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• • <br /> Veeder-Root Sensor Application Guide Appendix B <br /> Appendix B - How To Order An Oil/Water Separator Sensor (OWSS) <br /> Sensor Sizing <br /> To determine the correct sensor length for the oil/water separator tank application use the manufacturer's tank chart to <br /> determine height-to-volume thresholds for warning and alarm conditions and make three measurements, including <br /> verifying fluid depths on the manufacturer's tank chart. <br /> 1. Determining The Lowest Point Of The Bottom (Alarm) Float <br /> Measure and record the distance from inside the top of the tank to the maximum depth of waste oil/water interface in <br /> the tank as recommended by the tank's manufacturer(Fig.13-1). Subtract 3 inches from this measurement to deter- <br /> mine the lowest permissible point in the tank for the centerline of the sensor's bottom (alarm)float and note this <br /> measurement as D1. <br /> 7IT: <br /> 3"(7.6cm) <br /> D 1 14mimurn CL of the lowest point <br /> of Bottom(Alarm) <br /> Float(down position) <br /> The tank manufacturer's <br /> recommended magnum <br /> Oil/water interface depth <br /> Fig. B-1.- Determining Lowest Point For 01W Sensor's Bottom Float <br /> 2. Determining Distance From Top Of Riser To Top Of Tank <br /> Measure from the top of the riser down to the top of the tank and if using the riser reducing 4x2 fitting note this mea- <br /> surement as D2, OR, If using the riser reducing 4x2 coupling add 3"to the measured distance and note this mea- <br /> surement as D2 (Fig.13-2 <br /> If using a 4"to 2" <br /> reducing fitting <br /> riser adapter <br /> Top of O/W (example at right) <br /> T Sensor's riser no height adjust- <br /> to top of tank <br /> ment is needed to <br /> D2 measurement D2. <br /> If using a 4"to 2" <br /> reducing coupling <br /> riser adapter <br /> (example at right) <br /> add 3 inches to <br /> the results of <br /> measurement D2. <br /> Determining D <br /> B-1 <br />