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Help CenterTBS-2-2 Solar Direct Radiation Pyranometer Pyrheliometer for PV Environmental Monitor RS485 Output
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1. Product Overview
The pyrheliometer is designed to measure the solar direct radiation—including the radiation on the surface perpendicular to the sun (with a viewing angle of approximately 0.5°) and the scattered radiation from the narrow annular sky around the sun—with a spectral range of 0.3μm to 3μm. Equipped with a high-precision automatic tracking device, the pyrheliometer features a rotational angle error of less than 0.25° (equivalent to less than one minute of arc) within a week. With proper installation, it enables accurate automatic solar tracking with easy operation and high measurement precision. It is widely applicable to sectors such as solar energy utilization, meteorology, agriculture, building materials, and ecological surveys.
It can be connected to a sunshine duration recorder to directly measure the sunshine duration when the solar direct radiation intensity exceeds 120 W/m².
2. Working Principle
The TBS-2-2 Pyrheliometer mainly consists of an optical tube and an automatic tracking device. The interior of the optical tube is composed of seven diaphragms, an inner cylinder, a thermopile (sensing surface), a desiccant cartridge and other components. The seven diaphragms serve to reduce internal reflection, form the aperture angle of the instrument and restrict air turbulence inside the instrument. The inner cylinder is fitted outside the diaphragms, which seals the dry air between the inside of the diaphragms and the outer cylinder to minimize the impact of ambient temperature on the thermopile. A JGS3 quartz glass plate is mounted on the cylinder, which is transparent to radiant light with a wavelength of 0.27–3.2μm and facilitates the measurement of solar direct radiation. A desiccant is installed inside the cylinder to prevent the formation of moisture condensation.
The sensing component at the core of the optical tube is a wire-wound electroplated multi-junction thermopile, whose surface is coated with a high-absorptivity black coating. The hot junctions are located on the sensing surface and the cold junctions in the body; the temperature difference potential generated within the linear range is proportional to the solar direct irradiance.
The automatic tracking device is composed of a base plate, a latitude bracket, a motor and other components. The motor acts as the power source, and users can select either a DC motor or an AC motor as required. The tracking accuracy of the instrument is closely related to proper installation and careful adjustment; for detailed instructions, refer to the product manual.
3. Functional Features
1. All-metal body with electrostatic spray coating on the surface, featuring strong corrosion resistance;
2. Triple scale calibration for latitude, true solar time and solar declination angle, ensuring the pyrheliometer accurately tracks the sun throughout the day;
3. High-precision stepper motor with low cumulative error and minimal manual intervention;
4. Solar radiation measurement based on the photothermal principle, with high precision and low environmental interference;
5. JGS3 quartz glass plate adopted for precise solar light filtration;
6. Dual power supply modes (AC and DC) available;
7. Standard 0–20 mV signal output; the instrument can output 4–20 mA, RS485 and other signals when matched with a transmitter, and customized production is also available according to user requirements.
4. Technical Parameters
Parameter |
Specification |
Sensitivity |
7～14 μV/(W·m⁻²) |
Spectral Range |
0.3 μm～3 μm |
Response Time |
≤30 s (99%) |
Internal Resistance |
Approx. 100 Ω |
Measurement Range |
0～2000 W/m² |
Tracking Accuracy |
＜±1° within 24 hours |
Stability |
±2% |
Temperature Characteristic |
±2% (-20℃～+40℃) |
Weight |
5 kg |
Power Supply Voltage |
DC 12 V ±15%；AC 220 V ±10% |
Measurement Accuracy |
±2% |
Signal Output |
0～20 mV (4～20 mA or RS485 signal available with a transmitter) |
5. Solar Radiation Observation Field
Our company owns a 1500 m² standard solar radiation observation field with a flat and open surrounding area, free from building obstructions and human interference. It fully meets the on-site requirements for solar radiation monitoring instruments, providing a standard testing environment for the outdoor testing and calibration of solar radiation sensors, and ensuring the accuracy and validity of test data.
6. Application Cases
For more information, please contact me.
Jinzhou Sunshine Meteorological Technology Co., Ltd
Address: No. 15 Donghai Avenue,Jinzhou,Liaoning,China
Sales Manager : Ms. Zhang
Email: Jzyg322@gmail.com
Whatsapp:+86 15841668971
Wechat: 15841668971
Send Inquiry to This Supplier
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