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Belimo Releases New Ultrasonic Flow Sensors with Glycol Compensation
Danbury, CT, July 16, 2019 – Belimo releases new larger sizes inline flow sensors, 2½ to 6” that offer automatic glycol measurement and compensation for optimal system performance. Trusted flow measurement is essential in maximizing HVAC system efficiency and ensuring occupant comfort. Belimo flow sensors utilize ultrasonic technology with glycol compensation to provide accurate and repeatable flow measurements of water and water/glycol mixtures without drift in any HVAC application.
Belimo flow sensors use two offset transducers (refer to Figure 1) to
determine the flow velocity by measuring the speed of sound in the heat
transfer fluid. The downstream transit time is measured by passing an
ultrasonic pulse from the lower transducer to the upper transducer; the
process is then reversed to obtain the upstream time. Transit times
differ based on the flow through the sensor tube; the downstream pulse
is accelerated, the upstream pulse is impeded and slowed. The
ultrasound pulses with the fluid temperature can be used to calculate
the kinematic velocity (𝑣𝑚𝑒𝑎𝑠) and determine the measured
flow sensors have a patented automatic glycol compensation algorithm
that selects the correct fluid properties for the flow and energy
calculation eliminating manual input of glycol percentage for sensor
setup. The algorithm can be applied to a range of heat transfer fluids,
ensuring accurate and repeatable measurements. The automatic glycol
concentration minimizes drift and provides trusted flow measurement by
continuously compensating glycol concentration in a hydronic system.
The Belimo inline flow sensors are an advancement in thermal energy
with ultrasonic transit-time technology that automatically measures and
compensates glycol concentration. ‘Fit and forget’ sensors to
compensate variable and changing viscosities. The sensors have a rugged
design with no moving parts, require no calibration, and provide
accurate, repeatable measurements improving the control and efficiency
of HVAC systems. All flow sensors are wet calibrated to simulate field
operation and available with NIST traceable calibration certification.
The 2½” to 6” flow sensors now completes the FM series flow sensor
offering. The new sizes will be available in August.
is the global market leader in the development, production, and
marketing of field device solutions for controlling heating,
ventilation, and air conditioning systems. Actuators, control valves,
and sensors make up the company’s core business. Known for its
direct-coupled actuator and innovations in pressure independent control
valve technology, Belimo has solutions to maintain an efficient
building environment. For over 40 years, Belimo has provided
innovations in Comfort, Energy Efficiency and Safety Solutions to
customers throughout the world, all of which are backed by Belimo’s
unsurpassed 5-year warranty. For more information, contact Belimo
at 1-800-543-9038 or visit the website at www.belimo.us.
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