INFWIN MS20-Soil Moisture and Temperature Sensor

$ 89.00 USD

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INFWIN P/N MS20-AACA002

Quantity

SKU:123004224

Out of stock — Available on backorder

The INFWIN MS20 is a soil moisture and temperature sensor with RS485/Modbus-RTU output. Its resin-sealed plastic body with stainless steel rods inserts directly into soil for long-term in-situ measurement. Output interface, moisture range, power supply, and cable length are all configurable via ordering code - the default variant (MS20-AACA002) ships with RS485/Modbus-RTU output, 0–100% moisture range, 3.6–30V DC supply, and a 2 m cable.

MS20 uses FDR (Frequency Domain Reflectometry) for soil moisture measurement and offers low salinity sensitivity, minimal soil disturbance, and IP68 waterproofing for direct burial. Reverse power protection and built-in TVS/ESD protection are included.

Key Features

Dual measurement: Soil volumetric water content (VWC) and temperature in a single probe
FDR moisture sensing: Frequency Domain Reflectometry — low sensitivity to soil salinity, stable long-term readings
Flexible output interface: RS485/Modbus-RTU, RS485 + analog voltage, RS485 + analog current, analog voltage 0–2V, analog current 4–20mA, or SDI-12 (see ordering code)
Configurable moisture range: 0–100% or 0–50% VWC; higher resolution and accuracy in the 0–50% range
Higher accuracy than MS10: ±2% (0–50% range) and ±3% (50–100% range)
Soil-type calibration: Configurable soil type via Modbus register for improved accuracy. Can also be factory-calibrated for specific soils.
IP68 waterproof: Fully sealed with epoxy resin body and stainless steel rods; suitable for direct soil burial
Wide operating range: −40°C to +85°C operating temperature; suitable for outdoor and agricultural deployments
Reverse power protection: Built-in TVS/ESD protection
RS485 Modbus-RTU protocol: Standard Modbus register map; configurable slave address, baud rate, parity, and stop bits. Factory defaults: address 1, 9600 bps, 8N1.
Active output mode: Sensor can push data at a configurable interval without master polling (RS485 variants)
Configuration utility: SensorOneSet software included for sensor configuration via RS485
Cable length: 2 m standard; custom lengths available

Applications

Agricultural irrigation control and smart farming
Greenhouse and nursery soil monitoring
Scientific research and soil science experiments
Environmental monitoring and field data logging
Sports turf and golf course irrigation management
LoRaWAN IoT deployments via the Catena-5310 or compatible RS485/Modbus-RTU gateway

Important Notes

The sensor rods are sharp for ease of insertion - handle with care and follow installation precautions.
Do not pull the sensor out of soil by its cable. If resistance is felt during insertion, stop and re-insert at a new location to avoid hitting stones.
For buried installation at depth, drill a 45 mm diameter hole at about 10° to the vertical using an auger, then insert and backfill.
4–20mA output variants require 12–30V DC supply; the 3.6–30V DC supply option (Code A) is not compatible with 4–20mA output.
When using Active Output mode on RS485, only one sensor should be on the RS485 network to avoid data collision.

Specifications

Soil Moisture (VWC)
Measurement technique	FDR (Frequency Domain Reflectometry)
Range	0–100% or 0–50% VWC (selectable via ordering code)
Resolution	0.03% (0–50% range); 1% (50–100% range)
Accuracy	±2% (0–50% range); ±3% (50–100% range)
Temperature
Range	−40°C to +80°C
Resolution	0.1°C
Accuracy	±0.5°C
Output Interface (selectable)
RS485 Modbus-RTU	Default for MS20-AACA002; 9600 bps, 8N1 factory default
Analog voltage	0–2V (output resistance ~0 Ω)
Analog current	4–20mA (load resistor <500 Ω)
SDI-12	Available as ordering option
Power Supply (per output type)
RS485 / Analog voltage	3.6–30V DC (6mA @ 24V DC)
Analog current 4–20mA	12–30V DC (50mA @ 24V DC, with 2×20mA output signal)
Low-power option	2.0–5.5V DC or 2.7–16V DC (not applicable for 4–20mA output)
Mechanical
Dimensions	88 × 71 × 26 mm
Sensor rod material	Stainless steel
Sealing	Epoxy resin
IP rating	IP68
Cable length	2 m standard; custom length available
Installation	Surface or buried
Environmental
Operating temperature	−40°C to +85°C

Ordering Code Guide

Code 1: Product Series	MS20	MS20 Soil Moisture & Temperature Sensor
Code 2: Measuring Parameters	A B	Soil Moisture & Temperature Soil Moisture only
Code 3: Moisture Range	A B	0–100% VWC 0–50% VWC
Code 4: Output Interface	A B C D E F G	Analog Voltage 0–2V Analog Current 4–20mA RS485, Modbus-RTU RS485, Modbus-RTU + Analog Voltage 0–2V RS485, Modbus-RTU + Analog Current 4–20mA SDI-12 Customize
Code 5: Power Supply	A B C D E	3.6–30V DC (not for 4–20mA output) 12–30V DC 2.7–16V DC (not for 4–20mA output) Customize 2.0–5.5V DC (not for 4–20mA output)
Code 6: Cable Length	002 XXX	2 meters Custom (XXX = length in meters, e.g. 005 = 5 m)

Default Variant: MS20-AACA002

Measuring parameters	Soil moisture (VWC) and temperature
Moisture range	0–100% VWC
Output interface	RS485, Modbus-RTU
Power supply	3.6–30V DC
Cable length	2 meters

Custom variants (output interface, moisture range, power supply, cable length, soil calibration) are available - contact us to discuss your requirements.