A portable dissolved oxygen meter (DO meter) is a device used to measure the dissolved oxygen content in water bodies, commonly used in water quality monitoring, environmental monitoring, aquaculture areas, and other places. The technical requirements include the following aspects:
1. Measurement range
Usually measured within the saturation range of 0-20mg/L or 0-200%.
Can meet the measurement needs of low and high concentrations.
2. Measurement accuracy
Accuracy: Generally ± 0.1mg/L or ± 1% saturation.
Resolution: It should have sufficient small resolution, such as 0.01mg/L or less.
3. Response time
Within 90% of the reaction time, do not exceed 30 seconds to ensure real-time monitoring effectiveness.
4. Temperature compensation
Equipped with automatic temperature compensation function (ATC), the typical operating temperature range is 0 ° C to 50 ° C.
The temperature compensation accuracy should not be lower than ± 0.1 ° C to ensure measurement accuracy at different ambient temperatures.
5. Sensor type
Electrode type sensors are used, usually using polarographic or fluorescent sensors.
Polarographic sensors need to provide necessary periodic calibration functions and have good stability.
Fluorescent sensors typically require lower maintenance frequencies and are not affected by factors such as bubbles and turbidity.
6. Battery life
The battery should be used for at least 10 hours to ensure long-term on-site use.
Rechargeable or conventional batteries, easy to replace and charge.
7. Data storage and output
It can store multiple measurement results, with a common storage capacity of 1000 or more pieces of data.
Support data transmission interfaces such as USB, Bluetooth, or wireless connections for easy data export and analysis.
The display screen should clearly show measurement values, time, temperature, and other information.
8. Protection level
The protection level should be at least IP65 to prevent water, dust, and adapt to outdoor environments.
9. Calibration method
Provide convenient zero and range calibration functions.
Can be calibrated on-site or in the laboratory, and supports calibration with standard dissolved oxygen solutions.
10. Portability and Design
Small in size, lightweight, and easy to carry.
The shell should have characteristics such as earthquake resistance and corrosion resistance, and be suitable for various harsh environments.
11. Operating interface
The interface is simple and easy to operate.
Equipped with an LCD display screen, supporting multiple languages (such as Chinese, English, etc.).
If you need more detailed technical requirements or specific brand equipment information, you can further understand some professional products.