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Contact us
Shandong Fengtu IOT Technology Co., Ltd
Sales Manager:Ms. Emily Wang
Cel,Whatsapp,Wechat:+86 15898932201
Email:info@fengtutec.com
Add:No. 155 Optoelectronic Industry Accelerator, Gaoxin District, Weifang, Shandong, China
4-Component Net Radiometer
Model:FT-FS7H
Brand:fengtu
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1. 4-Component Net Radiometer Product Overview
4-Component Net Radiometer measures the net difference between the amount of full-wave radiation projected downward from the sky and upward from the Earth's surface.In meteorological applications, infrared radiation or long-wave radiation refers to electromagnetic radiation with a wavelength greater than 3.0 μm. Long-wave radiation is physically related to temperature and is emitted by all objects on Earth. The spectrum of the sun's short-wave radiation is from 300 nm to 3 μm (accounting for 99.5% of the total solar radiation).
Fengtu's FT-FS7H four-component net radiation sensor directly measures daily longwave radiation and shortwave radiation and calculates the net radiation. It is used for meteorological observations of atmospheric radiation (radiation emitted by clouds/water vapor and carbon dioxide, etc.) and net radiation exchange between the earth and the atmosphere. Net total radiation (shortwave + longwave) is usually measured by 4 net radiometers or a single net radiometer (whose detector can respond to the full band). The earth's longwave radiometer uses a detector with a hemisphere facing upward to measure the longwave radiation emitted downward. The net longwave radiation and the downward emitted radiation of the earth-atmosphere system can be calculated. It has been widely used in meteorology/photovoltaics/horticulture/agriculture and industry.
2. Features of 4-Component Net Radiometer
1. Comply with the WMO World Meteorological Organization Guide (CIMO Guide)
2. Strong sensitivity to infrared radiation with a wavelength of 4 to 50 µm
3. The error caused by the heat of the silicon cover is small
4. Small cosine response error
5. Reduce environmental impact
6. Good stability
3. 4-Component Net Radiometer Technical Specifications
Technical Parameters | Technical Description |
Total radiation | |
Grade Standard | FIRST CLASS |
Time response (95%) | 13s |
Thermal radiation zero offset | ±10W/m2 |
Temperature change zero 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 sampling 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 |
Instability (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 (when solar radiation is 1000W/m2) |
Signal range | -500~+500 W/m² |
Signal output | -20~0mV |
General Parameters | |
Number of channels | 4 channels mV, 2 channels 4-wire platinum resistance |
Temperature Sensor | Linear platinum resistance (JIS standard: c-1604-1989) |
Operating temperature | -40~+70℃ |
weight | 9kg |
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