In the air-conditioning laboratory, when measuring the cooling capacity (or heating capacity) of the water side of the water machine, the inlet and outlet water temperature and water flow rate of the prototype are usually measured, and then the cooling capacity (or heating capacity) is calculated. The water flow here is basically measured with an electromagnetic flow meter.

GMF400 Insertion electromagnetic flow meter​ is composed of insertion electromagnetic sensor and electromagnetic flow converter, used to measure the conductive liquid that electrical conductivity is greater than 5 us/cm