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ti <br /> ECH2O Dielectric Aquameter is a low-cost sensor for measuring volumetric water content of soil. <br /> w-cost soil Moisture Monitoringco <br /> ON{ r EASURING OR MONITORING soil <br /> moisture content helps determine <br /> t010, k en to irrigate,how much water to <br /> '' erk <br /> N <br /> ply,depth of wetting,patterns of k , <br /> �� � <br /> _ r <br /> �� t soil moisture extraction by roots,and <br /> gi <br /> it moisture content with time.Soil <br /> e determines the transport and storage of <br /> lvJ- <br /> ed nutrients and pollutants and the availablity <br /> of 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 /> ECH20 is a capacitance probe that measures <br /> dielectric permittivity of the surrounding medium.In <br /> soil,dielectric permittivity is directly related to the a Lowes s tli i t wt, <br /> water content.The ECH2O probe outputs a voltage andternpei�rture <br /> proportional to the dielectric permittivity,and <br /> Very iow power <br /> therefore the water content of the soil. <br /> requirement. <br /> Easy Radio Data Collection FEATURES <br /> • The Em5 ECH2O—Logger and Em5R ECH2O Radio ■Easy to integrate <br /> Logger make low-cost soil moisture monitoring <br /> possible with highly precise,reliable data collection. s No knowledge of <br /> Em5/Em5R Loggers connect with up to five ECH2O RE necessary. <br /> Probes,store 140 days of data in non-volatile memory <br /> and are powered by off-the-shelf AAA batteries.The ■Simple networking <br /> Em5R Radio Logger is capable of up to 1.6km line-of- protocol. <br /> sight transmission with external antenna option.■ <br /> ■Reliable data transfer <br /> SPECIFICATONS <br /> Range Power requirement performance. <br /> Zero-to-saturated volumetric 2.5VDC @ 3mA. <br /> water content. ■Small&battery <br /> Operating temperature powered. <br /> Measurement time 0-50 C. <br /> 10ms. <br /> Dimensions <br /> Accuracy ECH2O-20: <br /> 3%typical. 1%with soil 25.4cm Lx3.2cm W 950 NE Nelson Court <br /> specific calibration. (10"L x 1.25"W) Pullman,Washington <br /> ECH2O-10: 99163 <br /> Resolution 12.2cm Lx3.2cm W <br /> 0.002 m/m. (6"Lx 1.25" W) <br /> s <br /> fax 509-332-5158 <br /> Output range Warranty ech2o@decagon.com <br /> ECH2O-20:375mv(dry soil) 1 year. www.ech2o.com <br /> • to 1000mV(saturated). <br /> ECH20-10:2OOrnV-76OmV <br /> Output voltages propor- <br /> tional <br /> ropor tional to volumetric water SIZF <br /> content. <br />