Abstract: In view of the status of coal pipeline gas flowmeter,comparing and analyzing the common pipeline gas flowmeter,the new loop self-oscillating type flow measurement technology is introduced.Based on loop self-oscillating flow measurement technology,CGWZ-100 loop self-oscillating flowmeter has been applied widely in gas flow monitoring of underground drilling filed gas drainage and the coal mine gas CDM measure monitoring system.With advantages of stable performance,accurate and reliable determination data,without loss of resistance,dustproof and waterproof,CGWZ-100 loop self-oscillating flowmeter is an excellent performance and reliable work flow measuring apparatus,and has high application value.