30MHz Substrate moisture sensor

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Description

Monitor VWC, EC and temperature

Measure the water content, electrical conductivity, and temperature of many types of growing media, primarily in greenhouse applications.

This sensor was designed to measure the water content, electrical conductivity, and temperature of many types of growing media, primarily in greenhouse applications where the slim, stainless steel needles could be inserted easily into a variety of substrates.

Using real-time data from soil sensors, farmers can adjust and tailor a granular approach to irrigation and nutrient delivery. Custom alerts can provide insights on which crops are in need of irrigation, and which are in need of drainage to prevent the damaging effects of overwatering including standing water compromising root development, overaccumulation of salts, root rot, fungus and mildew.

Substrate moisture sensor

Measure the water content, electrical conductivity, and temperature of many types of growing media, primarily in greenhouse applications.

Specifications

VOLUMETRIC WATER CONTENT

Accuracy: Ea: +/-1 Ea (unitless) from 1 to 40 (soil range), +/-15% from 40 to 80:

Using a generic calibration: +/-0.03 m3 (+/- 3% VWC) typical in mineral soils that have solution electrical conductivity < 5 dS/m

Using medium specic calibration, +/- 0.01 to 0.02 m3 ( +/-1 to 2% VWC) in any porous medium

Resolution:

Ea: 0.1 Ea (unitless) from 1 to 20
< 0.75 “a (unitless) from 20 to 80
0.002 m3 (0.2% VWC) from 0 to 40% VWC
0.001 m3 (0.1% VWC) > 40% VWC

Range: Apparent dielectric permittivity (Ea): 1 (air) to 80 (water)

BULK ELECTRICAL CONDUCTIVITY

Accuracy: +/- 5% from 0 to 5 dS/m, +/-10% from 5 to 23 dS/m
Resolution: 0.001 dS/m from 0 to 23 dS/m
Range: 0 to 25 dS/m (bulk)

TEMPERATURE

Accuracy: +/- 1 ℃
Resolution: 0.1 ℃
Range: -40 to 60 ℃