Aoya swelling degree tester is one of the commonly used coal testing equipment, and it is a special instrument for measuring the swelling degree index of bituminous coal.

Temperature control and graphic drawing are carried out by computer according to GB/T 5450-1997, and coal sample expansion curve is displayed in real time. 

Real-time display control temperature value, heating speed, working time and current opening. 

It can run online and control the coal assay process. 

It can automatically calculate softening temperature (T1), starting expansion temperature (T2), curing temperature (T3), maximum shrinkage (a), maximum expansion (b), print coal sample expansion curves and analysis reports. 

It can automatically save the relevant data of each test, and can query the coal analysis data at any time.