Specifications

General

  • Temperature and Humidity
    • Storage: -20 – 60 °C; up to 85% RH
    • Operating: -20 – 50 °C; up to 85% RH
    • Calibrated Measurement Range: +5 – 50 °C; up to 85% RH
  • Operating Pressure Range: 50 – 110 kPa
  • Inlet Flow Rate: 230 cm3/min (typical)
  • Communication: SDI-12
  • Power Requirements
    • Voltage: 9 – 33 VDC
    • Power: ≤1.5 W nominally; up to 26.4 W for 20 milliseconds during startup
  • Weight: 1.4 kg
  • Dimensions: 58 × 17.5 × 7.7 cm (H × L × W)
  • Mount: 1 inch (2.54 cm) diameter post; compatible with 1 inch (2.54 cm) crossover fittings
  • Weatherproof Rating: Tested to IEC IP54
  • Measurements
    • H2O Mole Fraction Range: 0 – 60 mmol/mol
    • H2O Mole Fraction Accuracy: 2% of reading at > 5 mmol/mol
    • Ambient Temperature Accuracy: ±1.5 °C
    • Ambient Pressure Accuracy: ±0.2 kPa
  • Installation Requirements
    • Separation Between LI-710s: ≥2 meters
    • Mounting Height: >2 meters above the plant canopy
  • Solar Power
    • Solar Panel: 100 Watt Monocrystalline
    • Battery: 12V, 100Ah AGM
    • Battery Weight: 25Kg (55 lbs.)
    • Charger: 9A MPPT (Maximum Power Point Tracking) Charger
  • Auxiliary Power Input
    • Input Voltage Range: 9 to 33 V
    • Maximum Current: 2.2 A
  • Digital Inputs/Outputs
    • SDI-12 Eddy Covariance Sensor: 1
    • SDI-12 ports for other sensors: 2
    • Output Voltage: 12 V
    • Maximum Total Current: 2.5A
    • Micro USB port for firmware updates
  • Mast
    • Maximum Height w/ LI-710: 5M (198 in.)
    • Maximum Load on Mast: 4.54 kg (10 lbs.)
  • Data
    • Data Storage: Removable Industrial Micro SD card; 8 GB.
    • Message Buffer: If the modem is offline, data is stored until connectivity is restored.
    • Data Format: Text, Comma-separated Values (CSV)
    • GNSS (GPS) Support: GPS receiver for time synchronization and location information
  • Cellular
    • LTE CAT1
    • Data Transfer Frequency: Data sent every half-hour
    • Regional Approvals:
      • USA
      • EU
      • UK
      • Norway
      • Greenland
      • Switzerland
      • Canada

Specifications subject to change without notice.

Output Variables

Variable Description Unit
ET Actual Evapotranspiration mm
LE Latent Energy Flux W/m2
H Sensible Heat Flux W/m2
VPD Vapor Pressure Deficit kPa
Pa Atmospheric Pressure kPa
Ta Air Temperature °C
RH Relative Humidity Ambient %
AH Absolute Humidity Ambient g/m3
SVP Saturated Vapor Pressure Ambient kPa
Td Dewpoint °C