From production to market launch, a sensor must inevitably go through a stage called calibration. Only a sensor that passes the calibration test is considered a truly qualified sensor. This is because a sensor converts other measured information into electrical signals or other required forms of information according to certain rules, such as a dust sensor detecting PM2.5 concentration in the air. Therefore, consistency of results is very important. Only through calibration can it be guaranteed that the output consistency of the sensor is qualified.

A sensor is a common yet very important component; it is a device or apparatus that senses a specified measured quantity and converts it into a useful signal according to certain rules. For sensors, inputs can be divided into static and dynamic quantities based on the input state. We can obtain the static characteristics of a sensor according to the relationship between the output and input in a stable state at various values. The main indicators of a sensor's static characteristics include linearity, hysteresis, repeatability, sensitivity, and accuracy.

The dynamic characteristics of a sensor refer to the response characteristics to an input quantity that changes over time. Dynamic characteristics are usually described using automatic control models such as transfer functions. Typically, the signals received by sensors are weak low-frequency signals, and the amplitude of external interference can sometimes exceed the measured signal. Therefore, only a calibrated sensor can confirm whether its output signal is normal.

Application areas for Luftmy PM2.5 sensors: air purifiers, air conditioners with purification functions, PM2.5 detectors, range hoods, smoke alarms, fresh air systems, specialized PM2.5 sensors, air detectors, etc.