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ECH2O Dielectric Aquameter is a low-cost sensor for measuring volumetric water content o <br />EASURING OR MONITORING soil <br />moisture content helps determine <br />hien to irrigate, how much water to <br />{apply, depth of wetting, patterns of <br />soil moisture extraction by roots, and <br />moisture content with time. Soil <br />Ttie a of determines the transport and storage �- P g <br />zts;olved nutrients and pollutants and the availablity <br />bf water to plants. ECH2O soil moisture sensors are <br />economical enough to provide information you need, <br />where and when you need it. <br />Soil Water Content <br />ECH2O is a capacitance probe that measures <br />dielectric permittivity of the surrounding medium. In <br />soil, dielectric permittivity is directly related to the <br />water content. The ECH2O probe outputs a voltage <br />proportional to the dielectric permittivity, and <br />therefore the water content of the soil. <br />Easy Radio Data Collection <br />The Em5 ECH2O— Logger and Em5R ECH2O Radio <br />toLogger make low-cost soil moisture monitoring <br />possible with highly precise, reliable data collection. <br />Em5/Em5R Loggers connect with up to five ECH2O <br />Probes, store 140 days of data in non-volatile memory <br />and are powered by off-the-shelf AAA batteries. The <br />Em5R Radio Logger is capable of up to 1.6km line -of - <br />sight transmission with external antenna option. 0 <br />SPEClFlCATONS <br />Range Power requirement <br />Zero -to -saturated volumetric 2.5VDC@3mA. <br />water content. <br />Operating temperature <br />Measurementtime 0-50i:"C. <br />10ms. <br />950 NE Nelson Court <br />Pullman, Washington <br />99163 <br />fax 509-332-5158 <br />ech2o@decagon.com <br />www.ech2o.com <br />ACTUAL <br />SIZE <br />Dimensions <br />Accuracy <br />ECH2O-20: <br />13% typical.: 1% with soil <br />25.4cm Lx3.2cm W <br />specific calibration. <br />(10" L x 1.25 " W) <br />ECH20-10: <br />Resolution <br />12.2cm Lx 3.2cm W <br />0.002 m/ m. <br />(6 " L x 1.25 " W) <br />Output range <br />Warranty <br />ECH2O-20: 375mv (dry soil) <br />1 year. <br />to 1000mV (saturated), <br />ECH20-10: 200m V - 76Om V <br />Output voltages propor- <br />tional to volumetric water <br />content. <br />950 NE Nelson Court <br />Pullman, Washington <br />99163 <br />fax 509-332-5158 <br />ech2o@decagon.com <br />www.ech2o.com <br />ACTUAL <br />SIZE <br />