Trusted Flow Measurement. Ultrasonic Flow Sensors with Glycol Compensation Trusted flow measurement is essential in maximizing HVAC system efficiency and ensuring occupant comfort. Belimo's new flow sensor utilizes ultrasonic technology with glycol compensation to provide accurate and repeatable flow measurements of water and water/glycol mixtures without drift in any HVAC application. Discover the advantages www.belimo.ushttp://www.belimo.us