Description

LP PYRA 02 : Pyranometer (ISO 9060 1st Class)

LP PYRA 02 Pyranometers (ISO First Class) with calibration certificate, which fully comply with ISO 9060 standards, and meet the requirements defined by the World Meteorological Organization (WMO), The LP PYRA 02 Pyranometer measures the irradiance on a plane surface (Watt/m2). Measured irradiance is the result of the sum of direct solar irradiance and of diffuse irradiance. A 10 meter long cable complete with SICRAM module, These are strong and reliable ground-based instruments, especially designed to be used under all weather conditions.

Working Principle

LP PYRA 02 pyranometer is based on a thermopile sensor. The thermopile sensitive surface is coated with a black matt paint, which allows the pyranometer not to be selective at different wave lengths. The pyranometer spectral range is determined by the transmittance of the two glass domes type K5, Radiant energy is absorbed by the thermopile black surface, thus creating a difference of temperature between the center of the thermopile (hot junction) and the pyranometer body (cold junction). Thanks to the Seebeck effect, the difference of temperature between hot and cold junction is converted into a Difference of Potential. In order to grant the thermopile a proper thermal insulation from the wind and reduce the sensitivity to thermal irradiance, LP PYRA 02 is equipped with two concentric domes having a diameter of 50mm and 30mm, respectively. The domes protect the thermopile from the dust, which, laying down on the black surface, might change spectral sensitivity.

Recommended use:-

• Atmospheric research
• Weather stations, Climatology
• Energy saving research
• Productive efficiency test of photovoltaic plants, etc.

                                                     Technical Specification

ISO 9060 Classification :  First class

Detector  type : Based on a thermopile sensor

Measuring range : 0 to 2000 W/m2

Spectral range (50%) : 305 nm to 2800 nm

Typical sensitivity : 10 mV/( W/m2)

Operating temperature :  - 40 0C to 80 0C

Response time (95%) : < 28 sec.

Field of View : 1800 

Zero Off-set: (a) Response to thermal radiation (200Wm-2) : 15 W/m2

                      (b) Response to temperature change 5K/h : <± 4 W/m2

Non stability over 1 year : <± 1.5%

Non linearity : <± 1%

Cosine response : <±18 W/m2

Spectral selectivity : <±5%

Temperature response : < 4%

Tilt response : <± 2%

Impedance : 33Ω - 45Ω

Cable : 10 meter long cable complete with SICRAM module (The Cable can be extend up to 60 meter on request).

Weight : 0.90 Kg