Light Obscuration Particle Counter Fuel Contamination Limits
US Army TARDEC Warren United States
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The United States Army conducted a survey of over 1200 fuel samples with the objective of evaluating the proposed limits for use by automatic light obscuration particle counters for the monitoring of aviation fuel cleanliness. The laboratory data collected supports the proposed ISO code limit, based on ISO 4406, of 19171413 limits for the 4mc 6m c 14m c 30mc size channels. The proposed limits were derived from 1.0 mgL concentration levels for ISO12103-1 A1Ultrafine and ISO 12103-1 A2 Fine test dusts, and down to a 5 ppm free water contamination. Based on this work the Department of Defense Tri-Service Petroleum, Oil and Lubricants Technical Steering Committee has recommended these limits for inclusion into TableI of MIL-STD-3004.