... accuracy of measurement.No obstacle parts in the meter tube so that no extra pressure loss; ... no movable parts, so meter has long service life.Short straight pipe required, ... electrode to prevent it from corrosion to ensure meter long operation life. MCU and SMT technology ... , OCT, external power∠35V DC, 250mA/max Power Supply: Single-phase 85 ~ 265V AC, 45 ~ 63Hz, power∠20W; 24V ...