METER TEROS 54 - System; Measurement Specifications

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SYSTEM
3. SYSTEM
This section describes the specifications, components, and theory of the TEROS 54.
3.1 SPECIFICATIONS
MEASUREMENT SPECIFICATIONS
Volumetric Water Content (VWC)
Range
Mineral soil
calibration
0.00−0.70 m
3
/m
3
Apparent
dielectric
permittivity (ε
α
)
1–50 (soil range)
1 (air) to 80 (water)
NOTE: The VWC range is dependent on the media the sensor is calibrated to. A custom calibration will
accommondate the necessary ranges for most substrates.
Resolution 0.001 m
3
/m
3
Accuracy
Generic
calibration
±0.05 m
3
/m
3
typical in mineral soils that have solution EC < 8 dS/m
Medium specific
calibration
±0.02–0.03 m
3
/m
3
in any porous medium
Apparent
dielectric
permittivity (ε
α
)
1–40 (soil range), ±1 (ε
α
) (unitless)
40–80, 15% of measurement
Dielectric Measurement Frequency
70 MHz
Temperature
Range –20 to +60 °C
Resolution 0.03 °C
Accuracy ±0.35 °C from –20°C to 0 °C
±0.25 °C from 0°C to 60 °C