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RK500-25 COD (Chemical Oxygen Demand) Sensor
◆ The RK500-25 COD sensor adopts two light sources, one is ultraviolet light for measuring COD content in water and the other is reference light for measuring turbidity in water. The optical path attenuation is compensated by a specific algorithm, which can eliminate the interference of particulate suspended matter impurities on the measurement results to a certain extent, thus making the measurement results more stable and reliable.
► Most organic matter dissolved in water is absorbent to ultraviolet light. Therefore, the content of dissolved organic pollutants in water can be accurately measured by measuring the extent to which these organics absorb UV light at 254nm.
FEATURES:
● No reagent, no pollution, more economic and environmental
protection
● Sapphire measurement window, not afraid of sand abrasion
● Using advanced third-order curve method to ensure
accurate measurement
● With cleaning brush, automatic cleaning, can prevent
biological adhesion
● Small drift, fast response and more accurate measurement
● Excellent stability
● Maintenance free, long service life and low cost
● RS-485 interface, Modbus / RTU protocol
● Measuring principle: 254nm and 550nm dual wavelength absorption method
● Standard: DIN 38402 C2, DIN 38404 and HJ T191
● Range:
- COD: 0-500mg/L, 0-1000mg/L
- Turbidity: 0-200 NTU
● Accuracy: ±5% F.S.
● Resolution: 0.02mg/L
● Power: 12-28V DC
● Power consumption:
- When the cleaning brush is not working: <0.2W
- During the cleaning brush working: <1.5W
● Response time: <2s
● Output signal: 4-20mA and RS485
● Working environment: -5-+60℃ (<0.5MPa)
● Cable length: 5m (default), customizable
● Probe material: 316L stainless steel
● Ingress protection: IP68
● Storage: 10-60℃ at 20%-90% relative humidity
● Environmental protection
● Agriculture
● Aquaculture
● Water conservancy
● Sewage treatment
● Soil remediation
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