This Vernier Optical DO Probe uses luminescent technology to provide fast, easy, and accurate results, making it a terrific choice for biology, ecology, or environmental science courses. Students can measure dissolved oxygen concentration in surface water or to perform a wide variety of experiments to determine changes in dissolved oxygen levels, one of the primary indicators of the quality of an aquatic environment.

• Plug-and-play technology–no filling solution, warm-up time, stirring, or calibration necessary
• Built-in temperature and pressure compensation
• Easy maintenance
• Switch setting to measure in units of mg/L or % saturation

The Optical DO Probe cap is warranted to be free from defects for a period of ​two years​ from the date of purchase. With proper use, the lifetime of the cap may be longer than two​ year​s​.

Specifications

• Range: 0 to 20 mg/L (or ppm), 0 to 300%
• Accuracy:
  • mg/L
    • ±0.2 mg/L below 10 mg/L
    • ±0.4 mg/L above 10 mg/L
  • %
    • ±2% below 100%
    • ±5% above 100%
• Response Time: 90% of final reading in 40 seconds
• Typical Resolution: 0.006 mg/L
• Temperature Compensation: automatic from 0–50°C
• Pressure Compensation: automatic from 228 mmHg to 1519 mmHg
• Minimum sample flow: none