WE440

Product brand:

YOKOGAWA/YOKOGAWA

Product feature:

• Based on ammonium molybdate spectrophotometry (molybdenum-antimony anti-method) • Equipped with LED light source and photoelectric detector, ensuring stable light intensity without attenuation • Features automatic calibration, automatic cleaning, and automatic validation functions • Dual-compartment casing design, fully isolating electronic components from wet parts • Color graphic touchscreen interface, supporting multilingual switching • Built-in data logger, supporting USB data download • Constant pressure dosing and diaphragm pump technology, ensuring low reagent consumption • Optional single-channel or dual-channel measurement versions

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Measuring principle:

The measurement principle of the WE440 phosphate analyzer is based on the ammonium molybdate spectrophotometric method. Under acidic conditions, phosphate in the water sample reacts with ammonium molybdate to form phosphomolybdate heteropolyacid, which is subsequently reduced by ascorbic acid to a blue phosphomolybdenum complex. The instrument determines the phosphate concentration by measuring the absorbance of this complex at a specific wavelength (typically 660 nm or 880 nm) and calculating the concentration according to the Lambert-Beer law.

Product positioning:

Using scenario:

The WE440 phosphate analyzer is primarily used in the boiler feedwater and boiler water systems of thermal power plants, nuclear power plants, and the chemical industry. It precisely controls the dosage of phosphate by continuously monitoring phosphate concentration online, preventing boiler scaling and corrosion, and ensuring that the steam quality meets the operational standards of thermal equipment.

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2D/3D

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Summary

WE440 general specifications.pdf

WE440 user's manual.pdf

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