Salinometer is an instrument used to quickly determine the weight percentage concentration or refractive index of salt (sodium chloride) solution. Widely used in salt industry, food, beverage and other industrial sectors and agricultural production and scientific research. It usually consists of sensors, measuring circuits and data processing equipment.
Working principle of salinity meter:
Salinometer mainly uses the refraction phenomenon when light enters another medium from one medium, and the ratio of sine of incident angle is constant, which is called refractive index. Using the content of soluble substances in salt solution is directly proportional to the refractive index in ordinary environment, the refractive index of salt solution can be determined, so that the salinity meter/refractometer can calculate the concentration of salt.
Judging from the variety of salinometers appearing in the market at present, the salinity units used by salinometers are different according to the different use environments. So how can customers know these salinity units and their relationship when purchasing these salinity meters? Let's summarize the common salinometer units in the market and their conversion relationships:
1.""-This unit is the most common and easy to understand. For example, 2% salinity means that 100g salt water contains 2g salt, and the ratio is 2g/ 100g, which is equivalent to 2%.
2. "ppm"-this unit is also very common, ppm=partpermillion, which means one in a million. For example, the SB2000 seawater salinity meter sold by Hefei Joss Instruments has a range of (0~5.0%), which is equivalent to its range of (0~50000ppm).
3. "PPT"-this salinity unit is widely used in the laboratory, ppt=partperthousand, which means one thousandth. For example, the model 505 1 salinometer sold by Hefei Qiaosi Instruments has a measuring range of (0~5.0ppt), which is equivalent to its measuring range of (0 ~ 5,000 ppm). (0~0.5%)