution

Basic Accuracy

DO (Saturation Mode)



?2% FS

DO (Concentration Mode)

0 to 20.00 ppm (mg/L)

0.01 ppm (mg/L)

0.4 ppm (mg/L)


32 to 122°F (0 to 50°C)


?1.8°F (1°C)

Online Documents
  • Info Sheet - Specs for Extech ® ExStik ® II Dissolved Oxygen Meter
  • Owner's Manual - Instruction Manual for Extech ® ExStik ® II Dissolved Oxygen Meter
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