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HISTORY/GENERAL USES <br />Soil Water Samplers had their origin back in 1961 when we coop- <br />erated with Dr George H. Wagner at the University of Missouri to <br />manufacture a porous ceramic cup for collecting soil water samples. <br />The outgrowth of this work was our first commercial Soil Water <br />Sampler, Model 1900 Soil Water Sampler Since that time, these <br />samplers have been generally accepted as an ideal tool for in situ <br />collection of soil water samples for a great variety of soil moisture <br />monitoring work. <br />The initial and most extensive use of these Samplers was made by <br />Pennsylvania State University, largely under the direction of Dr. <br />L. T. Kardos and others, on the Pennsylvania Waste Water Project. <br />Modifications of the original 1900 Soil Water Sampler by Richard <br />R. Parizek and Burke E. Lane at Pennsylvania State University, <br />reported on in the Journal of Hydrology, produced apressure- <br />vacuum type unit. Since that time, we have made available com- <br />mercially the Model 1920 Pressure-Vacuum Soil Water Sampler. <br />Some of our Soil Water Samplers have been in continuous use for <br />several years and still yield satisfactory soil moisture samples. <br />All of our ceramics are made from formulations which contain vari- <br />ous proportions of kaolin, talc, alumina, ball clay, and other felds- <br />pathic materials, using proprietary formulas developed through <br />research and experience accumulated over more than 4 decades. <br />Our samplers find applications not only in research work such as <br />quantitative chemical analysis of soil water, but also for pollution <br />control purposes in monitoring moisture under sanitary landfills, <br />irrigated areas with wastewater, and areas where reclaimed or <br />recycled water is used on a routine basis to assure compliance with <br />government standards. <br />Soilmoisture's line of Soil Water Samplers has proven to be an <br />excellent and reliable means for obtaining soil water samples from <br />both saturated and unsaturated soils at depths ranging up to sev- <br />eral hundred feet. <br />SOILMOISTURE EQUIPMENT CORP. 3 ^® <br />P.O. Box 30025, Sonto Borbaro, Colifornio 93105 USA / \ <br />Phone: (805) 964-3525 • Pox: (805) 683-2189 SOIEMOISTURE <br />e-moil: solesQsoilmoisture.com ~ Web: http: //wwwsoilmoisture.<om <br />