Soil moisture and soil temperature : SMT100
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Soil moisture and soil temperature : SMT100

The SMT100 soil sensor allows for easy, inexpensive soil moisture and temperature measurements. This device enables both the precise analysis of the soil water balance and the determination of plant soil water availability. 

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The SMT100 soil sensor allows for easy, inexpensive soil moisture and temperature measurements. This device enables both the precise analysis of the soil water balance and the determination of plant soil water availability. The SMT100’s integrated temperature sensor additionally provides important data on ground temperature. The device’s numerous applications range from data collection for scientific purposes to irrigation control in commercial agriculture and horticulture.

Through its special design and optimized measuring principle, the SMT100 combines the advantages of low-cost FDR sensors with the accuracy of TDR measurements. Where other soil moisture sensors reach their limits, the high operation frequency (> 100 MHz) as used in SMT 100 measurements allows allow this sensor to take reliable measurements even in dense clay soils. Further advantages include the short measuring time, a low sensitivity to salinity, and a large measuring range. Sensor and cable are maintenance-free, waterproof and frost-resistant. The SMT100 is therefore ideal for continuous operation.

The compact, functional and robust design of the glass-fiber reinforced, blade-shaped sensors enable simple installation for permanent measurements or easy insertion into the soil for manual point measurements with handset. Variants with different communication protocols (RS-485, SDI-12) as well as a version with analogue output are also available.

Advantages

  • Accurate determination of soil water content
  • Integrated temperature measurement
  • Suitable for every soil type
  • Easy installation (ongoing measurement) and insertion (manual measurement with handset) into soil
  • Cost-effective
  • Compatible with almost every logger system (interface options: Analogue Volt Signal, RS-485, SDI-12)

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