... Flow counter is composed of 8×4 characters liquid crystal display screen, single chip, RS232 communication port, signal receiving ... ×4 character liquid crystal displayMeasuring Methods: WiredTemperature Range: -10°C-45°CPower Consumption: <30mAPower Supply: DC 5V (with 1600mA ... 30 hours)Storage: Store 999 groups dataCommunication: RS232Clock: Can display year, month, day, hour, minute, and second The ...