Gas Ultrasonic Flowmeter BF70-2 Series Accuracy:?? Typically ± 1.0%, up to ± 0.5% Repeatability: typically ± 0.3%, ± 0.15% up to turndown ratio:? (40 to 350): 1? measuring the flow rate range: 0.03 ~ 60m / s diameter range:? DN15 ~ 5000mm for a variety of pipe material pipeline, plug-in sensor installation and maintenance of ultrasound with pressure sensitivity:? 100 x 10-12s Converter:? has two channel analog input interface, do the temperature, pressure and other parameters Working temperature:? converter -20 ~ 60 ℃ (specific environment please specify) sensor -40 ~ 120 ℃ (Std) -40 ~ 420 ℃ (high temperature)? Channel Type: Can menu channel, dual-channel, three-channel