Author name: Marshall Mac

What are the ammonia nitrogen test methods

Ammonia nitrogen refers to the nitrogen in ammonia or ammonium state in water, which is one of the important indicators of eutrophication and pollution of water bodies. There are many methods for the determination of ammonia nitrogen, and this article will introduce five commonly used methods, namely Nessler’s reagent spectrophotometry, salicylic acid-hypochlorite spectrophotometry, distillation-neutralization titration, …

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What are the residual chlorine test methods? What are the pros and cons of each?

According to the “Hygienic Standard for Drinking Water” (GB5749-2006), the residual chlorine content of the factory water is ≥ 0.3mg/L, and the residual chlorine concentration of the water at the end of the pipe network is ≥0.05mg/L, which is not harmful to the human body. Although the residual chlorine of the latter still has the …

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What factors affect the results of residual chlorine testing?

In the case of continuous use, on-line residual chlorine analysis will inevitably encounter zero drift, system contamination, and interference factors caused by changes in sample flow rate, pH, temperature, etc., especially the residual chlorine concentration at the end of the pipe network is very low, and the residual chlorine content in the water is only …

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electromagnetic flowmeter VS ultrasonic flowmeter

Item comparison Electromagnetic Flowmeter Ultrasonic Flow Meter working principle Faraday’s law of electromagnetic induction Time difference between forward and reverse flow of ultrasonic waves measurable range Liquid with conductivity ≥5uS/cm Liquid, gas and steam can be measured installation method Tube type/plug-in type Pipe section/plug-in/clamp-on installation conditions Closure installation Installation under pressure installation cost high Low …

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