What Does The Accuracy Level of The Sensor Mean?

What does the accuracy level of the sensor mean?

Sensors who buy sensors should buy sensors with high accuracy. Sensor sellers say that their sensors have high accuracy. What is accuracy? How to divide the accuracy levels and the corresponding application scenarios.

1. Division of accuracy levels

The first thing to introduce is the International Organization of Legal Metrology (OIML). This organization was established in 1955 to strengthen the cooperation and contact between the metrology departments of various countries in legal metrology, promote the exchange of metrology technology, and solve the technical and management problems existing in the use of metrology instruments on an international scale.

The International Organization of Legal Metrology (OIML) R60 International Recommendation classifies sensors according to the comprehensive performance of weighing sensors, and divides weighing sensors into 4 accuracy levels: A, B, C, and D. And the upper and lower limits of the division number of each level are specified. For example, the division number of C is specified as the lower line is not less than 500, and the upper line is not more than 10000. The division number of 3000 can be expressed as C3, and the division number of 3500 can be expressed as C3.5. The C3 of the weighing sensor is 3000 divisions, which means that the comprehensive accuracy is divided into 3000 equal parts. It is generally believed that it can be accurate to 3/10,000 of the total range. It clearly indicates the accuracy of the weighing sensor.

The accuracy level of the weighing sensor refers to the reliability of the measurement result. It expresses the ability to repeat a certain reading with a given accuracy. The smaller the error, the higher the accuracy of the weighing sensor. The accuracy of sensors and instruments is generally 1/3000. Generally, domestic weighing sensors belong to the C3 level. C3 means 3000 divisions and the accuracy is 1/3000. The accuracy of imported weighing sensors is relatively higher. R60 "Weighing Sensor" International recommends that sensors be divided into four accuracy levels: A, B, C, and D. And the upper and lower limits of the divisions for each level are specified. As shown in the following weighing sensor accuracy level table:

2. Different precision sensors are suitable for different scenarios

A level: This is the highest accuracy level. Class A weighing sensors have the highest measurement accuracy and stability and are usually used in situations where high-precision weighing is required, such as weighing jewelry, precious metals, etc.

Class B: The accuracy of Class B weighing sensors is slightly lower than that of Class A, but they still have high measurement accuracy. It is suitable for some application scenarios with high precision requirements, such as chemical and pharmaceutical industries.

Class C: Class C weighing sensors are a more common accuracy level on the market. It has a high cost-effectiveness and is suitable for most industrial and commercial fields, such as logistics, warehousing, food processing, etc. Class C sensors are usually divided into multiple sub-levels, such as C1, C2, C3, etc., where C3 means that the maximum number of divisions of the sensor is 3000 and the accuracy is about 3/10,000 of the total range. Daysensors can reach C3 or even higher levels.

Class D: Class D is a weighing sensor with a lower accuracy level. Although its accuracy is lower, it can still be used in some occasions where accuracy is not required, such as some simple material weighing.

3. Accuracy is not the only indicator

In addition to the accuracy level, there are some other factors that affect the accuracy of weighing sensors. For example, environmental factors such as temperature, humidity, and vibration can affect the performance of the sensor. In addition, the installation, use, and maintenance of the sensor can also affect its accuracy.