Is it harmful to human body to put electronic scales in the room?
Electronic scale is a kind of weighing instrument, which is a tool to measure the mass of objects by Hooke's law or the lever balance principle of force. According to the structural principle, it can be divided into three categories: mechanical scale, electronic scale and electromechanical combination scale.
Electronic scale is mainly composed of three parts: bearing system (such as scale plate and scale body), force transmission and conversion system (such as lever force transmission system and sensor) and indication system.
History:
According to textual research, the earliest evidence of the existence of scales can be traced back to the Indus Valley (in present-day Pakistan) from 2400 BC to 1800 BC. Before that, there was no standard and accuracy to measure weight.
In Egypt, scales can be traced back to BC 1878, but they may have been used earlier. The truly modern weighing scale was improved and invented by Leonardo da Vinci. With the development of electronic scale industry, many brands have gradually entered the China market, and electronic scales have been used by more people, and more and more electronic scale brands are familiar to human beings.
Refer to the above? Baidu encyclopedia-electronic scales