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手持式合金分析仪 合金分析仪 Hand- held spectrometer

Environmental protection

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Water Quality Online Analyzer-COD

Model: WAOL 2000-COD
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Product description, technical parameters and configuration

Instrument introduction

WAOL2000-COD Cr water quality online analyzer can realize the automatic online monitoring of chemical oxygen demand in water samples. The instrument monitoring data and operating status can be transmitted to the environmental monitoring system center through the data acquisition instrument; the environmental monitoring system center can also send anti-control instructions to control the instrument to complete the measurement, calibration and other processes. WAOL2000 series instruments can be widely used in automatic monitoring stations, water plants, regional water boundary points, water quality heavy metal monitoring of sewage discharge, and environmental monitoring agencies at all levels to monitor the water environment.

WAOL2000-COD Cr adopts the colorimetric method for measurement. After the water sample is filtered, the hexavalent chromium in the mixed solution formed by the water sample, potassium dichromate, silver sulfate, mercury sulfate and concentrated sulfuric acid is reduced to trivalent chromium under the conditions of high temperature and high pressure digestion. The color of the mixed solution changed, and the degree of change in the color of the solution was directly proportional to the chemical oxygen demand of the water sample. The absorbance was measured at 620 nm. In a certain concentration range, the COD value in the water sample to be measured conforms to Lambert-Beer's law. The COD value is calculated by measuring the absorbance according to the calibration parameters stored in the instrument.


Performance characteristics

With automatic dilution function, it can expand the measurement of high-concentration water samples;

There are three measurement modes: continuous, interval, and hour. The interval measurement mode can be set, and the user can configure the measurement interval time.

With automatic and manual correction functions, the automatic correction frequency can be flexibly set;

With auto-recovery function after power failure, incoming calls will restore to the state set before power failure after power failure;

Alarm function for instrument operation failure: no reagent, no water sample, measurement value exceeding standard, hardware failure and other alarm functions;

Display instrument running status and setting information, and the instrument can be set and operated through touch screen;

The instrument can store operating data for more than one year;

The instrument has a reasonable structure and a modular design concept, which facilitates operation and low maintenance.

Independently developed AC modulation detection circuit and filtering algorithm to improve the life and stability of the light source and improve the measurement stability;

The sampling system with a filtering device can effectively filter impurities in the water sample to be tested, protect the sampling system, and make the measurement more accurate.


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手持式合金分析仪 合金分析仪 Hand- held spectrometer