Qrv

Operation limited by excessive material buildup can prevent

TDR = Time Domain Reflectometry PDS = Phase Difference Sensors AS = in % of actual span E = Excellent F = Fair

FS = in % of full scale G = Good L = Limited P = Poor UL = Unlimited

TDR = Time Domain Reflectometry PDS = Phase Difference Sensors AS = in % of actual span E = Excellent F = Fair

FS = in % of full scale G = Good L = Limited P = Poor UL = Unlimited

FIG. 7.6.18 Optical or ultrasonic sludge level or interface switch. (Courtesy of Sensall Inc.)

FIG. 7.6.20 Detecting the thickness of the top layer.

FIG. 7.6.18 Optical or ultrasonic sludge level or interface switch. (Courtesy of Sensall Inc.)

FIG. 7.6.19 Ultrasonic interface level switch. (Courtesy of Sensall Inc.)
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