Soil Moisture Determinator
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| Brand | ATAGO |
|---|---|
| Origin | Japan |
| Model | PAL-Soil |
| Measurement Range (w/w) | 0–200% |
| Measurement Range (v/v) | 0–100% |
| Accuracy (w/w) | ±2% (0–40%), ±5% (41–100%) |
| Accuracy (v/v) | ±1% (0–60%), ±2% (61–100%) |
| Temperature Range | 10–40°C (ATC) |
| Resolution | 0.1% |
| Power | 2 × AAA batteries |
| IP Rating | IP65 |
| Dimensions | 5.5 × 3.1 × 10.9 cm |
| Weight | 100 g (instrument only) |
| Brand | Delta-T Devices |
|---|---|
| Origin | United Kingdom |
| Model | PR2-4 |
| Measurement Principle | Frequency Domain Reflectometry (FDR) |
| Probe Depths | 10, 20, 30, and 40 cm |
| Output | Four analog voltage signals (0–1 V corresponding to 0–60 % vol) |
| Volumetric Water Content Range | 0–100 % vol (optimal accuracy: 0–40 % vol) |
| Accuracy | ±4 % vol (0–+40 °C, soil-specific calibration) or ±6 % vol (0–+40 °C, generic calibration) |
| Salinity Tolerance | 50–400 mS/m (pore water electrical conductivity) |
| Sensor Sensitivity Volume | Cylindrical zone of 10 cm diameter × 5 cm height (95 % contribution to reading) |
| Operating Temperature | –20 to +70 °C (optimal accuracy: 0–+40 °C) |
| IP Rating | IP67 (probe), IP52 (HH2 meter) |
| Power Supply | 5.5–15 V DC |
| Current Draw | <80 mA |
| Response Time | 1 s |
| Cable | Shielded 9-conductor, standard 1.5 m with M12 IP68 connector |
| Probe Material | Polycarbonate housing with stainless steel tip |
| Probe Dimensions | 750 mm length × 25.4 mm diameter |
| Probe Weight | 0.6 kg |
| HH2 Meter Display | 16×2 character LCD |
| HH2 Memory Capacity | 166–782 readings |
| HH2 Battery Life | ~4500 measurements on one 9 V alkaline cell |
| EMC Compliance | Meets EU EMC Directive 2014/30/EU |
| Brand | YunJingTianHe |
|---|---|
| Origin | Shandong, China |
| Manufacturer Type | Direct Manufacturer |
| Country of Origin | China |
| Model | TH-WS485 |
| Power Supply | DC 12 V |
| Power Consumption | < 0.1 W |
| Operating Temperature Range | −30 to +70 °C |
| Communication Interface | RS-485 |
| Operating Current | 8 mA @ 12 V DC |
| Minimum Data Interval | 60 s |
| Soil Temperature Measurement Range | −30 to +70 °C |
| Soil Temperature Accuracy | ±0.3 °C (−10 to +50 °C) |
| Soil Temperature Resolution | 0.01 °C |
| Soil Volumetric Water Content (VWC) Range | 0–100 % |
| VWC Accuracy | ±3 % (for loam soils) |
| VWC Resolution | 0.01 % |
| Calibration Requirement | Site-specific calibration recommended for high-organic-matter soils (>12 % SOC) or high-clay soils (>45 % clay content) |
| Brand | Yuntang |
|---|---|
| Origin | Shandong, China |
| Manufacturer Type | Direct Manufacturer |
| Country of Origin | China |
| Model | YT-S |
| Soil Volumetric Water Content Range | 0–100% |
| Accuracy | ±2% (0–50%), ±3% (50–100%) |
| Resolution | 0.1% |
| Interchangeability Error | <3% |
| Repeatability Error | <1% |
| Response Time | <1 s |
| Stabilization Time | 1 s |
| Sensing Volume | Cylinder, Ø10 cm × H10 cm |
| Dimensions | 204 × 100 × 36 mm |
| Weight | 0.3 kg |
| Data Storage Capacity | 300,000 records |
| Display | Color LCD |
| Connectivity | USB + 4G wireless upload to cloud platform |
| Software | Free PC software with Excel export, curve plotting, and threshold-based color-coded alerting |
| Brand | Yuntang |
|---|---|
| Origin | Shandong, China |
| Manufacturer Type | OEM/ODM Producer |
| Country of Origin | China |
| Model | YT-TY / YT-TY+ |
| Price Range | USD 280 – 420 (FOB) |
| Measurement Parameters | Volumetric Water Content (0–100% m³/m³, ±2% accuracy in 0–50%, ±3% in 50–100%), Soil Temperature (−40 to +120 °C, ±0.2 °C), Electrical Conductivity (0–20 mS/cm, ±2%), pH (0–14, ±0.2), Resolution: 0.1% (moisture), 0.1 °C (temp), 0.1 mS/cm (EC), 0.1 (pH) |
| Sensor Integration | Tri-functional probe (moisture/temperature/EC), separate pH composite electrode with ATC |
| Data Logging | Internal storage up to 300,000 records, user-configurable sampling interval, auto power-loss protection |
| Connectivity | USB data export, optional 4G LTE module for cloud upload to web-based agricultural analytics platform |
| Power | Rechargeable Li-ion battery + AC adapter |
| Dimensions | 100 × 210 × 35 mm |
| Compliance | Designed per ISO 11277 (soil physical analysis), ASTM D4959 (soil EC), and GLP-aligned data integrity practices (audit trail, timestamped records, user-defined metadata) |
| Brand | Yuntang |
|---|---|
| Origin | Shandong, China |
| Manufacturer Type | Direct Manufacturer |
| Origin Category | Domestic (China) |
| Model | YT-TY / YT-WSYP |
| Price Range | USD 280 – 380 |
| Measurement Parameters | Volumetric Water Content (0–100 % m³/m³, ±2 % accuracy in 0–50 % range), Soil Temperature (−40 to +120 °C, ±0.2 °C), Electrical Conductivity (0–20 mS/cm, ±2 %), pH (0–14, ±0.2), Resolution: 0.1 % (moisture), 0.1 °C (temp), 0.1 mS/cm (EC), 0.1 (pH) |
| Sensor Integration | Tri-functional probe (moisture/temperature/EC), separate temperature-compensated pH composite electrode |
| Data Logging | Up to 300,000 records, user-configurable sampling interval, auto-recognition of connected sensors |
| Connectivity | USB data export, optional 4G module for cloud upload to agricultural IoT platform |
| Power | Rechargeable Li-ion battery + AC adapter |
| Dimensions | 10 × 21 × 3.5 cm |
| Compliance | Designed for field-deployable environmental monitoring per ISO 11277 (soil physical analysis), ASTM D5891 (soil moisture by TDR/FDR principles), and GLP-aligned data integrity practices |