Description
The analog soil moisture sensor measures 0-100% RH with 0.1% resolution and ±2-3% accuracy. It features temperature compensation (0-50°C), IP68 waterproofing, and is built with anti-corrosion alloy and epoxy resin sealing. Designed for full burial or insertion in soil, it’s ideal for soil or nutrient solution monitoring.
Specification
| Model | ATO-VMS-3000-TR |
| Power Voltage | 12-30VDC |
| Soil Moisture Range | 0-100% RH, Resolution: 0.1% RH, Accuracy: 0-50% ±2% RH @ standard (30% RH, 25°C); 50-100% ±3% RH @ standard (60% RH, 25°C) |
| Electrical Conductivity Temperature Compensation | Built-in temperature compensation sensor, compensation range: 0-50°C |
| Protection Level | IP68 waterproof for long-term immersion |
| Probe Material | Anti-corrosion special alloy |
| Sealing Material | Black epoxy resin |
| Installation Method | Fully buried or probe inserted in measured medium |
| Default Cable Length | 2 meters |
| Dimensions | 45*15*123 mm |
| Electrode Length | 70 mm |
| Measurement Principle | Soil moisture TDR method |
| Measurement Method | Soil probe insertion or immersion in nutrient solution/water |
| Operating Temperature | -40°C~60°C |
| Kernel chip temperature | 85°C |
Features
- High Precision Measurement: Provides accurate and reliable soil moisture readings.
- Fast Response: Quickly detects changes in soil moisture levels for timely data.
- Corrosion Resistance: Made with anti-corrosive materials, ideal for long-term soil monitoring.
- Long-Lasting Electrolyte Durability: Designed to withstand prolonged use in soil without degradation.
- Stable Output: Ensures consistent data output for reliable monitoring.
- Low Power Imported Chip: Features a high-quality, low-power chip for efficient performance.
- IP68 Waterproof and Dustproof: Suitable for harsh outdoor environments, ensuring durability.
- Epoxy Resin Vacuum Seal: Sealed with epoxy resin for enhanced protection against moisture and debris.
Wiring
No EC:
| Wire Color | Description | Notes |
| Brown | Power Positive | 10–30V DC |
| Black | Power Negative / Temperature Signal Negative / Moisture Signal Negative | GND |
| Blue | Temperature Signal Positive | Temperature Signal Output |
| Yellow | Moisture Signal Positive | Moisture Signal Output |
With EC
| Wire Color | Description | Notes |
| Brown | Power Positive | Power type, refer to power supply specifications |
| Black | Power Negative / Conductivity Signal Negative / Moisture Signal Negative | GND |
| Blue | Conductivity Signal Positive | Conductivity Signal Output |
| Yellow | Moisture Signal Positive | Moisture Signal Output |
Size
Application
Tips: How does the analog soil moisture sensor use the TDR method for measuring soil moisture?
The analog soil moisture humidity utilizes Time-Domain Reflectometry (TDR) technology to measure soil moisture content. TDR works by sending an electrical pulse along a probe inserted into the soil. As the pulse travels, it interacts with the soil moisture, causing changes in the signal’s reflection time. The sensor calculates moisture content based on these reflections, as the presence of water in soil affects the dielectric properties and thus the speed of the pulse. This method provides high accuracy, is less affected by soil salinity, and is reliable for various soil types, making TDR an industry-preferred choice for precise soil moisture monitoring.
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