Question about hydrometer
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There are two types of specific gravity, one is called the gravity meter and the other is the light meter. Please tell me.: What are the models and measuring ranges of heavy gauges? Not sure if this question should be asked in this area? Thank you.
Regarding the questions raised by the original poster, the following answers are for reference only. A hydrometer is made based on Archimedes' law and the conditions under which an object floats on the liquid surface and is in equilibrium. It is an instrument for measuring the density of a liquid. It uses a sealed glass tube with uniform thickness at one end and a graduated paper on the inner wall. The other end is slightly enlarged and has a bubble shape. The bubble is filled with small lead particles or mercury, so that the glass tube can be immersed vertically in the liquid being tested to a sufficient depth and can float stably in the liquid. That is, when it is shaken in any way, it can automatically return to a vertical resting position. When a hydrometer floats in a liquid, its own gravity is equal to the gravity of the liquid it displaces. Therefore, when immersed in different liquids at different depths, they experience different pressures. The hydrometer is calibrated using this relationship. There are two commonly used hydrometers. A meter used to measure the density of liquids with a density greater than 1 is called a "gravity meter". Its lower end contains more lead shot or mercury. The smallest scale line of this hydrometer is "1", which is at the highest point of the scale line. From top to bottom, the order is, 1.1, 1.2, 1.3... If this hydrometer is placed in the water, its scale lines greater than 1 will all be under the water surface. The other is used to measure the density of liquids with a density less than 1, called the "light meter". Its lower part contains less lead shot or mercury. The maximum scale line of this hydrometer is "1". This scale line is at the lowest point. From bottom to top, it is, 0.9, 0.8, 0.7... When this hydrometer is placed in the water, its scale lines less than 1 are all on the water surface. When using it, you should pay attention to choosing this weight based on whether the density of the liquid is greater than 1 or less than 1.
The answer above is very clear. Even the structure and working principle are explained clearly.
I picked up a 1.000~1.100 one two days ago. The selected range should be determined based on the specific gravity and accuracy requirements of the medium to be measured. It is said that a complete set of full range can also be picked up according to the group plan.