The scale is also called "weighing". Weighing instruments or all instruments that measure the weight of unequal arms are called scales, or lifting lever scales that measure the weight of weighed objects by looking at scales, or scales for short. Unequal-arm weighing instruments existed in the Warring States period.

When did the domestic steelyard begin? There is no conclusion yet. The unearthed bronze balance bar of the King of Chu has a scale of ten equal parts, which is supposed to be a sign of hanging heavy objects in different parts during weighing, and it is likely to be a weighing instrument during the transition from an equal arm scale to a steel scale. After the eastern Han dynasty, it evolved into a scale that looked at the weight from the scales.

2. Xunzi

The scientific name of scorpion is scale, which was invented by Liu (according to legend) in Song Dynasty. It belongs to a small scale, which is a precision weighing instrument specially used to weigh gold and silver, precious drugs and spices in the old society. Because of its exquisite materials, fine workmanship and unique skills, it is also regarded as a very high-grade collection.

3. Weighing apparatus

Weighing instruments are instruments used to measure the length, capacity and weight of objects, which are collectively called "weights and measures" in China. China ancient weighing instruments are rooted in history and culture, and its development history itself is a condensed picture of ancient social life.

4. Weighing instruments

Weighing instrument, also known as weighing display control instrument, is an electronic device that converts the signal of weighing sensor (or through weight transmitter) into weight digital display and can store, count and print weight data. It is often used for automatic batching and weighing in industrial and agricultural production to improve production efficiency.

5. Electronic platform scale

Electronic platform scale is a weighing instrument that uses the principle of electronic strain element to output tiny analog electrical signals, which are transmitted to the weighing display instrument through signal cables for weighing operation and display weighing results.

After the founding of New China, the measurement system began to be unified, a new measurement adapted to economic development was established, and the measurement changed from traditional to modern.