The instrument is novel in design, compact in structure, small in size, light in weight and easy to carry;
The instrument is controlled by microcomputer program, the data is processed automatically, and the OLED screen is highlighted by Chinese dot matrix;
Chinese operation prompt function, touch key input, easy to operate;
DC power supply mode, equipped with high-performance lithium battery, the maximum continuous working time is up to 20 hours;
It can measure atmospheric pressure and temperature in real time;
It can store 20 groups of data. The embedded micro printer can print data in real time.

Th-j3 flow calibrator is a device developed to meet the calibration requirements of dust and dust samplers used in environmental detection. After calibration by the measurement department, the accuracy and consistency of the measurement value transmission can be ensured. It can be widely used in the field calibration of other instruments and meters with the same parameter dose range used in environmental detection, so as to ensure the measurement accuracy of the calibrated instruments and the comparability of the use results. It is stipulated that the sampling instrument should be calibrated periodically in use. This device is an ideal device to complete this work.