Online Phosphate Analyzer

I. Applications

Widely used to monitor the phosphate content of boiler feed water, saturated steam, condensate, main steam, drain water and cooling water in thermal power plants, cogeneration plants, chemical plants, chemical fibre plants and other industries. It can also be used for the automatic determination of related components in sewage and drinking water, monitoring water and steam quality promptly and accurately to ensure the safe and economical operation of generating units.

II. Measuring Principle

The phosphate meter can analyse up to 6 different water samples, and sample flows from as low as 50 mL/min up to 1,000 mL/min are handled well, so the sample is always renewed quickly. The sample is fed into a colour cell that combines mixing, reaction and colorimetric measurement. In an acidic medium the phosphate in the sample reacts with the molybdate and metavanadate in the added reagent to form an orange-yellow complex whose colour depth is proportional to the phosphate concentration; measuring its absorbance therefore determines the phosphate content of the water sample.

III. Key Features

1. Accurate reagent detection with timely prompts for reagent replacement and calibration, ensuring timely and accurate measurement.

2. Two-point calibration of zero and slope avoids the inconvenience and error-proneness of multi-point calibration.

3. Automatic calibration: once started it runs to completion without operator involvement.

4. Effectively solves inaccurate measurement caused by ambient temperature changes, especially insufficient reaction at low temperature.

5. Effectively solves the inconsistency of reagent dosing caused by reagent level changes, making the measurement more accurate.

6. The measuring interval can be set freely, greatly saving reagent and lowering cost.

7. Automatic cleaning keeps the meter free from crystallisation and blockage, allowing long periods of trouble-free operation.

8. Accurate measurement even when the sample has some colour and turbidity, without interference.

9. Electromagnetic compatibility (EMC / RFI) design strictly in accordance with European standards EN50081 / EN50082, greatly improving immunity to interference.

10. Imported electrical components and parts are used for the control and circuit sections, so they are never the weak link of the instrument.

IV. Technical Parameters