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Industrial Soil Moisture & Temperature & EC Sensor MODBUS-RTU RS485 (S-Soil MTEC-02B), with waterproof aviation connector

An IP68 RS485 Soil Moisture & Temperature & EC Sensor ranges - from 0% to 100% of saturation, -40℃ ~ +80℃, and 0 ~ 10000 μs/cm. Use in soil applications like Horticulture and Gardening. Use the sensor with SenseCAP Data Logger for seamless data collection and management.

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  • 10+: $79.00



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It monitors soil moisture, temperature, and soil EC, ranging from 0% to 100% of saturation, -40℃ ~ +80℃, and 0 ~ 10000 μs/cm, making it widely applicable in industrial environmental sensing scenarios.


We have two versions of Industrial Soil Moisture & Temperature & EC Sensor. The main difference is the cable connector. Please choose the version that best suits your needs:

(1)This one is with a waterproof aviation connector. It is compatible with SenseCAP Sensor Hub 4G Data Logger, which can collect various sensor data simultaneously and send them via 3G/4G LTE.

(2)Another version is with hook-up wires. It is compatible with SenseCAP LoRaWAN® Data Logger to connect with the LoRaWAN® network, enjoying the benefits of low-power and long-range communication.


  • High Performance: high accuracy, reliability, and stability
  • Universal Protocol: MODBUS-RTU RS485 
  • Compact Design: 3-in-1, soil moisture, temperature, and EC sensor
  • Wide-range Power Supply: Can be powered with supply voltage within 3.6V ~ 30V
  • Strong Robustness: Suitable to be immersed in soil, water, nutrient solution, and other substrates for a long time, anti-corrosion, automatic temperature compensation
  • Strong Anti-interference: made of flame-retardant epoxy resin


Soil electrical conductivity (EC) is the level of salts in soil (salinity). These parameters are vital indicators of soil fertility and health and ultimately affect the plants. When there is a high soil salinity, the salt will make it difficult for the plants to consume water even though there is a high moisture level in the soil. This situation will ultimately "burn" the plants. Plants grow best in their preferred environment, within the optimal ranges of soil moisture, temperature, and EC level. Growers need to have data on these parameters and understand what actions need to take to ensure plant health and higher yield.

This Soil Moisture & Temperature & EC Sensor MODBUS-RTU RS485 is designed with industry standards, featuring high precision, high sensitivity, and durability. Incorporating three sensors (soil moisture sensor, soil temperature sensor, and soil electrical conductivity) into one, and it comes with auto temperature compensation, this sensor ensures the accuracy of measurements regardless of the environmental changes.

By measuring the dielectric constant of the soil, it can stably measure the soil VWC (volumetric water content) regardless of various soil types. The measurement conforms to current international standards for soil moisture measurement.

The stainless steel probe can be permanently inserted into the soil with quick testing for long-term use. This soil sensor is IP68 rated, very robust and durable, and suitable to be applied for long-term monitoring of soil moisture, temperature, and electrical conductivity at scientific experiments, water-saving irrigation, gardening, greenhouses, outdoor farming, horticulture, golf turf management, forestry, precision agriculture, and other professional environmental monitoring scenarios. This sensor can also be used to measure EC levels in the water, nutrient solution, and other substrates.


Water-saving irrigation, Scientific Experiments, Greenhouse Management, Horticulture and Gardening, Golf turf Management, Grassland Management, Smart Agriculture, Soil Testing, Other Environmental Monitoring Scenarios


General Parameters
Product Model S-Temp&VWC&EC-02B
Interface RS-485
Protocol MODBUS-RTU RS485
Power Supply 3.6 ~ 30V DC
Current Consumption

6mA@24V DC

(quiescent dissipation)

Operating Temperature -40℃ ~ +85℃
Probe Material Anti-corrosion special electrode
Sealing Material Black flame-retardant epoxy resin
IP Rating IP68
Cable Length 5 meters
Installation All buried or probe into the media to be measured
Device Weight 210g
Soil Temperature
Range -40℃ ~ +80℃
Accuracy ± 0.5 ℃
Resolution 0.1℃
Soil Moisture

From completely dry to fully saturated

(from 0% to 100% of saturation)


±2% (0~50%)

±3% (50~100%)


0.03% (0~50%)

1% (50~100%)

Electrical Conductivity 
Range 0 ~ 10000 μs/cm
Accuracy ± 3%
Resolution 10 μs/cm
Temperature Compensation

Built-in temperature compensation sensor,

Range: 0-50°C


Wiring Diagram



Note: Please refer to the user manual for more details about the wiring diagram.




Q:    What exactly is soil moisture measured?
A: Measured is soil volumetric water content, soil volumetric water content %= soil volumetric water content * bulk density


Q:    How is soil volume water content measured?
A: By measuring the dielectric constant, and then through a certain calculation formula to convert into soil volume water content.


Q:    Why does the measured volume water content of soil not reach 100% in water?

First of all, the saturated water content of the soil is about 60%, and the measurement of higher water content is not of practical significance.

Second, we need to pay attention to the test environment and method when testing.

7*7*7cm square column range measured by the sensor probe. If water is used for the test, a container of at least 20*20*20cm is required, and the probe is placed in the middle (with water to immerse the probe).

The resulting value will be between 80% and 100%.


Q:       How to install a soil sensor probe?

Dig a vertical hole, insert the sensor steel needle into the hole to be measured, and then compacted the pit to ensure that the steel needle is in close contact with the soil.





Is the conductivity affected by the soil moisture?


The EC value can be continuously monitored in the field, mainly by measuring Bulk EC value, which is related to soil water content. If there is no water or little water content, the ions in the soil cannot dissolve in the water, and conductivity will be low.




HSCODE 9025800090
USHSCODE 9026104000
EUHSCODE 8517180000
RoHS 1



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