250-40561 MAS-1 Soil Moisture Sensor
250-40561 MAS-1 Soil Moisture Sensor

MAS-1 Soil Moisture Sensor with 4–20 mA Output

$353.00

Model: 250-40561

The 250-40561 MAS-1 Soil Moisture Sensor offers a standard 4-20 mA output that is common with PLCs, Irrigation controllers and Data Loggers. 5M (16ft)) Cable lenght is standard, custom cable length up to 250ft)

The MAS-1 determines volumetric water content (VWC) by measuring the dielectric constant of the media using capacitance/frequency domain technology. The sensor uses a 70 MHz frequency, which minimizes salinity and textural effects, making the MAS-1 accurate in almost any soil or soil-less media. Factory calibrations are included for mineral soils, potting soils, and rockwool.

The MAS-1 delivers research-grade accuracy at a price that makes large sensor networks economically practical. You can adequately characterize your site with sensors at multiple depths and locations, even if you're on a tight budget.

Shipping Time: 5 - 7 business days.

Model: 250-40561

The 250-40561 MAS-1 Soil Moisture Sensor offers a standard 4-20 mA output that is common with PLCs, Irrigation controllers and Data Loggers. 5M (16ft)) Cable lenght is standard, custom cable length up to 250ft)

The MAS-1 determines volumetric water content (VWC) by measuring the dielectric constant of the media using capacitance/frequency domain technology. The sensor uses a 70 MHz frequency, which minimizes salinity and textural effects, making the MAS-1 accurate in almost any soil or soil-less media. Factory calibrations are included for mineral soils, potting soils, and rockwool.

The MAS-1 delivers research-grade accuracy at a price that makes large sensor networks economically practical. You can adequately characterize your site with sensors at multiple depths and locations, even if you're on a tight budget.

Shipping Time: 5 - 7 business days.

MAS-1 Datasheet
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MAS-1 Soil Moisture Sensor Specifications

The MAS-1 Soil Moisture Sensor provides a standard 4–20 mA output for measuring volumetric water content in soil and soil-less media.

Specification Details
Sensor Type Volumetric Water Content (VWC)
Measurement Technology Capacitance / frequency domain technology using a 70 MHz frequency
Interface Standard 4–20 mA analog transmitter
Output Current 4–20 mA current proportional to volumetric water content
Supply Voltage 12–32 VDC continuous
Measurement Range 0–100% VWC typical
Accuracy ±6% VWC with generic calibration for supported growing media up to 65% VWC. Accuracy can be improved with medium-specific calibration.
Resolution Depends on the current measurement or data acquisition device
Sensor Measurement Interval 1 second
Settling Time 4 seconds
Operating Temperature -40°C to 60°C
Overvoltage Protection Yes
Wiring Red wire: positive supply (+)
Black wire: negative output (-)
Shield: not connected
Cable 2 m or 5 m, 3-wire cable. Custom cable lengths available upon request.
Maximum Cable Length Cable lengths over 250 feet are possible with the 4–20 mA interface
Dimensions 8.9 cm x 1.8 cm x 0.7 cm
Factory Calibrations Mineral soils, potting soils, and rockwool
Compatible Systems PLCs, irrigation controllers, data loggers, and analog monitoring systems
Application Note: The MAS-1 is well suited for soil moisture monitoring networks where multiple sensors are installed at different depths and locations for agriculture, irrigation, environmental research, and greenhouse applications.