Bowen Ratio Systems (Discontinued)

Bowen Ratio Enclosures

023/CO₂ Bowen Ratio Flow Controller

• Measures water vapor, carbon dioxide, and temperature gradients using energy balance Bowen ratio techniques
• Key system components:
  • CR23X Micrologger (purchased separately)
  • Li-Cor 6262 CO₂ and H₂O analyzer to measure gradients and absolute concentration of both CO₂ and H₂O (purchased separately from Li-Cor)
• Variables measured:
  • H₂O and CO₂ gradient
  • Air temperature (two heights) with 0.003 " thermocouples
  • Net radiation
  • Total soil heat flux
• 023/CO₂ includes:
  • Mounting bracket for LI-6262
  • Solenoid valves
  • Flow controllers
  • Soda lime and desiccant bottles
  • Diaphragm pump
  • 16 " x 18" enclosure

Sensors Arms

BRA/UPR Bowen Ratio Upper Arm

• Includes:
  • Air intake
  • One 25 um Air Intake Filter within holder
  • Thermocouple connector
  • 10 ft thermocouple wire
  • 7 ft air intake tubing
• Requires one TCBR-3 (purchased separately)

BRA/LWR Bowen Ratio Lower Arm

• Includes:
  • Air intake
  • One 25 um Air Intake Filter within holder
  • Thermocouple connector
  • 10 ft thermocouple wire
  • 7 ft air intake tubing
• Requires one TCBR-3 (purchased separately)

Sensors

Required Sensors

• Four TCBR-3 Bowen Ratio Thermocouple or two ASPTC Aspirated Thermocouples
• HFT3 Heat Flux Transducer (minimum of two)
• NR Lite Net Radiometer or CNR1 Net Radiometer
• TCAV Averaging Soil Thermocouple Probe (recommend one probe per pair of heat flux plates
• CS616 Water Content Reflectometer

Optional Sensors

• 05103-10 RM Young Wind Monitor
• HMP45C Vaisala RH and Temperature Probe
• 41002-2 RM Young 12-Plate Gill Radiation Shield
• LI200X LI-COR Silicon Pyranometer
• LI2003S LI-COR Pyranometer Base and Levelling Fixture

Additional System Components

Power

• MSX20 20 Watt Solar Panel with Mount
• MSX30R 30 Watt Solar Panel with Mount and Regulator

Tripod

• CM10 Tripod and Grounding Kit (10 ft)