Dissolved Oxygen (DO) Meter

A dissolved oxygen (DO) meter is a device used to measure the amount of oxygen dissolved in water. This measurement is crucial for various applications, including:

• Aquaculture: Ensuring optimal water conditions for fish and other aquatic organisms.
• Wastewater Treatment: Monitoring the efficiency of biological processes in wastewater treatment plants.
• Environmental Monitoring: Assessing water quality in lakes, rivers, and oceans.
• Laboratory Research: Conducting experiments that require precise oxygen control.

How it Works:

Dissolved oxygen meters typically use one of the following methods to measure DO:

1. Polarographic Method:

   • A probe with a platinum cathode and a silver anode is immersed in the water.
   • A small current is applied, causing oxygen to be reduced at the cathode.
   • The resulting current is proportional to the dissolved oxygen concentration.

2. Optical Method:

   • A fluorescent sensor is used to measure the intensity of light emitted by a fluorescent dye when exposed to oxygen.
   • The intensity of the emitted light is directly related to the dissolved oxygen concentration.

Key Features of DO Meters:

• Accuracy: Precise measurement of dissolved oxygen levels.
• Sensitivity: Ability to detect small changes in oxygen concentration.
• Durability: Robust construction for field use.
• Ease of Use: User-friendly interface and simple calibration procedures.
• Data Logging: Ability to store measurement data for analysis.
• Temperature Compensation: Automatic adjustment for temperature variations.

By using a DO meter, you can monitor water quality, optimize aquaculture practices, and ensure the health of aquatic ecosystems.