29 Visit the website for more information about the components. Transmitters and Primary Flow Elements Flow, Level 1 Orifice Plate Flow measurement device using the Venturi effect to produce a pressure drop from which the flow rate can be inferred. This primary element consists of a thin metal plate with a sharp-edged upstream aperture (orifice) inserted between two flanges at the location where the flow must be determined. β ratio: 0.55, 0.65, 0.75. Provided with three different plates. It requires the use of a differential-pressure transmitter to transform the pressure drop into a usable flow rate value. Order no. 588315 2 Orifice Plate (Air) Flow measurement device designed for air applications. It uses the Venturi effect to produce a pressure drop from which the flow rate can be inferred. This primary element consists of an orifice precisely machined in a brass tube. It requires the use of a differential-pressure transmitter to directly convert the pressure drop into a usable flow rate value. Order no. 582404 3 Venturi Tube Flow measurement device that relies on the Venturi effect to produce a pressure drop from which the flow rate can be inferred. This apparatus provides a clear picture of the phenomena and offers a low permanent pressure-loss. It requires the use of a differential-pressure transmitter to transform the pressure drop into a usable flow. Order no. 582403 4 Rotameter Variable area flow meter calibrated to measure the flow of water in the process loop. It provides a direct visual reading of the flow rate by observing the position of the float inside the transparent graduated tube. Order no. 582402 5 Rotameter (Air) Variable area flow meter specifically calibrated to measure the air flow in a compressed air setup. It provides a direct visual reading of the flow by simply observing the position of a float inside the transparent graduated tube. Order no. 582405 6 Conductivity Level Switch Level limit switch made of three probe rods of different lengths. When two of the probe rods come in contact with the conductive liquid, a measurable current flows between the two rods which allows the student to detect that a certain level has been reached. The three-rod configuration allows the detection and the monitoring of a low and a high level of liquid in the column of the Pressure, Flow, Level, and Temperature Process Learning Systems. With two output relays. Recommended learning material, also order: “Pressure and Level Switches” → Page 165 Order no. 588346 7 Float Switch Level limit switch triggered when a float is raised by buoyancy forces as the level of liquid in the column reaches the float. The device has one contact which can be configured to be either normally closed or normally open. Its length can also be adjusted to accommodate the detection of different levels. Recommended learning material, also order: “Pressure and Level Switches” → Page 165 Order no. 588348 Industrial Instrumentation and Process Control > Components 1 2 3 4 5 6 7
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