Modbus buried soil moisture sensor, model SM4-ECO

?Is Your Plant’s Roots Getting Enough Water

Modbus Soil Moisture Sensor – Model SM4-ECO

In greenhouses, orchards, and farmlands, one of the most critical parameters is measuring soil moisture levels. Monitoring soil moisture plays a vital role in both plant growth and efficient water management. This sensor measures the relative soil moisture percentage using a dedicated probe. It communicates this data via RS-485 using the Modbus RTU protocol, making it suitable for integration with PLCs, DCSs, RTUs, and other industrial systems.

This buried-type sensor is designed to be installed directly into the soil, providing high resistance to moisture, dust, and external elements. Since soil moisture can vary at different depths, the sensor is buried at a depth selected based on plant type and soil composition, ensuring precise measurement where the roots need it most.

*Essential for smart irrigation systems and climate control in greenhouses.

Chat on WhatsApp

جهت دریافت تمامی ویدئوهای فعلی و جدیدترین ویدئوهای ضبط شده با موضوعات اتصال و راه اندازی محصول و ارتباط با انواع PLC و HMI کلیک کنید.

ویدئوهای جدید رو به ایمیل من بفرست

Connecting PLCs to Instrumentation Equipment

Can the sensor be connected to a computer or laptop? If yes, how?

Yes. These sensors can be connected to various computers (regardless of the operating system) using RS-485 to USB converters.

If you have technical questions about the product and its components, how can you ask them?

Your technical questions about the product can be sent as text messages (SMS or social media) to the support team, and the technical experts will respond through the same channels. If needed, they will contact you directly.

Sales and Support Team Number:
+989177391091

Can the product be used in outdoor environments?

Yes. Since the device enclosure has an IP66 protection rating against water and dust ingress, this product can be used in outdoor environments. However, it is not recommended to expose it continuously to rain or direct water spray.

Does direct water spray on the sensor cover cause damage to the sensor?

Due to the protective cover on the sensor, sudden sprays of non-acidic liquids are repelled and do not cause any damage to the sensor.

How can the measurements taken by this sensor be viewed?

Since this sensor communicates via the Modbus protocol with devices such as PLCs, RTUs, and HMIs, you can view the measurements on industrial HMI displays and your personal computer monitor.

Is a cable included with the sensor?

Yes. One meter of flexible four-core cable (power + RS-485) with a thickness of 0.25 mm² is included with the product.

Through which network does the sensor communicate with other equipment?

Via the Modbus-RTU network

Can I change the sensor's address?

Yes, the sensor’s slave address can be changed via software using Modbus commands.

Which countries are the components used in this circuit manufactured in?

The components used in this sensor are manufactured in the USA and Switzerland.

Is it possible to use multiple sensors on a single Modbus network (line)?

Yes, according to Modbus protocol standards, this is possible. For more information and details on how to differentiate sensor data, you can refer to the sensor setup tutorial file.

Where can I find the product installation and setup guides?

You can find all tutorials and necessary files on the product page under the “Product Videos” and “Downloadable Files” tabs. Click here.

Does the sensor connect directly to the PLC?

Some PLCs have an RS-485 port, allowing the sensor to connect directly. However, for PLCs without an RS-485 port, the sensors must be connected via RS-485 expansion cards.

Can this sensor be used in a furnace?

Due to the sensor’s casing material, it cannot be installed directly inside a furnace. However, the company can provide the sensor with a half-meter cable, allowing customers to place the sensor circuitry outside while installing the sensor itself inside the furnace.

Keep me updated with your latest news and articles.

Office Hours

Feel free to message me on Telegram or WhatsApp — I’ll get back to you as soon as I can.
For urgent matters, send an SMS or give me a call.

?Is Your Plant’s Roots Getting Enough Water

Modbus Soil Moisture Sensor – Model SM4-ECO

Modbus Protocol

Measurement Range

Dust and Water-Resistant Package

Burial capability

Compatible with all types of PLCs