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1.4-Component Net Radiometer product overview
4-Component Net Radiometer directly measures the daily long and short wave radiation and calculates the net radiation.In meteorological applications, infrared radiation or long-wave radiation refers to electromagnetic radiation with a wavelength greater than 3.0 μm.Longwave radiation is physically related to temperature and is emitted by all objects on Earth.The spectral range of the sun's shortwave radiation is 300nm ~ 3μm (accounting for 99.5% of the total solar radiation energy).
Fengtu's FT-FS7H four-component net radiation sensor directly measures daily long-wave radiation and short-wave radiation and calculates the net radiation amount.For meteorological observations of atmospheric radiation (radiation emitted by clouds/water vapor, carbon dioxide, etc.) and the net radiation exchange between the Earth and the atmosphere.Net total radiation (shortwave + longwave) is usually measured by 4 net pyranometers or a single net pyranometer (its detector can respond to the entire wavelength range).Pyranometers measure downward emitted longwave radiation using a detector with a hemisphere pointing upward.The net longwave radiation and the downward emitted radiation from the earth-atmosphere system can be calculated.It has been widely used in the fields of meteorology/photovoltaic/horticulture/agriculture and industry.
2.Product features of 4-Component Net Radiometer
1.Comply with WMO World Meteorological Organization specifications (CIMO Guide)
2.Strong sensitivity to infrared radiation with a wavelength of 4~50µm
3.The heating effect of silicone cover has small error.
4.Cosine response error is small
5.Reduce environmental impact
6.Has better stability
3.Technical indicators of 4-Component Net Radiometer
| Technical parameters | Technical description |
| total radiation | |
| grade standards | FIRST CLASS |
| Time response (95%) | 13s |
| Thermal radiation zero offset | ±10W/m2 |
| Temperature change zero point offset | ±3W/m2 |
| nonlinear | ±1.5% |
| instability | ±1% |
| directional response | ±18 W/m2 |
| Spectral error | ±3% |
| Temperature response (-10~40℃) | 3% |
| tilt error | ±1% |
| Spectral response | 285~3000nm |
| Daily mining accuracy | <5% |
| resolution | 1W/m2 |
| Sensitivity | 7~14μV/W•m-2 |
| Signal output | 0~20mV |
| earth radiation | |
| Spectral response | 400~50000nm |
| Response time (sec)95% | <18s |
| Non-stability (change/year) | <2% |
| temperature coefficient | ≤±1%(-20℃~+50℃) |
| perspective | 180° |
| Sensitivity(µV/W/m²) | 2~150uV/Wm-2 |
| Impedance(Ω) | 20~140 |
| Window heating offset | <4W/m2 (solar radiation 1000W/m2) |
| Signal range | -500~+500 W/m² |
| Signal output | -20~0mV |
| General parameters | |
| Number of channels | 4 channels of mV, 2 channels of 4-wire platinum resistors |
| temperature sensor | Wire type platinum resistor (JIS standard: c-1604-1989 category) |
| working temperature | -40~+70℃ |
| weight | 9kg |