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| Brand | Apogee |
|---|---|
| Origin | USA |
| Model | SU-200-SS / SU-202-SS / SU-205-SS |
| Spectral Range | 300–400 nm |
| Output Types | 0–10 mV (SU-200-SS), 0–2.5 V (SU-202-SS), 0–5 V (SU-205-SS) |
| Calibration Unit | W·m⁻² (irradiance) |
| Measurement Range | 0–100 W·m⁻² |
| Spectral Bandwidth | 300–400 nm |
| Wavelength Accuracy | ±5% |
| Stray Light Rejection | ±1% |
| Operating Temperature | −35 to +85 °C |
| Relative Humidity Range | 0–100% RH |
| Housing IP Rating | IP68 |
| Cable Length | 5 m |
| Sensor Diameter × Height | Φ30.5 × 37 mm |
| Weight | 140 g |
| Long-Term Drift | <2% per year |
| Nonlinearity | <1% |
| Directional Response | ±2% at 45°, ±5% at 75° |
| Temperature Coefficient | 0.1% / °C |
| Calibration Uncertainty | ±10% |
| Brand | Apogee |
|---|---|
| Origin | USA |
| Model | SP-110 / SP-212 / SP-214 / SP-215 / SP-230 |
| Output Types | mV (SP-110, SP-230), 0–2.5 V (SP-212), 4–20 mA (SP-214), 0–5 V (SP-215) |
| Spectral Range | 360–1120 nm |
| Field of View | 180° |
| Sensitivity | 0.2 mV/(W·m⁻²) (SP-110, SP-230), 2.0 mV/(W·m⁻²) (SP-212), 0.013 mA/(W·m⁻²) (SP-214), 4.0 mV/(W·m⁻²) (SP-215) |
| Calibration Uncertainty | ±5% |
| Nonlinearity | <1% (0–1250 or 0–1750 W·m⁻², model-dependent) |
| Response Time | <1 ms |
| Directional Error @75° | ±5% |
| Temperature Response | −0.04 ± 0.04 %/°C |
| Operating Environment | −40 to +70 °C, 0–100 % RH |
| Long-Term Drift | <2 %/year |
| Repeatability | <1% |
| Housing Dimensions | Ø24 mm × 28 mm |
| Weight (with 5 m cable) | 90 g (SP-110, SP-212, SP-215, SP-230), 140 g (SP-214) |
| Warranty | 4 years |
| Brand | Apogee |
|---|---|
| Origin | USA |
| Model | PS-200 |
| Spectral Range | 190–850 nm |
| Calibration Wavelength Range | 300–850 nm |
| Wavelength Resolution | 0.85 nm |
| Detector | 2048-pixel CCD |
| Grating Density | 590 lines/mm |
| A/D Conversion | 16-bit |
| Signal-to-Noise Ratio | 1000:1 |
| Stray Light | 0.02% at 435 nm |
| Repeatability | <1% |
| Radiometric Accuracy | ±10% |
| Integration Time | 1 ms – 65 s |
| Angular Response (up to 80°) | ±5% |
| Interface | USB 2.0 |
| Power Supply | 5 V DC / 100 mA via USB |
| Operating Temperature | 0–60 °C |
| Optical Fiber Length | 2 m |
| Dimensions | 69 × 100 × 150 mm |
| Weight | 900 g |
| Brand | Apogee |
|---|---|
| Origin | USA |
| Model | MU-100 / MU-200 |
| Spectral Range | 250–400 nm |
| UVA Range | 315–400 nm |
| UVB Range | 280–315 nm |
| Output Units | μmol·m⁻²·s⁻¹ and W·m⁻² |
| Calibration Uncertainty | ±10% |
| Repeatability | <1% |
| Long-Term Drift | <3% per year |
| Nonlinearity | <1% (up to 300 μmol·m⁻²·s⁻¹) |
| Response Time | <1 ms |
| Field of View | 180° |
| Directional Response | ±10% at 75° zenith angle |
| Temperature Dependence | ~0.1%/°C |
| Operating Environment | 0–50°C, ≤90% RH non-condensing |
| Probe IP Rating | IP68 (MU-200 probe, 30 m submersible) |
| Data Logging | Manual (99 points) or Automatic (30 s sampling interval, 30 min averaging, 99 daily means) |
| Power | CR2320 coin cell (MU-100) |
| Dimensions (Meter) | 126 × 70 × 24 mm |
| Weight (Meter only) | 150 g (MU-100), 180 g (MU-200 body) |
| Cable Length (MU-200) | 2 m |
| Accessories | AC-100 USB interface cable, AM-310/AM-320 telescoping probe handles, AL-100/AL-210 leveling mounts with bubble vials and three-point adjustment |
| Brand | Apogee |
|---|---|
| Origin | USA |
| Manufacturer Type | Authorized Distributor |
| Product Origin | Imported |
| Model | Cloudburst SG-400 Series |
| Output Interface | SDI-12 v1.4 (Modbus option planned) |
| Capture Area | 324 cm² (SG-400/SG-410) or 200 cm² (SG-420/SG-430) |
| Inlet Diameter | 8 in (20.3 cm) or 6.3 in (16 cm) |
| Precipitation Capacity | 900 mm (SG-400/SG-410) or 1500 mm (SG-420/SG-430) |
| Bucket Volume | 30 L |
| Heating Option | Optional (SG-410 & SG-430) |
| Accuracy (Cumulative) | ±0.1 mm (<5 mm), ±1% (>5 mm) |
| Accuracy (Rate) | ±5% (>2 mm/hr) |
| Resolution | 0.01 mm |
| Temperature Sensitivity | ±0.01 mm/°C |
| Long-Term Drift | <0.5%/year |
| Nonlinearity | <0.1 mm (SG-400/SG-420), <0.2 mm (SG-410/SG-430) |
| Sensor Type | Stainless Steel Strain-Gauge Load Cell |
| Power Supply | 5.5–26 VDC |
| Current Draw | 20 mA (non-heated), +2.1 A @24 VDC (heated) |
| Power Consumption | 240 mW (base), up to 50 W (heater active) |
| Operating Temperature | –20 to +60 °C |
| Humidity Range | 0–100% RH |
| Enclosure Rating | IP67 |
| Dimensions | Ø38 cm × H80 cm |
| Weight | 12 kg |
| Mounting | Compatible with 15.24 cm wooden posts or 10.16 cm metal pipes |
| Cable Length | 5 m standard |
| Brand | Apogee |
|---|---|
| Origin | USA |
| Model | MS100 |
| Spectral Range | 380–780 nm |
| Spectral Resolution | 1 nm |
| FWHM | ~12 nm |
| Wavelength Repeatability | ±1 nm |
| PPFD Range | 0.1–3,500 µmol/m²/s |
| Illuminance Range | 5–190,000 lx |
| Illuminance Accuracy | ±5 % (Illuminant A, 2856 K, 20,000 lx) |
| Chromaticity Accuracy | ±0.0025 in CIE 1931 x,y |
| CCT Accuracy | ±2 % |
| CRI Accuracy | ±1.5 % |
| Diffuse Rejection | −25 dB |
| Integration Time | 6–1,000 ms |
| Operating Temperature | 0–35 °C (RH ≤70 %, non-condensing) |
| Storage Temperature | −10–40 °C (RH ≤70 %, non-condensing) |
| Display | 0.96″ 128×64 monochrome OLED |
| Battery | 700 mAh / 3.7 V rechargeable Li-ion |
| Weight (with battery) | 70 g ±5 g |
| Dimensions | 90 × 30 × 32.2 mm |
| Data Storage | microSDHC up to 32 GB (supports ≥120,000 Excel files) |
| Connectivity | Mini-USB 2.0, Bluetooth 3.0/4.0 (iOS & Android compatible) |
| Software | Apogee InSight (Windows, macOS, iOS, Android) |
| Brand | Apogee |
|---|---|
| Origin | USA |
| Model | DLI400, DLI500, DLI600 |
| Measurement Wavelength Range | 400–700 nm (DLI400), 389–692 nm (DLI500), 383–757 nm (DLI600) |
| Measurement Range | 0–4000 µmol/m²/s |
| Resolution | 1 µmol/m²/s (real-time), 0.1 µmol/m²/s (stored PPFD), 0.1 mol/m²/day (DLI), 0.1 h (photoperiod) |
| Calibration Uncertainty | ±5% |
| Long-term Drift | <2%/year |
| Cosine Response Error | ±5% up to 75° zenith angle |
| Field of View | 180° |
| Response Time | 2.5 s |
| Data Logging Capacity | 99 days (DLI & photoperiod), 10 days (30-min averaged PPFD/ePPFD) |
| Operating Temperature | –40 to +70 °C (DLI500/DLI600), –10 to +60 °C (DLI400) |
| IP Rating | IP65 |
| Weight | 67 g |
| Power | Two AAA batteries (≈6 months life) |
| Brand | Apogee |
|---|---|
| Origin | USA |
| Model | SM500 / SM600 |
| Temperature Range | –60 to +80 °C |
| Temp Accuracy | ±0.2 °C |
| Temp Drift | <0.02 °C/year |
| Temp Repeatability | <0.01 °C |
| Temp Response Time | 7 s |
| RH Range | 0–95 %RH |
| RH Accuracy | ±3 % @ 20–80 %RH |
| CO₂ Range | 0–2000 ppm |
| CO₂ Accuracy | ±50 ppm + 2 % of reading |
| CO₂ Response Time | 105 s |
| Barometric Pressure Range | 70–110 kPa |
| Spectral Range (SM500) | 389–692 nm |
| Spectral Range (SM600) | 383–757 nm |
| PAR/ePAR Range | 0–4000 µmol·m⁻²·s⁻¹ |
| Calibration Uncertainty | ±5 % |
| Long-term Instability | <2 %/year |
| Measurement Repeatability | <0.5 % |
| Field of View | 180° |
| Directional Response Error | ±5 % @ 75° zenith angle |
| Azimuthal Error | <0.5 % |
| Tilt Error | <0.5 % |
| Nonlinearity | <1 % |
| Sensor Response Time | 1 ms |
| Temp Coefficient | –0.11 % ±0.04 %/°C |
| Daily Integral Uncertainty | <5 % |
| Power Supply | 5–30 V DC |
| Power Consumption | 1.1–1.5 W |
| Data Storage | 9 months of 1-minute intervals |
| Output Interfaces | Modbus RTU (RS-232 & RS-485) and Bluetooth 5.0 |
| Operating Environment | –40 to +60 °C, 0–100 %RH |
| Enclosure Material | White ASA plastic |
| IP Rating | IP53 |
| Weight | 392 g |
| Dimensions | Ø105 mm × H157 mm |
| Cable Length | 5 m |
| Brand | Apogee |
|---|---|
| Origin | USA |
| Model | SQ-500 |
| Power Supply | Self-powered (no external power required) |
| Sensitivity | 0.01 mV per μmol·m⁻²·s⁻¹ |
| Calibration Factor | 100 μmol·m⁻²·s⁻¹ per mV |
| Absolute Accuracy | ±5% |
| Repeatability | <1% |
| Long-term Drift | <2% per year |
| Nonlinearity | <1% up to 4000 μmol·m⁻²·s⁻¹ |
| Response Time | <1 ms |
| Field of View | 180° (cosine-corrected hemispherical) |
| Spectral Range | 389–692 nm |
| Directional Response Error at 75° | ±5% |
| Temperature Response | −0.11 ± 0.03 %/°C |
| Operating Environment | −40 to +70 °C, 0–100% RH |
| Dimensions | Ø24 mm × 35 mm (sensor head) |
| Weight | 100 g (sensor with 5 m cable) |
| Waterproof Rating | Submersible to 30 m |
| Warranty | 4 years |
| Brand | Apogee |
|---|---|
| Origin | USA |
| Model | SI-111 |
| Operating Wavelength | 8–14 µm |
| Field of View | 22° half-angle |
| Accuracy | ±0.2 °C @ −10 to +65 °C |
| Repeatability | ±0.05 °C @ 10 to +65 °C |
| Response Time | <1 s |
| Output | 60 µV/°C (target), 0–2500 mV (sensor body temperature) |
| Housing | Anodized aluminum with germanium optical window |
| Dimensions | Ø23 mm × 60 mm |
| Weight | 190 g |
| Cable | 4.5 m, 4-conductor shielded |
| Operating Ambient | −55 to +80 °C, 0–100 % RH |
| Power Supply | 2.5 V excitation for thermistor |
| Brand | Apogee |
|---|---|
| Origin | USA |
| Model | MQ-100 / MQ-200 / MQ-306 |
| Spectral Range | 410–655 nm |
| PAR Measurement Range | 0–3000 µmol/m²/s |
| Field of View | 180° |
| Calibration Uncertainty | ±5% |
| Repeatability | <1% |
| Long-Term Drift | <2% per year |
| Nonlinearity | <1% (up to 3000 µmol/m²/s) |
| Response Time | <1 ms |
| Directional (Cosine) Error | ±5% at 75° zenith angle |
| Temperature Dependence | 0.06 ± 0.06 %/°C |
| Operating Environment | 0–50 °C, ≤90% RH non-condensing |
| Waterproof Rating | IP68 (MQ-200, MQ-301, MQ-303, MQ-306 probe) |
| Data Logging | Manual (99 samples) or Automatic (30-sec measurement interval, 30-min averaging, 99 daily means) |
| Display | Integrated LCD |
| Interface | AC-100 USB cable |
| Power | CR2320 coin cell (MQ-100/MQ-200), CR2477 (MQ-301/MQ-303/MQ-306) |
| Dimensions (Meter) | 125 × 70 × 24 mm |
| Weight (Meter) | 150 g (MQ-100), 180 g (MQ-200), 380 g (MQ-301), 300 g (MQ-303/MQ-306) |
| Probe Count | 1 (MQ-100/MQ-200), 10 (MQ-301), 3 (MQ-303), 6 (MQ-306) |
| Probe Cable Length | None (MQ-100), 2 m or 5 m (MQ-200), 70 cm rod (MQ-301), 50 cm rod (MQ-303/MQ-306) |
| Brand | Apogee |
|---|---|
| Origin | USA |
| Model | SN-522-SS / SN-522 |
| Spectral Range (Shortwave, Upward) | 385–2105 nm |
| Spectral Range (Shortwave, Downward) | 295–2685 nm |
| Spectral Range (Longwave) | 5–30 µm |
| Shortwave Measurement Range | 0–2000 W/m² |
| Longwave Net Measurement Range | −200 to +200 W/m² |
| Sensitivity (Shortwave, Up) | 0.045 mV/(W/m²) |
| Sensitivity (Shortwave, Down) | 0.035 mV/(W/m²) |
| Sensitivity (Longwave) | 0.12 mV/(W/m²) |
| Calibration Uncertainty (Shortwave) | <3% @ 1000 W/m² |
| Calibration Uncertainty (Longwave) | ±5% |
| Output Signal (Shortwave) | 0–90 mV (up), 0–70 mV (down) |
| Output Signal (Longwave) | −24 to +24 mV |
| Response Time | <0.5 s (analog), 750 ms (digital processing) |
| Field of View | 180° (upward shortwave), 150° (downward shortwave & longwave) |
| Cosine Response Error | <30 W/m² at 80° solar zenith (up), <20% from 0–60° (down) |
| Zero Offset A | <5 W/m² (unheated), <10 W/m² (heated) |
| Zero Offset B | <5 W/m² |
| Nonlinearity | <1% |
| Repeatability | <1% |
| Long-Term Drift | <2%/year |
| Temperature Operating Range | −50 to +80 °C |
| Relative Humidity Range | 0–100% RH |
| Power Supply | 5.5–24 V DC |
| Current Draw (Heater On, 12 V DC) | 72 mA |
| Current Draw (Heater Off, 12 V DC) | 13.5 mA |
| Heater Power (per sensor) | 740 mW @ 12 V DC |
| Dimensions | 116 × 45 × 66 mm |
| Weight | 320 g (incl. mounting rod and 5 m cable) |
| Cable | 5 m shielded twisted-pair, Santoprene jacket, M8 IP68 connector |
| Integrated Temperature Sensor | 30 kΩ thermistor, ±1 °C tolerance at 25 °C |
| Thermistor Output | 0–2500 mV (typical), excitation voltage 2500 mV (typical) |
| Brand | Apogee |
|---|---|
| Origin | USA |
| Model | SQ-420 |
| Spectral Range | 410–655 nm |
| Calibration Uncertainty | ±5% |
| Repeatability | <1% |
| Long-Term Drift | <2% per year |
| Nonlinearity | <1% (up to 3000 µmol·m⁻²·s⁻¹) |
| Response Time | 1 s |
| Directional Error | ±5% (at 75° zenith angle) |
| Temperature Dependence | 0.06 ± 0.06 %/°C |
| Operating Environment | −40 to +70 °C, 0–100% RH |
| Submersible Depth | <30 m |
| Field of View | 180° |
| Resolution | 0.1 µmol·m⁻²·s⁻¹ |
| Internal Memory Capacity | 10,000 measurements |
| Sampling Interval | 1 s to 1440 min (user-configurable) |
| Power Supply | USB 5 VDC |
| Current Draw | 5.1 mA |
| Probe Dimensions | 60 mm (diameter) × 70 mm (height) |
| Cable Length | 4.6 m |
| Weight | 90 g |
| Brand | Apogee |
|---|---|
| Origin | USA |
| Model | SN-500 |
| Measurement Range | Shortwave Up: 0–2000 W/m² |
| Shortwave Down | 0–2000 W/m² |
| Longwave Up | –200 to +200 W/m² |
| Longwave Down | –200 to +200 W/m² |
| Spectral Range | Shortwave Up: 385–2105 nm |
| Shortwave Down | 295–2685 nm |
| Longwave Up/Down | 5000–30,000 nm |
| Sensitivity | 55 µV/W/m² (SW Up) |
| Response Time | <1 s (to 95%) |
| Zero Offset (5 K/h) | 18.2 W/m² (SW Up) |
| Field of View | SW Up: 180° |
| SW Down | 150° |
| LW Up/Down | 180° |
| Built-in Temperature Sensor | PT-100 Platinum RTD |
| Heater | 12 V DC |
| Cable Length | 5 m |
| Ingress Protection | IP67 |
| Output Interface | SDI-12 (4 independent channels) |
| Operating Environment | –50 °C to +80 °C, 0–100 % RH |
| Brand | Apogee |
|---|---|
| Origin | USA |
| Model | SO-110, SO-120, SO-210, SO-220 |
| Measurement Range | 0–100 % O₂ |
| Output Sensitivity | 2.6 mV/%O₂ (SO-110/SO-210), 0.6 mV/%O₂ (SO-120/SO-220) |
| Output at 20.95 %O₂ | 6 mV (SO-110), 3 mV (SO-120), 55 mV (SO-210), 12.5 mV (SO-220) |
| Repeatability | ±0.001 %O₂ |
| Nonlinearity | <0.01 %O₂ |
| Long-term Drift | 1 mV/year (SO-110/SO-210), 0.8 mV/year (SO-120/SO-220) |
| Response Time (t₉₀) | 60 s (SO-110/SO-120), 14 s (SO-210/SO-220) |
| Operating Temperature | –20 to +60 °C |
| Relative Humidity Range | 0–100 % RH |
| Pressure Range | 60–140 kPa |
| Supply Voltage | 12 V DC (with heater), 2.5 V DC (for thermistor excitation) |
| Heater Current | 6.2 mA |
| Thermistor Excitation Current | 0.1 mA |
| Sensor Dimensions | 32 mm Ø × 68 mm L |
| Diffusion Probe (optional) | 35 mm Ø × 35 mm L, 125-mesh stainless steel screen |
| Flow-through Probe (optional) | 32 mm Ø × 91 mm L, 0.25″ nylon connector |
| Housing Material | Anodized aluminum or polypropylene |
| Internal Temperature Sensor | Yes, for thermal compensation |
| Heating Element | Integrated, prevents membrane condensation |
| Brand | Apogee |
|---|---|
| Origin | USA |
| Model | MC-100 |
| Measurement Unit | µmol chlorophyll m⁻² |
| Sampling Area | 63.6 mm² (9.0 mm diameter) / 19.6 mm² (5.0 mm reduced diameter) |
| Resolution | ±10 µmol m⁻² |
| Linearity | ±1% |
| Repeatability | ±1% |
| Sampling Time | 3 s |
| Memory Capacity | 94,000 measurements (8 MB internal) + 160,000 GPS-tagged records |
| Display | 125 × 37.5 px monochrome LCD |
| Interface | USB + RS-232 (GPS-integrated) |
| Operating Temperature | 0–50 °C with full-range thermal compensation |
| Power | 9 V DC alkaline battery |
| Dimensions | 152 × 82 × 25 mm |
| Warranty | 1-year limited warranty, lifetime technical support |
| Brand | Acclima, Inc. |
|---|---|
| Origin | USA |
| Model | SWHMS |
| Instrument Type | Multi-parameter Soil Monitoring System |
| Compliance | ASTM D5084, ISO 18643, USCRN Protocols, GLP-aligned Data Logging |
| Power Supply | 6–17 VDC |
| Communication | SDI-12, RS-232/RS-485 (via CR1000X) |
| Operating Temperature | −40 °C to +85 °C |
| Enclosure Rating | IP67/IP68 (sensor-specific) |
| Brand | Acclima, Inc. |
|---|---|
| Origin | USA |
| Model | TDR315N |
| Instrument Type | Soil Moisture / Water Potential Analyzer |
| Volumetric Water Content Range | 0–100% VWC |
| Resolution | 0.1% VWC |
| Accuracy | ±2% FS |
| Dielectric Constant Range | 1–100 |
| Resolution | 0.1 |
| Accuracy | ±2% |
| Bulk EC Range | 0–6000 µS/cm |
| Pore Water EC (Hilhorst Model) | 0–55,000 µS/cm |
| EC Resolution | 1 µS/cm |
| EC Accuracy | ±25 µS/cm (0–1000 µS/cm), ±2.5% (1000–2000 µS/cm), ±5% (2000–5000 µS/cm) |
| Temperature Range | −40 to +60 °C |
| Temp Accuracy | ±0.25 °C (5–35 °C), ±0.5 °C (−15 to +50 °C) |
| Temp Resolution | 0.1 °C |
| Rise Time (20–80%) | 300 ps |
| Waveform Digitization Resolution | 5 ps |
| Input Voltage | 6.5–15 V DC |
| Quiescent Current | 10 µA |
| Active Current | 118 mA @ 12 V DC |
| Output Interface | 3-wire SDI-12 v1.4 compliant |
| Probe Dimensions | 15 mm L × 3.5 mm Ø |
| Sensor Body | 210 mm × 53 mm × 20 mm |
| Weight (bare) | 105 g |
| Cable Length | 5 m standard (10 m optional) |
| Enclosure | Waterproof epoxy-filled housing |
| Brand | Acclima, Inc. |
|---|---|
| Origin | USA |
| Model | TDR305N |
| Instrument Type | Soil Moisture / Water Potential Analyzer |
| Volumetric Water Content Range | 0–100% VWC |
| Resolution | 0.1% VWC |
| Accuracy | ±2% FS |
| Repeatability (RMS) | 0.07% VWC |
| Dielectric Constant Range | 1–100 |
| Resolution | 0.1 |
| Accuracy | ±2% |
| Bulk EC Range | 0–3000 µS/cm |
| Stability | ±1% FS |
| Soil Temperature Range | −40 to +60 °C |
| Resolution | 0.1 °C |
| Accuracy | ±0.25 °C (5–35 °C), ±0.5 °C (−15–50 °C) |
| Pore Water EC (Hilhorst Model) | 0–55,000 µS/cm |
| Volume EC Resolution | 1 µS/cm |
| Repeatability | 3 µS/cm |
| Accuracy | ±25 µS/cm (0–1000 µS/cm), ±2.5% (1000–2000 µS/cm), ±5% (2000–5000 µS/cm) |
| Rise Time (20–80%) | 300 ps |
| Waveform Digitization Resolution | 5 ps |
| Incident Pulse Amplitude | 2.3 V |
| Power Supply | 6.5–15 V DC |
| Quiescent Current | 10 µA |
| Active Current | 118 mA @ 12 V DC |
| Output Interface | 3-wire SDI-12 v1.4 compliant |
| Probe Dimensions | 49.9 mm × Ø3.5 mm |
| Body Dimensions | 150 × 33 mm |
| Weight (no cable) | 121 g |
| Standard Cable Length | 5 m (optional: 10 m) |
| Housing | Waterproof epoxy-filled enclosure |
| Brand | Acclima, Inc. |
|---|---|
| Origin | USA |
| Model | TDR305W |
| Measurement Principle | Time-Domain Reflectometry (TDR) |
| Output Interface | 3-wire SDI-12 v1.4 compliant |
| Volumetric Water Content Range | 0–100% VWC |
| Resolution | 0.1% VWC |
| Accuracy | ±5% FS |
| Bulk EC Range | 0–9000 µS/cm |
| Pore Water EC (Hilhorst model) | 0–55,000 µS/cm |
| EC Accuracy | ±25 µS/cm (0–1000 µS/cm), ±2.5% (1000–2500 µS/cm), ±5% (2500–6000 µS/cm), ±7.5% (6000–9000 µS/cm) |
| Dielectric Constant Range | 1–100 |
| Resolution | 0.1 |
| Accuracy | ±4% |
| Temperature Range | −40 to +55 °C |
| Resolution | 0.1 °C |
| Accuracy | ±0.25 °C (5–35 °C), ±0.5 °C (−15–50 °C) |
| Waveform Digitization Resolution | 5 ps |
| Input Pulse Amplitude | 2.3 V |
| Housing | Waterproof epoxy-filled enclosure |
| Power Supply | 4.2–15 V DC |
| Quiescent Current | <26 µA |
| Active Current | 90 mA @ 12 V DC |
| Dimensions (sensor head) | 110 × 53 × 20 mm |
| Probe Length | 49.55 mm |
| Probe Diameter | 3.5 mm |
| Weight (bare sensor) | 94 g |
| Standard Cable Length | 5 m (optional: 10 m) |
| Brand | Acclima, Inc. |
|---|---|
| Origin | USA |
| Model | RD1200 |
| Instrument Type | Soil Moisture / Water Potential Analyzer |
| Measurement Principles | TDR (Time Domain Reflectometry) with Integrated Dielectric, Thermal, and Conductivity Sensing |
| Soil Volumetric Water Content Range | 0–100% VWC |
| Resolution | 0.1% VWC |
| Accuracy | ±1% VWC (coarse-medium soils), ±2.5% VWC (fine-textured soils) |
| Soil Temperature Range | −40 to +60 °C |
| Resolution | 0.1 °C |
| Accuracy | ±0.25 °C |
| Dielectric Constant Range | 1–80 |
| Resolution | 0.1 |
| Accuracy | ±1% (coarse-medium), ±2% (fine-textured) |
| Bulk Electrical Conductivity (ECb) | 0–5000 μS/cm |
| Pore Water Electrical Conductivity (ECw) | 0–55,000 μS/cm |
| EC Resolution | 1 μS/cm |
| EC Accuracy | ±25 μS/cm (0–1000 μS/cm), ±2.5% (1000–2000 μS/cm), ±5% (2000–5000 μS/cm) |
| GPS Module | Integrated SDI-12-compatible GNSS receiver (latitude, longitude, altitude, UTC time sync) |
| Data Storage | Internal non-volatile memory + USB 2.0 interface supporting up to 25 GB flash drives |
| Power Supply | 5 VDC @ 1 A (AC adapter: 100–240 VAC input) |
| Dimensions | 150 × 80 × 25 mm |
| Weight | 0.3 kg |
| Brand | Acclima, Inc. |
|---|---|
| Origin | USA |
| Model | TDR310W |
| Sensor Type | TDR-based Volumetric Water Content, Soil Temperature & Bulk Electrical Conductivity Sensor |
| Measurement Principle | Time-Domain Reflectometry (TDR) with Ultra-High-Speed Waveform Generation & 5 ps Timebase Resolution |
| Output Interface | 3-Wire SDI-12 v1.4 Compliant |
| Probe Length | 100 mm |
| Probe Diameter | 3.5 mm |
| Housing | Waterproof Epoxy-Filled Enclosure |
| Power Supply | 6.5–15 V DC |
| Quiescent Current | 10 µA |
| Active Current | 118 mA @ 12 V DC |
| Operating Temperature | –40 °C to +60 °C |
| Cable Length | 5 m (standard), optional 10 m |
| Weight | 94 g (sensor head only) |
| Dimensions (housing) | 160 × 53 × 20 mm |
| Volumetric Water Content Range | 0–100 % VWC |
| VWC Resolution | 0.1 % VWC |
| VWC Accuracy | ±2 % FS |
| VWC Repeatability (RMS) | 0.07 % VWC |
| Dielectric Constant Range | 1–100 |
| Dielectric Resolution | 0.1 |
| Dielectric Accuracy | ±2 % |
| Bulk EC Range | 0–6000 µS/cm |
| Bulk EC Resolution | 1 µS/cm |
| Bulk EC Accuracy | ±25 µS/cm (0–1000 µS/cm), ±2.5% (1000–2000 µS/cm), ±5% (2000–5000 µS/cm) |
| Pore Water EC (Hilhorst model) | 0–55,000 µS/cm |
| Soil Temperature Range | –40 °C to +60 °C |
| Temp Resolution | 0.1 °C |
| Temp Accuracy | ±0.25 °C (5–35 °C), ±0.5 °C (–15–50 °C) |
| Temp Repeatability (RMS) | 0.01 °C |
| Rise Time (20–80%) | 300 ps |
| Waveform Digitization Resolution | 5 ps |
| Incident Pulse Amplitude | 2.3 V |
| Brand | Acclima, Inc. |
|---|---|
| Origin | USA |
| Model | TDT |
| Instrument Type | Volumetric Water Content (VWC) and Bulk Electrical Conductivity (EC) Sensor |
| Measurement Principle | Time Domain Transmission (TDT) |
| VWC Range | 0–100.00% VWC |
| VWC Resolution | 0.06% VWC |
| VWC Accuracy | ±2% VWC (typical mineral soils) |
| Bulk EC Range | 0–5 dS/m |
| Bulk EC Resolution | 0.01 dS/m |
| Bulk EC Accuracy | ±0.2 dS/m |
| Bulk EC Stability | ±1% of full scale (0–5 dS/m) |
| Soil Temperature Range | –20 to +50 °C |
| Soil Temperature Resolution | 0.1 °C |
| Soil Temperature Accuracy | ±0.3 °C (0–40 °C), ±0.5 °C (–20–0 °C and 40–50 °C) |
| Response Time | 450 ms |
| Power Supply | 5–15 VDC (12 VDC nominal) |
| Current Draw | 84 mA (during measurement burst) |
| Output Protocol | SDI-12 v1.3 |
| Operating Temperature (in soil) | 0.5–50 °C (non-frozen conditions) |
| Storage Temperature | –20 to +75 °C |
| Dimensions | 20 × 5.33 × 1.5 cm |
| Weight | 220 g |
| Cable Length | 10 m |
| Brand | ALPHA (USA) |
|---|---|
| Origin | USA |
| Model | AIC3Pro |
| Instrument Type | Handheld |
| Flow Mode | Low-flow Gerdien Tube Design |
| Repeatability | ±5% |
| Accuracy | ±20%* |
| Ion Concentration Range | 0–2×10⁶ ions/cm³ or 0–2×10⁸ ions/cm³ (selectable) |
| Resolution | 10 ions/cm³ @ 2×10⁶ range |
| Polarity Modes | Unipolar (Positive/Negative) or Bipolar (with real-time Sum calculation) |
| Polarity Switching Interval (Bipolar) | 7.5 s per polarity |
| Data Logging | Timestamped CSV to removable microSD (up to 32 GB) |
| Display | 128×128 px backlit LCD |
| Battery | 2000 mAh rechargeable Li-ion (UN38.3 certified) |
| Operating Environment | –20 °C to +43 °C, 0–85% RH (non-condensing), wind <15 km/h |
| Humidity Sensor Accuracy | ±2% RH |
| Compliance | FCC Part 15, CE EMC (BS EN 55032:2015/Cor1:2016 |
| BS EN 61000-3-2 | 2019 |
| BS EN 61000-3-3 | 2013+A1:2017 |
| BS EN 55035 | 2017/A11:2020), RoHS (EN 50581:2012) |
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