We provide our clients with compact type "all-in-one" air flow tester, the features are as follows: features: full dot led screen with back light displays numerous information basic set-up function allows easy setting bar graph can hold up to 1000 data. Compensation sampling data graph is also included, useful for quality control wide flow range from f.s.500ml/min to 100l/min and traceability available mass flow sensor used for flow sensor.