1.With GPRS wireless module 2.Long-term stability 3.Low flow rate measurement ... output)Data interface (Optional)RS232,RS485,M-Bus,ModBus, and GPRS wireless module Data loggerMaintains data history (i.e. totalizer values, working ... output options (i.e. 4~20mA, RS232/485, ModBus, OCT, GPRS wireless module).Velocity range0.01~12.00m/sAmbient temperature limit0°C ...