JW-S3S(Z11) Soil Moisture EC Sensor is designed for accurate monitoring of soil volumetric water content, electrical conductivity, and temperature. With optional 0–2V analog output or RS485 Modbus-RTU communication, IP68 waterproof protection, FDR soil moisture measurement, and corrosion resistant electrodes, it is ideal for smart irrigation, greenhouse monitoring, salinity management, fertigation, soil research, and precision agriculture.
2. Product Overview
The Soil Moisture EC Sensor is a multi parameter soil monitoring probe for measuring soil volumetric water content, electrical conductivity, and temperature. It is designed to help growers, researchers, and smart agriculture system integrators monitor soil water status, salinity accumulation, nutrient solution conductivity, and root zone temperature.
Soil electrical conductivity is an important indicator for soluble salt concentration. High soil EC can indicate salt stress, over fertilization, poor drainage, or secondary salinization. By combining soil moisture, EC, and temperature data, this sensor helps users make better decisions for irrigation scheduling, fertilizer management, salinity control, and crop growth optimization.
The sensor can be used in farmland, greenhouses, orchards, nurseries, pasture, soil research plots, fertigation systems, nutrient solutions, and substrate or culture media monitoring.
Parameter
Model No.
JW-S3S(Z11)
Product Type
Soil moisture EC temperature sensor
Measurement Parameters
Soil moisture, EC, teperature
Extended Parameters
Salinity, TDS, dielectric constant
Soil Moisture Principle
FDR method
EC Measurement Principle
AC bridge method
Output Options
0–2V voltage output or RS485 Modbus-RTU
Power Supply
3.9–30V DC
Static Power Consumption
6 mA at 24V DC
Soil Moisture Range
Optional 0–50% or 0–100%
Moisture Resolution
0.03% from 0–50%, 1% from 50–100%
Moisture Accuracy
±2% from 0–50%, ±3% from 50–100%
EC Range
0–5000 μS/cm, 0–10000 μS/cm, or 0–20000 μS/cm
EC Resolution
10 μS/cm from 0–10000 μS/cm, 50 μS/cm from 10000–20000 μS/cm
EC Accuracy
±3% from 0–10000 μS/cm, ±5% from 10000–20000 μS/cm
EC Temperature Compensation
Built in, 0–50°C
Temperature Range
-40–80°C
Temperature Resolution
0.1°C
Temperature Accuracy
±0.5°C
Operating Environment
-40–85°C
Protection Rating
IP68
Probe Material
Corrosion resistant special electrode
Sealing Material
Black flame retardant epoxy resin
Installation Method
Fully buried or probes fully inserted into measured medium
Standard Cable Length
2 m
Cable Customization
Available on request
Connection Method
Pre installed cold pressed terminal
Dimensions
35 × 11 × 111 mm
Electrode Length
51 mm
3. Dimension
4. Output Options and Communication
The Soil Moisture EC Temperature Sensor supports flexible output options for different agricultural monitoring and irrigation control systems. It can be configured with 0–2V analog voltage output or RS485 Modbus-RTU digital communication, depending on the project requirements.
5. Application Scenarios
Smart Irrigation
The sensor provides real time soil moisture and EC data to help determine irrigation timing, irrigation amount, and soil salinity changes.
Greenhouse Monitoring
Suitable for greenhouse vegetables, flowers, seedlings, herbs, potted plants, and controlled environment agriculture.
Soil Salinity Monitoring
Helps monitor salt accumulation, salt leaching effects, and salinity stress in agricultural soils.
Fertigation Management
Can be used to monitor conductivity changes caused by fertilizer application, helping prevent over fertilization and root zone salt stress.
Precision Agriculture
Suitable for IoT based soil monitoring networks, field data collection, and crop growth decision support.
Scientific Research
Useful for soil water and salt dynamics, salinized soil improvement, irrigation experiments, and plant growth studies.
Nutrient Solution and Substrate Monitoring
The sensor can also be used for water fertilizer integrated solutions, nutrient solutions, and growing media conductivity monitoring.
6.Installation and Measurement
For accurate EC measurement, soil volumetric water content should preferably be above about 20%, because soluble ions in the soil need sufficient moisture to reflect actual electrical conductivity. Long term monitoring data after irrigation or rainfall is usually closer to the real soil condition.
For quick measurement, select a proper measuring location, avoid stones and hard objects, insert the probe vertically into the soil, and ensure close contact between the electrodes and the soil. Do not shake the sensor during insertion.
For buried installation, dig a vertical pit according to the required depth, insert the probe horizontally into the pit wall, refill and compact the soil, then allow the sensor to stabilize before continuous monitoring.
In hard soil, pre-drilling is recommended. Avoid strong vibration, impact, or hitting the sensor with hard tools.
FAQ
Q
1. What does this soil sensor measure?
A
It measures soil moisture, electrical conductivity, and temperature. Through RS485 Modbus registers, it can also provide salinity, TDS, and dielectric constant data.
Q
2. What output options are available?
A
The sensor supports 0–2V analog voltage output and RS485 Modbus-RTU digital output. Custom output options can also be provided for project requirements.
Q
3. Can it be used for smart irrigation?
A
Yes. Soil moisture data helps control irrigation timing, while EC data helps monitor fertilizer concentration and salt accumulation.
Q
4. Can JW-IoT integrate this sensor into a greenhouse monitoring system?
A
Yes. JW-IoT can integrate this soil moisture EC sensor with RTUs, irrigation controllers, LoRaWAN nodes, 4G gateways, cloud dashboards, and mobile apps.
Q
5. What is the EC measurement range?
A
The sensor supports optional EC ranges of 0–5000 μS/cm, 0–10000 μS/cm, and 0–20000 μS/cm.
Q
6. Is the sensor waterproof?
A
Yes. The sensor has an IP68 protection rating and can be used for long term buried monitoring or immersed applications.
Q
7. Can it be used in fertigation systems?
A
Yes. The sensor can be used to monitor water fertilizer integrated solutions, nutrient solutions, and soil conductivity changes after fertilization.
Q
8. Can JW-IoT provide a complete smart irrigation solution with this sensor?
A
Yes. JW-IoT can provide a complete solution including soil sensors, data loggers, gateways, cloud platforms, dashboards, alarms, and irrigation control integration.
Q
9. Why is soil EC important?
A
Soil EC reflects soluble salt concentration. High EC may indicate salt stress, over fertilization, poor drainage, or salinity accumulation, which can affect root water uptake and crop growth.
Q
10. What is the temperature measurement range?
A
The sensor measures temperature from -40°C to 80°C, with 0.1°C resolution and ±0.5°C accuracy.
Q
11. Can JW-IoT customize cable length?
A
Yes. JW-IoT can provide customized cable lengths according to field, greenhouse, orchard, or research installation requirements.
Q
12. Why should soil moisture be above 20% for EC measurement?
A
Because the sensor measures soluble ions in the soil. When the soil is too dry, soluble ions cannot fully reflect actual soil conductivity. Measurements after irrigation or rainfall are usually more representative.
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