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7XF-E Datasheet(PDF) 4 Page - Magnetrol International, Inc. |
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7XF-E Datasheet(HTML) 4 Page - Magnetrol International, Inc. |
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4 / 8 page  clipse transmitters utilize Guided Wave Radar (GWR) technology for unsurpassed accuracy and reliability in monitoring both liquid and bulk solid levels. Though GWR technology was first employed for the detection of underground cable breaks as early as the 1930s, Magnetrol pioneered its use for liquid level measurement with the introduction of the Eclipse Model 705 transmitter in 1998. No other level measure- ment technology has captured the atten- tion of the process control industry the way Eclipse has. P Prriin nc ciip plle e o off O Op pe erra attiio on n Guided Wave Radar functions accord- ing to the principle of Time Domain Reflectometry (TDR). As shown at left, a generated pulse of electromagnetic energy travels down the probe. Upon reaching the liquid surface the pulse is reflected. Sophisticated circuitry captures these sig- nals in real time (nanoseconds) and reconstructs them in equivalent time (milliseconds) to make level measurement a practical reality. Unlike conventional radar, which launches its signal into free air, Eclipse launches its signal within the sealed path of its probe (wave guide) which is in direct contact with the process media. This direct contact makes the signal less vulnerable to distortion brought on by process conditions that might thwart through-air technologies. Eclipse transmitters have also been designed for easy setup and configura- tion. A compact instrument that is easy to handle and install, Eclipse’s innovative housing makes measurement data easy to read. 4 E An Introduction To Eclipse Guided Wave Radar Eclipse transmitters generate pulses of electromagnetic energy that are transmitted down the probe, or wave- guide. When they reach a liquid surface that has a higher dielec- tric than the air or vapor in which they travel, the pulses are reflected. The pulses’ transit time to and from the surface is meas- ured, converted to distance, then dis- played on the LCD as a level reading. HOW GUIDED WAVE RADAR WORKS Pulses Generated Pulses Reflected Time Converted to Distance |
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