... impulse,RS485 outputs. 3.delivery:5days calibrator SBL digital target gas flowmeter calibrator1 Intruduction 1) Category and applications Based ... -impurity, portability and reliability, they have been widely used in many fields of petroleum, chemical industry, energy, foodstuff, ... liquid, gas, steam, ropy mediums or ambulatory mediums in low, normal or high temperature condition.l Total quantity ...