Li-Cor LI-200R Pyranometer

DETAILS

The LI-200R measures Global Horizontal Irradiance (GHI) - the combination of Direct Normal Irradiance (DNI) and Diffuse horizontal irradiance (DHI). The sensing element measures sunlight in watts per square meter (W/m2) and provides a small current signal that is compatible with any Symphonie series data logger when equipped with a .

The LI-200R is an improved version of the popular Li-Cor LI-200SZ Pyranometer. The new sensor has several advantages:

  • Improved Cosine Response - The new design maintains sensitivity at greater angles of incidence, providing more accurate measurements when the sun is rising and setting.
  • Improved Cable - A new shielded, twisted cable design replaces the old coaxial cable. It has thicker insulation for improved durability and better sealing.
  • Improved Connector - New BNC cable connectors have reinforced strain relief to further improve durability.
  • Removable Cable and Base - The sensor and cable both detach from the sensor base, making it easier to send out for calibration or replace just the cable or just the sensor at your site.
  • Improved Sensor Housing - More robust water shedding and improved sealing prevent water ingress.

This kit includes a calibration certificate, leveling base, and 5 m (16.4 feet) cable.

SPECIFICATION

  LI-COR LI-200R PYRANOMETER (#10162)
Description
Sensor type Total solar radiation sensor
Applications
  • Solar resource assessment
  • Meteorological studies
  • Environmental monitoring
Sensor range 0 W/m2 to 3000 W/m2
Instrument compatibility All NRG data loggers.
Measurement range
  • SymphoniePRO measurement range = 0 W/m2 to 2200 W/m2, typical
  • Symphonie, SymphoniePLUS and SymphoniePLUS3 measurement range = 0 W/m2 to 1600 W/m2, typical
Signal conditioning module
  • SymphoniePRO with '0 to 160μA SE Input' P-SCM (#9129)
  • Symphonie, SymphoniePLUS and SymphoniePLUS3 loggers with LI-COR Pyranometer SCM (#3154)
Output signal
Signal type Microamp current proportional to total solar radiation
Sensitivity Typically 75 μA per 1000 W/m2
Linearity Maximum deviation of 1 % up to 3000 W/m2
Response time Less than 1 μs
Transfer function Included on calibration certificate
Calibration
  • Calibration sheet included with each sensor defines output in microamps per 1000 Watts/square meter
  • Calibrated against Eppley Precision Spectral Pyranometer (PSP) under natural daylight conditions. Absolute uncertainty under these conditions is +/-3 % typical, +/-5 % maximum
Output signal range 0 μA to 225 μA, typical
Performance characteristics
Cosine correction Cosine corrected up to 82° angle of incidence
Azimuth < +/- 1 % error over 360° at 45° elevation
Tilt No error induced from orientation
Installation
Mounting Mounts to tower with custom NRG side mounting boom and hose clamps
Tools required
  • Sheet metal shears or similar for hose clamps
  • 5/16 inch hex driver or flat blade screwdriver
  • 0.05 inch hex key (included); metric #4 allen wrench for level adjustment
Environmental
Operating temperature range -40 °C to 65 °C (-40 °F to 149 °F)
Temperature dependence +/- 0.15 % per °C maximum
Operating humidity range 0 % to 95 %, non-condensing
Physical
Connections 3 bare wire leads
Cable length 5 m (16.4 feet)
Weight 24 g (0.85 ounces)
Dimensions
  • 23.6 mm (0.93 inch) diameter
  • 36.3 mm (1.43 inch) height
Materials
Cable BL-type (3-wire bare leads)
Detector High-stability silicon photovoltaic
Enclosure Weatherproof anodized aluminum case with acrylic diffuser and stainless steel hardware