How does the acid concentration meter used for online monitoring of sulfuric acid determine the acid concentration?
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What else is there besides conductivity? And I’m confused about what other interfering factors there are besides temperature
It is generally calibrated through chemical titration (acid-base titration). Note that the acid concentration–conductivity–temperature curve is three-dimensional; many factories set the range of the acid concentration meter to a very small value and use approximate methods.
1. In addition to the conductivity method, there are also methods such as the specific gravity method, ultrasonic density method, and refractometer method. 2. When using the conductivity method for detection, in addition to temperature issues, there are also problems related to the interference from the conductivity of impurities, as well as issues with the measurement transition points.
Thank you. Sometimes rapid changes in temperature have a significant impact, but other times the effect is minor. Is there a certain range for setting and adjustment?
Shifang Jiekong Electromechanical Equipment Co., Ltd. http://www.dyjkjd.com/index.html CL100 series conductivity and pH meters, with a flow-through design and DN25 flange connections. The measuring element does not come into direct contact with the medium being measured, and there is no polarization effect; it is particularly suitable for measuring the concentration of highly corrosive media such as strong acids, strong bases, and salts. These instruments are widely used in power plants, the chemical industry, metallurgy, pharmaceuticals, food processing, and environmental protection sectors for continuous online monitoring of acid, alkali, and salt concentrations or conductivity, as well as in CIP processes for food and beverage industries. I. Main Technical Specifications 1. Measurement Range a) Concentration Measured Media Hydrochloric acid Sulfuric acid Nitric acid Sodium hydroxide Saltwater Concentration range (%) 0～5 0～10 25～40 0～5 0～25 35～80 94～99.5 0～25 35～50 0～5 0～10 25～40 0～4 27～30 Note: The above media are not the only ones; for other media, separate charges will apply for the generation of conductivity curves. b) Conductivity: 0～50(mS/cm) ； 0～200(mS/cm) ； 0～500 ； 0～1000(mS/cm) ； c) Temperature: 0～150℃ ； Instrument accuracy: Class 1.0 ； Temperature compensation range: 0～150℃ ； Temperature coefficient compensation range: 30 steps (0～9.99)%/℃ (adjustable) ； Concentration linearization: 30 segments ； Maximum operating temperature of the measurement probe: 150℃ ； Maximum operating pressure of the measuring probe: 10 MPa ； The measurement probe is made of polymer material, which offers good corrosion resistance and is suitable for all acids, bases, and salts ；