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• Easy to operate: color large screen LCD display, Chinese interactive interface prompt operation, man-machine dialogue, strong operation logic;
• Split structure: measurement unit and display unit are separated; it is more hygienic, environmental protection and easy to operate;
• Long test life: the measurement system adopts "double air curtain" technology, which can better protect the optical system from the pollution of measurement exhaust gas; the detection room adopts constant temperature control to avoid the influence of water vapor condensation and temperature change on the measurement results;
• Measurement results: it has two kinds of display of opacity and light absorption coefficient, which is intuitive and convenient;
• Measurement function: it has free acceleration test measurement function and real-time detection function, and automatically process the measurement data and display the measurement results;
• Data security: internal storage of 50-200 groups of test data; can be viewed or printed at any time;
• Wide measurement range: wide measurement range of smoke, measurement of smoke and shading, smoke range from zero to full black (zero blackness means that there is no smoke and dust in the sample chamber, and full black means that the pipeline is completely blocked).
• Data printing: Bluetooth printer is optional to realize wireless printing (the default is wired micro printer);
• Power supply mode: AC and DC dual-purpose, when DC mode power supply is adopted, it can be directly connected to the on-board DC24 V battery.

Th-502 intelligent diesel engine smoke analyzer is used to test the smoke and dust emission content of the vehicle powered by diesel engine by using the split type opaque optical principle. The instrument is designed and manufactured according to the technical requirements of gb3847-2005 and HJ / t395-2007 compression ignition engine vehicle free acceleration method. The key parts are all imported parts with high measurement accuracy, good stability and long service life. They are the first choice for automobile manufacturers, automobile repair plants, vehicle monitoring centers and environmental protection monitoring units.