Clark Solutions' CSLFC ultrasonic flow transmitters are designed for water systems and green technology applications

Clark Solutions announces the availability of a line of ultrasonic flow transmitters for use in private and municipal water supply systems. These transmitters are well suited for measuring flow ranges from 15 to 700 GPM in ¾- to 10-inch pipe. Like all Clark Ultrasonic Flow Transmitters, Model CSLFC Transmitters feature no moving parts, long-term stability, no pressure drop and high accuracy. Built out of Schedule 40 carbon steel, CSLFC Transmitters feature ULTEM-encapsulated ultrasonic transducers with a choice of EPDM, Buna-N, Neoprene, FKM or other seals and epoxy-coated pipe body material. Clark Ultrasonic Flow Transmitter Model CSLFC provides a continuous 4-20mA flow signal. Available options include direction of flow capability, NEMA four- and eight- pin connector receptacles for simplified installation, and a DP/DS panel meter/display. 

At the heart of the Clark Ultrasonic Flow Transmitter is a proprietary mixed signal ASIC (Application Specific IC) that allows sophisticated timing, control and transducer drive circuitry to be combined on a single integrated circuit. Clark Ultrasonic Flow Transmitters utilize the “sing around” method, where the ultrasonic transducer alternates between transmitting and receiving to measure differences in flight time between upstream and downstream transmissions. The flight time of the sound pulse from the transmitting transducer to the receiving transducer will be shortened if the pulse is launched in the direction of flow, and increased if launched opposite to the direction of flow. By alternating the transmitting and receiving transducers, the difference in these transit times can be used to calculate the velocity of the flow, which, when multiplied by the area of the pipe, results in a measure of volumetric flow rate. The primary advantage of the sing around method is that the velocity of the fluid is being measured independent of the relative speed of sound in that given fluid. The output of Clark transmitters is also unaffected by changes in water temperature, density and viscosity.

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