Measurement and Control Products for WEATHER Measurement and Control Products for WATER Measurement and Control Products for ENERGY Measurement and Control Products for MACHINES Measurement and Control Products for STRUCTURES Measurement and Control Products for EARTH
High Accuracy and Precision
Designed for long-term monitoring
Request a Quote
Ask a Question
Overview
 
Specifications
 
Compatibility
 
Ordering
 
Support
 
Image Gallery

Technical Description

The CS616 is comprised of two 30-cm-long stainless steel rods connected to the measurement electronics. The circuit board is encapsulated in epoxy, and a shielded four-conductor cable is connected to the circuit board to supply power, enable probe, and monitor the output.

The CS616 measures the volumetric water content of porous media (such as soil) using the time-domain  measurement method; a reflectometer (cable tester) such as the TDR100 is not required. This method consists of the CS616 generating an electromagnetic pulse. The elapsed travel time and pulse reflection are then measured and used to calculate soil volumetric water content.

Response Characteristics

The signal propagating along the parallel rods of the CS616 is attenuated by free ions in the soil solution and conductive constituents of the soil mineral fraction. In most applications, the attenuation is not enough to affect the CS616 response to changing water content, and the response is well described by the standard calibration. However, in soil with relatively high soil electrical conductivity levels, compacted soils, or soils with high clay content, the calibration should be adjusted for the specific medium. Guidance for making these adjustments is provided in the operating manual.

CS616-L Specifications

  • Probe-to-Probe Variability:
    ±0.5% VWC in dry soil, ±1.5% VWC in typical saturated soil
  • Accuracy:
    ±2.5% VWC using standard calibration with bulk electrical conductivity of ≤0.5 dS m-1, bulk density of ≤1.55 g cm-3, and measurement range of 0% VWC to 50% VWC
  • Precision: 0.05% VWC
  • Resolution: 0.1% VWC
  • Output: ±0.7 V square wave with frequency dependent on water content
  • Current Drain:
    65 mA @ 12 Vdc (when enabled);
    45 μA (quiescent typical)
  • Power Supply Voltage:
    5 Vdc minimum;
    18 Vdc maximum
  • Enable Voltage:
    4 Vdc minimum;
    18 Vdc maximum
  • Electromagnetic: CE compliant;
    meets EN61326 requirements for protection against electrostatic discharge
  • Rod Length: 300 mm (11.8 in.)
  • Rod Diameter: 3.2 mm (0.13 in.)
  • Rod Spacing: 32 mm (1.3 in.)
  • Probe Head Height:
    85 mm (3.3 in.)
  • Probe Head Width:
    63 mm (2.5 in.)
  • Probe Head Depth:
    18 mm (0.7 in.)
  • Weight without cable:
    280 g (9.9 oz.)
  • Cable Weight:
    35 g per m
    (0.38 oz. per ft)
Home \ Products \ Components \ Sensors \ Soil... \ CS616-L