Meters can be placed within the pipe or clamped to its exterior surface. Combined with pipe diameter, this information is used to calculate flow volume. The difference in transit time of the upstream and downstream waves is proportional to the velocity of the fluid. ![]() Waves are emitted both with and against fluid flow. These devices consist of a pair of transducers which emit and receive ultrasonic impulses. Such instruments are able to measure the flow of liquids and gases in a pipe. Pulse Outputs to Control System 24 Vac/dc POWER FAN COIL UNIT OR AIR HANDLING UNIT CHILLED WATER RETURN CHILLED WATER SUPPLY RETURN TEMP OUTPUT / POWER SYSTEM-40 Made in USA BTU METER KBTU/HR 385. ![]() TYPICAL SYSTEM-40 INSTALLATION (Meter may be installed in supply or return.) GENERAL SPECIFICATIONS.
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