Solar radiation measurement stations

TBQ Total Radiation

It is mainly used to measure the total solar radiation with a wavelength range of 0.3 to 3 microns. If placed horizontally downward, it can measure reflected radiation, and if a scattered light shielding ring is added, it can measure scattered radiation.

It consists of a double-layer quartz glass cover, a sensing element, a shading plate, a meter body, a desiccant, etc. The sensing element is the core of the meter, and it is composed of a fast-response winding electroplating thermopile. The sensing surface is painted with 3M matte black paint. The sensing surface is a hot junction. When the sun shines, the temperature rises, and it forms a temperature difference electromotive force with the cold junction on the other side, which is proportional to the intensity of solar radiation.

Test range: 0～2000W/m2

Resolution 1W/㎡

Accuracy ±5%

Sensitivity: 7～14μV／wm-2

Response time: ≤35 seconds (99%)

Internal resistance: about 350Ω

Spectral range: 0.3～3μm.

Annual stability: ±2% Internal resistance about 350Ω

Cosine response: ≤±7% (when the solar altitude angle is 10°)

Azimuth response error: ≤5% (when the solar altitude angle is 10°)

Working environment temperature: -40℃～+50℃

UV radiation sensor

The photoelectric detector is used to receive the ultraviolet light wave electrical signal. This product is a precision instrument used to measure the solar ultraviolet radiation (UVAB wavelength range) in the atmosphere.

Measuring range: 0～400mW/m2

Spectral range: 280～400nm

Power supply: DC 5V/DC12V

Output form: Voltage: 0-2.5V, RS485

Working environment: temperature -50℃～50℃

Fully automatic direct radiation

The radiation measured vertically on the solar surface (viewing angle of about 0.5°) and the scattered radiation in a very narrow ring of sky around the sun is called direct solar radiation, which is measured using a direct radiation meter.

1. Sensitivity: 7～14μV∕Wm-2

2. Time constant: ≤15S (99%);

3. Internal resistance: about 80 ohms;

4. Tracking accuracy: <168h±1°;

5. Opening angle: 4°;

6. Annual stability: ±1% (sensitivity change rate);

7. Working environment: -45℃～+45℃;

8. Power supply: DC12V;

9. Measuring range: 0~2000W/m2;

10. Signal output: 0~20mV;

11. Measurement accuracy: working table <5%; standard table <2%;

12. Power polarity: Red +DC12V Black 0

Diffuse Radiation

It consists of two parts: the pyranometer and the sunshade ring. The sunshade ring is used to ensure that it can continuously block direct solar radiation from sunrise to sunset. The sunshade ring consists of a sunshade ring, a ruler, a screw adjustment screw, a bracket, and a chassis. The sunshade ring is 65mm wide and 400mm in diameter. It is fixed on the screw adjustment screw of the ruler, and the latitude and declination scales are engraved on the ruler. The ruler and the bracket are fixed on the chassis and should be fixed according to the geographical latitude of the mounting location.

Test range: 0~2000W/m2, resolution 1W/㎡, accuracy ±5% Sensitivity: 7~14μV/wm-2 Response time: ≤35 seconds (99%) Internal resistance: about 350Ω Spectral range: 0.3~3μm. Annual stability: ±2% Internal resistance about 350Ω Cosine response: ≤±7% (when the solar altitude angle is 10°) Azimuth response error: ≤5% (when the solar altitude angle is 10°) Working environment temperature: -40℃~+50℃

Net radiation

The new net pyranometer is used to measure the net difference between the full-band radiation projected downward from the sky and the full-band radiation projected upward from the earth's surface. The measurement range is 0.3 to 3 microns of short-wave radiation and 3 to 50 microns of earth radiation. It is mainly used to study the state of the earth's heat balance and can be applied to meteorological research, thermal stress and heat balance research, and highway road condition monitoring.

The working principle of this meter is the thermoelectric effect. The sensing part is a thermopile made of copper-plated constantan wire, and the top of the thermopile is painted with 3M matte black paint. The two thermopiles receive solar radiation and earth radiation respectively. Due to the different radiation intensities absorbed by the upper and lower sensing surfaces, a temperature difference is generated at both ends of the thermopile, and its output electromotive force is proportional to the difference in radiation intensity received by the sensing surface.

In order to prevent the influence of wind and rain on the output of the radiation meter and to protect the sensing surface, the meter is equipped with a hemispherical special polyethylene film cover that can transmit both short-wave radiation (0.3 to 3 microns) and long-wave radiation (3 to 100 microns).

1. Spectral range: 3~50μm (long wave radiation)

2.0.3～3μm (shortwave radiation)

3. Measurement range: -300～+1000W/m2

4. Response time: ≤35 seconds (99%)

5. Internal resistance: about 350Ω

6. Annual stability: ≤±2%

7. Consistency of sensing surface: ±15%

8. Temperature characteristics: ±2% (-20℃～+40℃)

9. Chassis diameter: Φ120mm

10. Length: 307mm

11. Polyethylene film cover: Φ33mm

Sunshine hours sensor

It is used to continuously measure the sunshine hours. When the direct radiation on the instrument is greater than a preset threshold, it is automatically recorded by the collector as the sunshine hours. The instrument itself has no moving parts and low power consumption, and is suitable for long-term observation in the field.

Count the sunshine every minute, and reset at 0:00 every day.

Measuring range: 0～24h

Resolution: 0.1h

Spectral range: 0.3～3μm

Response time: <5s

Cosine response: <±10% (when the sun altitude angle is 10°)

Non-linearity: <±2%

Annual change rate: <±2%

Power supply: DC5V

Output type: RS485

Working environment: temperature -50℃～85℃, humidity ≤100%RH

Photosynthetically Active Radiation Table

Also known as the photon number, it is mainly used to measure the photosynthetically active radiation of natural light in the wavelength range of 400 to 700nm. It is easy to use and can be directly connected to a digital voltmeter or data logger and can be used under all-weather conditions.

The meter uses a silicon photodetector and passes through a 400-700nm optical filter. When light is irradiated, it generates a voltage signal proportional to the incident radiation intensity, and its sensitivity is proportional to the cosine of the direct angle of the incident light.

Spectral range: 400～700nm

Range: 0-2000 W/m2

Power supply: DC 5V

Output form: Voltage: 0~2.5V/RS485

Response time: about 1s (99%)

Temperature dependent: Maximum 0.05%/°C

Cosine correction: up to 80° angle of incidence

Operating temperature: -40° to 65°

Relative humidity: 0~100%