INFWIN MT05RA Soil Moisture, EC and Temperature Sensor
MCCI P/N
123004227
INFWIN P/N
MT05R-AAAB002
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$ 129.00
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The INFWIN MT05RA is a compact soil/substrate moisture, EC (electrical conductivity), and temperature sensor with RS485/Modbus-RTU output. Its resin-sealed plastic body with sensing rods inserts directly into soil or soilless substrates (e.g. rockwool, coco coir) for long-term measurement in place. Power supply, connector type, and cable length are configurable via ordering code - the default variant (MT05R-AAAB002) ships with RS485/Modbus-RTU output, 3.0–28V DC supply, a cold-pressed terminal connector, and a 2 m cable.
MT05RA is significantly smaller than INFWIN's other soil sensors (20 × 11 × 95 mm) and is designed for low-power, battery-operated data logger deployments, with quiescent current under 300 µA. Reverse power protection and built-in TVS/ESD protection are included.
Key Features
- Triple measurement: Substrate volumetric water content (VWC), EC, and temperature in a single probe
- Compact form factor: 20 × 11 × 95 mm - smaller than INFWIN's MS10/MS20/MEC10/MEC20 probes
- Dual moisture output: Reports both volumetric water content (VWC) and apparent dielectric permittivity
- Substrate EC sensing: Direct conductivity measurement with temperature compensation (0–50°C)
- Low-power design: Quiescent current <300 µA; measuring current <10 mA during a 100 ms measurement - suited to battery-powered dataloggers
- Digital RS485 output: Modbus-RTU protocol over RS485 serial interface
- Low salinity sensitivity
- Robust epoxy encapsulation: Resists corrosive environments; IP68 rated
- Reverse power protection: Built-in TVS/ESD protection
- Connector options: Cold-pressed terminal or stripped & tinned lead wires
- Configuration utility: SensorOneSet software included for sensor configuration via RS485
- Cable length: 2 m standard; custom lengths available
Applications
- Smart agriculture, hydroponics, and horticulture
- Greenhouse monitoring
- Soil/substrate water balance studies
- Irrigation management
- Solute/fertilizer movement tracking
Important Notes
- Unlike INFWIN's MS10/MS20/MEC10/MEC20 series, MT05RA offers RS485/Modbus-RTU output only - no analog voltage, analog current, or SDI-12 variants.
- The sensor rods are sharp for ease of insertion - handle with care and follow installation precautions.
- Do not pull the sensor out of soil or substrate by its cable.
- When using Active Output mode on RS485, only one sensor should be on the network to avoid data collision.
Specifications
| Substrate Moisture (VWC) | |
| Range | 0–100% (air to water) |
| Resolution | 0.1% (0–50% range); 0.5% (50–100% range) |
| Accuracy | ±3% (0–50% range); ±5% (50–100% range) |
| Apparent Dielectric Permittivity | |
| Range | 1–81 (air to water) |
| Resolution | ±0.1 (1.00–40.00 range); ±0.5 (40.00–81.00 range) |
| Accuracy | ±1 (1.00–40.00 range); ±3 (40.00–81.00 range) |
| Substrate EC (Electrical Conductivity) | |
| Range | 0–20 dS/m |
| Resolution | 0.01 dS/m (0–5 dS/m range); 0.1 dS/m (5–20 dS/m range) |
| Accuracy | ±5% (0–5 dS/m range); ±10% (5–20 dS/m range) |
| Temperature compensation | 0–50°C |
| Substrate Temperature | |
| Range | −40°C to +80°C |
| Resolution | 0.1°C |
| Accuracy | ±0.5°C (0–50°C range); ±1.0°C (−40–80°C range) |
| Electrical | |
| Output interface | RS485, Modbus-RTU |
| Power supply | 3.0–28V DC |
| Quiescent current | <300 µA (typical) |
| Measuring current | <10 mA during 100 ms measurement (typical) |
| Mechanical | |
| Dimensions | 20 × 11 × 95 mm |
| Sealing | Epoxy resin |
| IP rating | IP68 |
| Connector | Cold-pressed terminal or stripped & tinned lead wires (selectable via ordering code) |
| Cable length | 2 m standard; custom length available |
| Environmental | |
| Operating temperature | −40°C to +80°C |
Ordering Code Guide
| Code 1: Product Series | MT05R | MT05R Sensor Series |
| Code 2: Measuring Parameters | A | Substrate Moisture & EC & Temperature (MT05RA) |
| Code 3: Power Supply | A | 3.0–28V DC |
| Code 4: Output Interface | A | RS485, Modbus-RTU |
| Code 5: Connector | B C |
Cold-pressed terminal Stripped & tinned lead wires |
| Code 6: Cable Length | 002 XXX |
2 meters Custom (XXX = length in meters, e.g. 005 = 5 m) |
Default Variant: MT05R-AAAB002 (MT05RA)
| Measuring parameters | Substrate moisture (VWC), EC, and temperature |
| Power supply | 3.0–28V DC |
| Output interface | RS485, Modbus-RTU |
| Connector | Cold-pressed terminal |
| Cable length | 2 meters |
Custom variants (connector, cable length) are available; contact us to discuss your requirements.