EC-5 Soil Moisture Smart Sensor – S-SMC-M005 – Small area of influence

Measure soil water content with the affordably-priced EC-5 Soil Moisture Smart Sensor; this sensor integrates the field-proven ECH2O Sensor and a 12-bit A/D, providing +/- 3% accuracy in typical soil conditions, and +/- 2% accuracy with soil-specific calibration. The sensor’s two-tine design makes the sensor easy to install. Readings are provided directly in volumetric water content. This sensor’s high frequency design gives it a relatively low sensitivity to salinity and textural effects and a wide measurement range.

– Measures a 0.3 liter volume of soil
– Sensor uses a high-frequency (70 MHz) circuit that provides good accuracy even in high-salinity and sandy soils.
– Compatible with Onset standalone and web-based weather stations

Environment: The S-SMC-M005 Sensor is for use in Outdoor environments
Measurements: The S-SMC-M005 Sensor supports the following measurements : Soil moisture

Specifications

Measurement Range
In soil: 0 to 0.550 (m3/m3)
Extended range: -0.401 to 2.574 m3/m3 (full scale)
The sensor is capable of providing readings outside the standard volumetric water content range. This is helpful in diagnosing sensor operation and installation. See the Operation section below for more details.

Accuracy: +/- 0.031 m3/m3 (+/- 3%) typical 0 to 50 C (32 to 122 F); +/- 0.020 m3/m3 (+/- 2%) with soil specific calibration.
This is a system level accuracy specification and is comprised of the ECH2O probe’s accuracy of +/- 0.03 m3/m3 typical (+/- 0.02 m3/m3 soil specific) plus the smart sensor adapter accuracy of +/- 0.001 m3/m3 at 25 C (77 F). There are additional temperature accuracy deviations of +/- 0.003 m3/m3 / C maximum for the ECH2O probe across operating temperature environment, typical <0.001 m3/m3 /C. (The temperature dependence of the smart sensor adapter is negligible.)

Resolution: +/- 0.0007 m3/m3 (+/- 0.07%)

Soil Probe Dimensions: 89 x 15 x 1.5 mm (3.5 x 0.62 x 0.06 in.)

Weight: 180 grams (6.3 oz)

Decagon ECH2O Probe Part No.: EC-5

Sensor Operating Temperature: 0 to 50 C (32 to 122 F).
While the sensor probe and cable can safely operate at below-freezing temperatures (to -40 C/F) and up to 75 C (167 F), the soil moisture data collected at these extreme temperatures is outside of the sensor’s accurate measurement range.

Volume of Influence: 0.3 liter (10.1 oz)

Sensor Frequency: 70 MHz

Bits per Sample: 12

Number of Data Channels: 1
Note: A single smart sensor-compatible HOBO logger can accommodate 15 data channels and up to 100 m (328 ft) of smart sensor cable (the digital communications portion of the sensor cables)

Measurement Averaging Option: No

Cable Length Available: 5 m (16 ft)

Length of Smart Sensor Network Cable: 0.5 m (1.6 ft)