Delta-T
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| Brand | Delta-T |
|---|---|
| Origin | United Kingdom |
| Model | EQ3 Equitensiometer |
| Measurement Range | 0 to −1000 kPa (0 to −10 bar) |
| Accuracy | ±10 kPa (0 to −100 kPa) or ±10% of reading (−100 to −1000 kPa) |
| Temperature Accuracy | ±0.5 °C (0–40 °C), ±0.75 °C (−20 to +60 °C) |
| Output | 0–1.0 V (non-linear), thermistor resistance 5.8 Ω to 28 kΩ |
| Power Supply | 5–14 V DC, 18 mA/s |
| IP Rating | IP68 |
| Probe Dimensions | 181 mm × 40.5 mm dia |
| Weight | 0.3 kg |
| Calibration | Individual sensor calibration provided |
| Brand | Delta-T |
|---|---|
| Origin | United Kingdom |
| Model | SM150T |
| Measurement Principle | Frequency Domain Reflectometry (FDR) |
| Soil Moisture Range | 0–0.7 m³·m⁻³ (standard), extendable to 0–1.0 m³·m⁻³ |
| Soil Moisture Accuracy | ±0.03 m³·m⁻³ (±3% vol.) |
| Soil Temperature Range | −20 to +60 °C |
| Temp. Accuracy | ±0.5 °C (0–40 °C), ±0.75 °C (−20 to +60 °C) |
| Electrical Conductivity Tolerance | 50–500 mS·m⁻¹ |
| EC-Induced Error | < ±0.035 m³·m⁻³ (for θ = 0.05–0.4 m³·m⁻³) |
| Output Signal | 0–1.0 V analog |
| Power Supply | 5–14 VDC, 18 mA @ 1 s sampling interval |
| IP Rating | IP68 |
| Operating Temperature | −40 to +70 °C |
| Sensing Volume | Ø70 mm × 55 mm cylinder |
| Probe Dimensions | 51 mm × Ø2.5 mm |
| Mass | 0.1 kg |
| Compatible Loggers | Delta-T GP1, GP2, DL2e, DL6 |