Online COD detector sensor analyzer manufacturer

Its working process is to fill a flowing sample pool with the water sample to be measured, and the light source emits strong ultraviolet light that passes through the sample pool and reaches the semi reflective mirror to split the light beam into two, one path of lightThe working beam is directed directly onto the sample detector, while the reference beam is directed onto the reference detector. The working wavelength of the working beam is different from that of the reference beam, and the absorption of optical energy by the water sample is also different. By comparing the signals of two detectors, the specific absorption coefficient can be obtained, which is a physical quantity used to measure the total amount of organic pollutants in water.

Online COD sensorFrom the working principle of UV method online COD monitoring instrument, UV method has obvious characteristics suitable for online monitoring. Firstly, the UV absorption process of the UV method can be completed in a few seconds. The data processor has a fast data processing speed, and with the flushing time of the sample tank, a measurement process can be completed in about 1 minute, which is an unparalleled advantage of other COD measurement methods. Secondly, the interference of UV dual wavelength measurement on water samples can be compensated and deducted from the results, without the need for pre-treatment of the water samples. Regularly using the national standard potassium dichromate method to measure the sample calibration conversion coefficient, achieving low-cost online operation. These distinct characteristics are the prerequisite for achieving online monitoring.