Portable Dissolved Oxygen Meter- water quality sensor


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The dissolved oxygen meter is a sensing device used to measure the amount of oxygen dissolved in water. The continuous measurement of dissolved oxygen concentration in water plays an important role in the field of water treatment.


Dissolved oxygen probe:Dissolved oxygen probe does not need to replace the diaphragm, calibration is frequent, long-term maintenance-free, easy to use and install, and sensitive. It is suitable for industrial water quality monitoring, water plant aquaculture monitoring, river and lake sea water quality parameter monitoring, and other scenarios where maintenance is inconvenient and requires long-term monitoring.
Polarographic probe: The diaphragm often needs to be replaced and pickled. The cost of calibration and maintenance is high (on average once a week), and requires 5-15 minutes of warm-up time. It is suitable for water quality research, laboratory and other occasions.
The fluorescence dissolved oxygen meter is based on the principle of fluorescence quenching. The blue light irradiates the fluorescent material to excite the fluorescent material and emit red light. Since oxygen molecules can take away energy (quenching effect), the time and intensity of the excited red light is inversely proportional to the concentration of oxygen molecules. By measuring the phase difference between the excited red light and the reference light, and comparing it with the internal calibration value, the concentration of oxygen molecules can be calculated.

How to maintain the water quality sensor

Maintaining water quality sensors is crucial to ensure accurate and reliable data collection. Here are some general guidelines on how to maintain water quality sensors:

Regular Cleaning:

Clean the sensor housing and probe regularly to remove any debris, biofouling, or algae buildup.
Use a soft brush or cloth with mild detergent to clean the sensor surfaces gently.
When Rinse the sensor thoroughly with clean water after cleaning to remove any residue.


Calibrate the water quality sensor according to the manufacturer’s instructions and recommended frequency.
Calibration ensures that the sensor readings are accurate and reliable. When Regular calibration helps maintain data accuracy over time.


When Store the water quality sensor in a clean and dry environment when not in use.
Avoid storing the sensor in extreme temperatures or direct sunlight, as this can affect sensor performance.

Sensor Check:

Periodically check the sensor for any signs of damage, corrosion, or wear.
Replace any damaged components or sensors promptly to maintain accurate measurements.

Battery Replacement:

If the water quality sensor is battery-operated, monitor the battery life and replace the batteries as needed.
Low battery levels can affect sensor performance and data accuracy.

Sensor Maintenance Kits:

When Some water quality sensor manufacturers offer maintenance kits that include cleaning solutions, calibration standards, and replacement parts.
When Consider using these maintenance kits to ensure proper care and maintenance of the sensor.

Follow Manufacturer Guidelines:

Follow the manufacturer’s guidelines and instructions for specific maintenance procedures for your water quality sensor.
Different types of water quality sensors may have unique maintenance requirements, so it is essential to refer to the manufacturer’s recommendations.
By following these maintenance tips and guidelines, you can ensure that your water quality sensor remains in optimal condition and provides accurate data for monitoring water quality. When Regular maintenance and care of water quality sensors are essential for reliable and consistent measurements in various water monitoring applications.

Weight N/A
Accessible equipment

1-4 modbus device combination

letter of agreement

modbus serial communication protocol

disply data

equipment raw data

operating temperature


working humidity

<90%RH (Non-condensation)

power supply

DC4.5V/3 section 7# dry battery

disply method

2.8 backlight digital tube disply




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