Equitensiometer type EQ2

 
  • 0 to -1000 kPa 
  • No maintenance 
  • Simple data logger connection
  • No frost damage 

    •  
     

    The Equitensiometer is an innovative, maintenance-free sensor for measuring soil matric potential. 
     

       Introduction

    		  
    The Equitensiometer type EQ2 provides a new technique for measuring soil water potential (soil matric potential). The EQ2 makes clever use of the latest generation of soil moisture sensor, the ThetaProbe, to derive accurate readings without the familiar problems of water-filled tensiometers.

    The sensor comprises a ThetaProbe embedded into a specially formulated porous matric material. The water content of this material rapidly reaches equilibrium with the matric potential of the surrounding soil, and the absorbed water is detected by the ThetaProbe. The EQ2 is delivered pre-calibrated.

     Applications

     Being maintenance free, (i.e. no refilling, degassing or topping up is required) and low power, the EQ2 can be conveniently used at remote sites. It is not harmed by frost, nor by long term burial.

    The EQ2 achieves best accuracy (± 5% of reading) over the range -100 to -1000 kPa. This makes it well suited to plant water stress studies - even in very dry soils. (Accuracy from 0 to -100 kPa is ± 10 kPa).

    Extension Tubes can be used to position EQ2s at depth.

      

    Delta-T's new catalogue:   covering:
    Soil Water Content: ThetaProbe -   introduction ;   performance ;   theory
    Soil Water Potential:     Tensiometer ;   Equitensiometer
    Pore water conductivity:     Sigmaprobe     theory
    Evapotranspiration:     (Software and weather stations)
    Data loggers and readout units ;   Application examples ;      


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    © Bruce Metelerkamp

    www.sowacs.com/feature/deltat/swp-eq2.html
    last update : 14 August 1999