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Li-Cor LI-200R pyranometer
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 Symphonie® SCM Card.
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.
Li-Cor LI-200R Pyranometer (#10162) |
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DESCRIPTION |
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| Sensor type | Total solar radiation sensor |
| Applications |
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| Sensor range | 0 W/m2 to 3000 W/m2 |
| Instrument compatibility | All NRG data loggers. |
| Measurement range |
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| Signal conditioning module |
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OUTPUT SIGNAL |
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| 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 |
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| Output signal range | 0 μA to 225 μA, typical |
PERFORMANCE CHARACTERISTICS |
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| 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 |
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| Mounting | Mounts to tower with custom NRG side mounting boom and hose clamps |
| Tools required |
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ENVIRONMENTAL |
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| 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 |
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| Connections | 3 bare wire leads |
| Cable length | 5 m (16.4 feet) |
| Weight | 24 g (0.85 ounces) |
| Dimensions |
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MATERIALS |
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| Cable | BL-type (3-wire bare leads) |
| Detector | High-stability silicon photovoltaic |
| Enclosure | Weatherproof anodized aluminum case with acrylic diffuser and stainless steel hardware |
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