News D-Flow Products Components Applications Liquid flow Gas flow Level Analysis Download PDF Technology Download Sitemap Contact The D-Flow UFO ASIC and our piezo-based transducers are the basis for our liquid flow technology. The technology applies to any pure liquid. D-Flow has developed evaluation platforms for hot and cold water distribution, district heating, gasoline and other applications in capacities from DN 10 up to DN 80. The D-Flow UFO ASIC handles two pairs of transducers for dual-path solutions. Multi-path solutions can be achieved by using more than one ASIC on the same electronics board. Typical performance of water flow meters based on D-Flow technology is displayed below. The performance has been validated in water at temperatures between 15 and 80°C. D-Flow liquid flow platforms comply with the uncertainty statements of the district heating specification EN 1434. All uncertainty statements are made with a 95 % confidence level. Zero flow stability: ± 1 mm/s. Maximum flow velocity: ~15 m/s. Repeatability: ± 0.25%. Total accuracy: < ± 1% of measured value in a range of 1:50. Total accuracy: < ± 2% of measured value in a range of 1:100. Total accuracy: < ± 5% of measured value in a range of 1:300.