Biomet System and Sensors
LI‑COR® eddy covariance systems support a full complement of additional biomet sensors. Data from these sensors are time synchronized with gas analyzer and sonic anemometer data and logged in GHG eddy covariance data files1, so they can be used for gap filling and interpreting flux results. They are summarized with EddyPro® output and also can be evaluated independently of the eddy covariance data set.
The biomet system includes a datalogger (Sutron Corp., Sterling, VA) and a pre-configured enclosure with mounting hardware. Installed components include circuit breakers, relay switches, terminal blocks, and grounding connections. It has an Ethernet connection for data transfer and collection on the LI‑7550. Space is also available for the addition of network switches and/or cell modem communication devices.
Biomet Backup Battery System
A 12V backup battery system enables the biomet system to continue operating for 2 to 3 days if the primary power supply fails. This ensures that you have biomet records even if there are gaps in other measurements. The Biomet Backup Battery System is an optional add-on to new systems and is available as a retrofit kit for existing systems.
- Continue logging biomet data for gap filling flux measurements
- Powers biomet system for 2 to 3 days without main power
- Automatically disables high-draw sensors, extending the life of the backup battery
- Recharges the backup battery when main power is on and switches to the backup battery if the main power fails
The biomet system is available with a choice of four sensor packages to meet the needs of typical eddy covariance setups. To simplify setup and eliminate programming, the biomet system is provided with pre-written programs for each of the sensor packages available. Alternatively, the biomet system can be customized to record measurements from almost any sensor at your research site - and from a nearly unlimited number of sensors.
|Biomet 100||Biomet 101||Biomet 102||Biomet 103|
|Humidity and Temperature Probe (Vaisala HMP155) and Radiation Shield (RM Young)||1||1||1||1|
|Tipping Bucket Rain Gauge (Texas Electronics TR-525M)||1||1||1||1|
|Quantum Sensor (LI‑COR LI‑190R)||1||1||1||1|
|Pyranometer (LI‑COR LI‑200R)||1||-||1||-|
|Soil Moisture and Temperature Probe (Stevens Hydra Probe II)||3||3||3||3|
|Net Radiometer (single component Kipp & Zonen NR Lite2)||1||-||1||-|
|Net Radiometer (four component Kipp & Zonen CNR4)||-||1||-||1|
|Soil Heat Flux Plates (Hukseflux HFP01)||3||3||-||-|
|Self-Calibrating Soil Heat Flux Plates (Hukseflux HFP01SC)||-||-||3||3|
|Summary:||Basic biomet sensors for eddy covariance stations||Basic biomet sensors with 4-component net radiation measurements||Basic biomet sensors with self-calibrating soil heat flux sensors||Advanced biomet sensors with 4-component net radiation and self-calibrating soil heat flux sensors|
Each sensor package includes the required number of expansion modules. Additional expansion modules are available if you want to add sensors to your site.
For research that requires biomet sensors other than those described above, any of the programs can be customized to suit your needs, or you can create custom programs to support whichever sensors you need at your research site.
Radiation and Light Measurements
Single-Channel Net Radiometer Kipp & Zonen® NR Lite2 – The NR Lite2 is a simple, low cost sensor that measures net radiation.
Four-Channel Net Radiometer Kipp & Zonen® CNR4 – This net radiometer measures incoming and reflected radiation, in both short and long wavebands.View Data Sheet
- Optional: CNF4 Heater and Ventilation Unit – Provides controlled temperature and ventilation for the CNR4, to improve the accuracy of measurements.
Quantum Sensor LI‑COR LI‑190R – Measures Photosynthetically Active Radiation (PAR), which is the 400-700 nm range of light.
Pyranometer LI‑COR LI‑200R – For measurements of global solar radiation.
Soil Moisture Probe Stevens Hydra Probe II – A robust sensor for accurate soil moisture measurements.View Data Sheet
Soil Moisture Probe Decagon Devices EC-5 – A lower cost alternative for soil moisture measurements.
Soil Temperature Sensor LI‑COR® 7900-180 – Soil temperature sensor for long-term measurements of soil temperature.
Soil Heat Flux Plates Hukseflux® HFP01 – Passive measurements of heat exchange in soil.View Data Sheet
Self-Calibrating Soil Heat Flux Plates Hukseflux® HFP01SC – Passive measurements of heat exchange in soil, with automated calibration.View Data Sheet
Ambient Air Temperature and Humidity Measurements
Relative Humidity and Temperature Probe Vaisala® HMP155G – Measures air temperature and relative humidity.View Data Sheet
14-Plate Radiation Shield R.M. Young® – Shields the temperature and relative humidity sensors from direct sunlight.
Tipping Bucket Rain Gauge Texas Electronics TR‑525M – Measures liquid precipitation.View Data Sheet
- The GHG eddy covariance file type (with a .ghg extension) is a compressed eddy covariance data file that can be read directly by EddyPro™. GHG files include all the information that is required to compute fluxes, including wind speed measurements, gas concentration/density measurements, site information, and optional biological and meteorological data. Learn more