Digital UV-COD sensor

The digital UV-COD sensor, based on the Lambert-Beer absorption law, utilizes high-brightness UV LEDs of specific wavelengths to irradiate organic substances in water samples. The intensity of the absorbed light signal is correlated with the organic content. The sensor employs a digital and intelligent design concept, capable of automatically compensating for the effects of light source fluctuations and component aging on measurement values. It directly outputs standardized digital signals, enabling networking and system integration without the need for a controller.

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Product overview of digital UV-COD sensor

Product features of digital UV-COD sensor

• The use of high-brightness UV LED as the excitation light source ensures stable luminous efficiency and a long lifespan.
• Built-in light source intensity reference detection is unaffected by light source attenuation.
• Unique optical and electronic filtering technologies are employed to eliminate the influence of ambient light and other substances' fluorescence on measurements.
• Digital sensors with RS485 signal output exhibit strong anti-interference capabilities and allow for longer transmission distances.
• The automatic cleaning of the cleaning brush significantly reduces maintenance workload.

Performance indicators of digital UV-COD sensor

Measurement parameters	COD、 SAC254、Turbidity (used for compensation)
Measurement principle	Ultraviolet absorption method(254nm+546nm)
Measurement method	Immersive measurement
Range	COD: (0-200)mg/L SAC254: 0~75Abs/m Turbidity: (0～300)NTU	COD: (0-500)mg/L SAC254: 0~150Abs/m Turbidity: (0～600)NTU	COD: (0-1000)mg/L SAC254: 0~300Abs/m Turbidity: (0～1000)NTU
Accuracy	(COD、 SAC254): ±5% Turbidity: ±5%
Repetitiveness	(COD、 SAC254): ±2% Turbidity: ±5%
Resolution	SAC254: 0.1 Abs/m COD: 0.1mg/L Turbidity: 0.1NTU
Detection limit	SAC254: 0.3Abs/m COD: 0.8mg/L Turbidity: 0.5NTU	SAC254: 0.5Abs/m COD: 1.6mg/L Turbidity: 1.0NTU	SAC254: 1.0Abs/m COD: 3.0mg/L Turbidity: 2.0NTU
Response time	≤15s
Zero deviation(24h)	(COD、SAC254): ±2% F.S Turbidity: ±5%
Range deviation(24h)	(COD、SAC254): ±2% F.S Turbidity: ±5%
Calibration cycle	6 months
Temperature range	(0～60)℃
Protection level	IP68、Underwater 60m
Cleaning method	Automatic cleaning of mechanical brushes
MTBF	≥1440h/time
Communication method	RS485(Modbus RTU)、Maximum baud rate115200 bps
Power supply voltage	12/24V DC
Power consumption	0.5W(In non-cleaning mode)
Material	Stainless steel S316L、POM
Weight	0.7kg

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