All scales that pass the inspection will be labeled as compulsory verification, and scales without compulsory verification are generally not allowed.
There is also a portable electronic scale, which is not accurate enough and has a large error. Physical balance has poor weighing accuracy and large error.
Electronic precision balance usually adopts closed-loop automatic adjustment system composed of electromagnetic force sensor and weighing sensor, which has high accuracy and good stability. It is a comprehensive product of the development of sensing technology, analog electronics technology, digital electronics technology and microprocessor technology, and has many functions such as automatic calibration, automatic display and overload protection.