Triple beam balance

The triple beam balance is an instrument used to measure mass very precisely. Such devices typically have a reading error of ±0.05 grams. Its name refers to its three beams, where the middle beam is the largest, the far beam of medium size, and the front beam the smallest. The difference in size of the beams indicates the difference in weights and reading scale that each beam measures. Typically, the reading scale of the middle beam reads in 100 gram increments, the far beam in 10 gram increments, and the front beam can read from 0 to 10 grams. The triple beam balance can be used to measure mass directly from the objects, find mass by difference for liquid, and measure out substances.
Parts of a triple beam balance.
The parts of triple beam balance are identified as the following.
Before using triple beam balance, the scale pointer should be at zero. The zero adjustment knob can be used to adjust the scale pointer. Place the objects on the pan and adjust the riders. The hundred rider should be initially adjusted and follow by the tens rider. Adjust the ones rider until the scale pointer is at zero again.