... .Flow counter is composed of 8×4 characters liquid crystal display screen, single chip, RS232 communication port, signal receiving circuit, ... velocity measuring instruments in China.Function and CharacteristicsMeasuring Formula: V= +a (m/s)Range of Speed: 0.04-15.00 ( ... for 30 hours)Storage: Store 999 groups dataCommunication: RS232Clock: Can display year, month, day, hour, minute, and second The Error ...