How to detect COD in sewage?
Most people would definitely say to use the national standard method, but the national standard method takes a longer measurement time, with a reflux time of up to 2 hours! Moreover, the cost of inspection is high, the cycle is long, and the answer cannot be immediately known. It is even more difficult to adjust one's treatment process based on the initial COD concentration. Repeated inspection leads to process lag and substandard water quality discharge.
Ultraviolet absorption method (UV method for short) is used to measure COD without secondary pollution, with low cost, simple operation and maintenance, low failure rate, short testing time, and response time generally in the tens of seconds. The instrument has good stability, high reliability, and is not affected by chloride ions. The obvious advantages of UV method make it a technology that can be widely applied in the field of continuous monitoring.
Features of self-cleaning COD sensor:
(1) Low maintenance: No reagents required, no pollution, more economical and environmentally friendly; Equipped with a self-cleaning brush, it can prevent biological adhesion and greatly reduce maintenance, saving time and lowering maintenance costs for users.
(2) No calibration required: The probe has been calibrated before leaving the factory, so users do not need to calibrate it when using it. They can directly measure the concentration of chemical oxygen demand (COD).
(3) Convenient integration: RS485 digital interface, supporting MODBUS protocol, environmentally friendly design, can be easily integrated into water quality monitoring systems to meet customer needs.
(4) Durable: It can maintain its accuracy even in the event of scratches or partial contamination, and is easy to clean.
