COL-306 is a online water quality digital sensor that uses dual wavelength ultraviolet absorption method. It can simultaneously measure three parameters: chromaticity, turbidity, and temperature. It comes with turbidity interference automatic compensation and self-cleaning brush, does not require reagents, is pollution-free, and is suitable for continuous online monitoring of drinking water, surface water, municipal sewage, industrial drainage and other scenarios. It has the advantages of easy installation, high stability, and low maintenance cost.
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Parameters
| Item | Specification |
|---|---|
| Model | COL-306 |
| Measuring Principle | Dual-wavelength UV Absorption Method |
| Color Measuring Range | 0 ~ 2000 Hazen |
| Color Accuracy | ±5% F.S. |
| Color Resolution | 1 Hazen |
| Turbidity Measuring Range | 0 ~ 400 NTU |
| Turbidity Accuracy | ±5% F.S. |
| Turbidity Resolution | 0.1 NTU |
| Temperature Measuring Range | 0 ~ 45 °C |
| Temperature Resolution | 0.1 °C |
| Calibration Method | Two-point Calibration |
| Signal Output | RS-485 (Modbus/RTU) |
| Power Supply | 12 ~ 24 VDC |
| Power Consumption | 0.2 W @12 V |
| Operating Conditions | 0 ~ 45 °C, < 0.1 MPa |
| Storage Temperature | -5 ~ 65 °C |
| Protection Grade | IP68 |
| Installation | Immersion Type |
| Housing Material | POM + 316L Stainless Steel |
| Cable Length | 5 m (customizable length) |
Why choose this digital sensor?
- One equipment can measure three things at once: chromaticity, turbidity, and temperature.
- More accurate data with dual wavelength measurement and automatic adjustment for turbidity.
- No need for reagent testing, it’s green and good for the environment, and it doesn’t cost much to run.
- Includes a brush that cleans itself to cut down on the need for human cleaning.
- IP68 waterproof and resistant to rust, so it may work underwater for a long time.
Working Principle
The sensor measures the chromaticity of water using visible light with a wavelength of 470nm, while synchronously measuring turbidity using a reference light. The built-in algorithm compensates for the attenuation of the light path, effectively eliminating the interference of suspended particles and achieving more stable and accurate chromaticity measurement; And synchronously collect temperature data, support temperature compensation, and ensure long-term online monitoring reliability.
Featured Applications
- Drinking Water Plant: Keeping an eye on the color of raw and finished water online
- Municipal sewage: checking the color of the water coming in and going out, the sedimentation tank, and the biochemical tank
- Surface water: keeping an eye on rivers, lakes, reservoirs, and other bodies of water in the terrain
- Industrial water treatment: keeping an eye on how sectors like printing and dyeing, chemicals, and food processing get rid of their waste
- Source of pollution in the environment: Constantly checking the quality of water at discharge points online
Instructions for installation
- Using immersion horizontal installation, measuring the window that is facing the flow of water
- The deepest immersion should not be more than 2 meters and should be below the lowest water level of 30 cm.
- Set up in a place with no bubbles or loud noises, away from direct sunlight
- The sensor needs to be adjusted when the water flow is rough to keep it from getting damaged.
- To keep the cables from extending too much, the wiring terminals should be treated with strict waterproofing.
- Do not touch the window for optical measurement with your hands.
Daily care and maintenance
- Every so often, clean the optical window with a soft cloth or clean water. Neutral detergent can get rid of spots that won’t come out.
- Check the wires, connectors, and cleaning brushes once a month to make sure they are in good shape and not broken or clogged.
- Setting the self-cleaning brush to work automatically can cut down on the number of times you have to do maintenance by hand.
- As required by law and water quality guidelines, two-point calibration should be done regularly.
- When used continuously for 18 months, it is suggested to go back to the factory for repair and to get a new dynamic sealing device.
- Keep the optical parts of the sensor from being badly hit, compressed, or scratched.
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The COL-306 online color sensor automatically adjusts for turbidity, cleans itself, doesn’t need maintenance, and sends a steady digital signal for accurate, dependable, and continuous color tracking in a variety of water conditions. Safe drinking water, waste reduction, and wild water monitoring can assist the environment and water quality. Online water quality monitors utilize this monitor since it’s reliable, inexpensive, and effective.
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