Soil moisture / temperature SMT100 Technical Specifications Sensor model name Scope of application Suitable for ECOMATIK GmbH Muenchner Str. 23 D-85221 Dachau/Germany Tel.: +49 8131 260 738 Fax: +49 8131 260 736 e-mail: [email protected] website: www.ecomatik.de Soil moisture and soil temperature sensor Type SMT100 For continuous (permanent installation in soil) or manual (consecutive insertion at different locations) measurements of the volumetric water content of the soil (SWC). all soil types Special feature: read out of additionally information possible: »Raw data, dielectric permittivity Special feature / limitation Measurement range Limitation: Use for manual point measurements in highly abrasive technosols is not recommended. SWC: 0 to 60% volumetric water content (up to 100% volumetric water content with restricted accuracy) Temperature: Temperature: -40 to + 80 ° C (analog version -40 to + 60 ° C) 0.1% SWC 0.01 ° C (analog version 0.2 ° C) Volumetric water content (SWC) - at factory calibration up to ± 3% (SWC) in mineral soil types with medium salinity of 0 to 50% VW - for soil-specific calibration up to ± 1% (SWC) Temperature - typical ± 0.2 ° C, max. ± 0.4 °C over the entire measuring range (analog version ± 0.8 °C) All data loggers with suitable power supply and RS485 Logger requirements and sensor Interface (TBus, Modbus, ASCII), SDI-12 or output signal Analog input 0 - 10 V (other voltage ranges on request) 4-24 V DC, up to 40 mA peak during the measurement (Analog version 12 - 24 V DC for 0 - 10 V output signal) Power supply Measuring time digital versions: less than 50 ms Measuring time analog versions: less than 500 ms Operational conditions Air temperature: -25 to 70 ° C, air humidity: 0 to 100% Size & Weight (only sensor) 18.2 cm x 3 cm x 1.2 cm; about 80 g without cable Sensor cable length 10 m, can be extended on request