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Help CenterTBB-1 Net Radiation Sensor
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1. Product Overview
The TBB-1 Net Radiation Sensor is a high-precision instrument designed for measuring the net radiation balance between the Earth’s surface and the atmosphere. Net radiation represents the thermal equilibrium of plant canopies and is the fundamental basis for evapotranspiration and photosynthesis. It is defined as the difference between incoming and outgoing solar and terrestrial radiation.
The sensor mainly measures:
Shortwave radiation (0.27–3 µm) from the sun
Longwave terrestrial radiation (3–50 µm) emitted by the Earth’s surface
The TBB-1 is a professional-grade instrument specifically designed for accurate net radiation measurement and is widely used in meteorology, agriculture, hydrology, environmental science, and architectural research.
2. Working Principle
The TBB-1 Net Radiation Sensor operates based on the thermoelectric effect.
The sensing element consists of two thermopiles made of copper wire.
Each thermopile has two black-coated absorbing surfaces—one facing upward and one facing downward.
The upper surface absorbs incoming solar radiation, while the lower surface absorbs terrestrial radiation from the ground.
Due to the different radiation intensities absorbed by the two surfaces, a temperature difference is generated, producing a proportional electrical signal output.
A positive value indicates net heat gain by the surface, while a negative value represents net heat loss.
This design ensures accurate measurement of net radiation and is suitable for long-term outdoor monitoring.
3. Key Features
High Accuracy
Uses advanced thermoelectric sensing elements combined with temperature compensation technology to achieve precise net radiation measurement.
Strong Stability
IP67 protection rating
All-metal body with electrostatic spray coating for corrosion resistance
Suitable for extreme environmental conditions
Durable Optical Filter
Made from high-transparency hard material
Fully sealed, airtight, maintenance-free
Long service life, ideal for long-term outdoor use
Flexible Output Options
Supports analog and digital outputs
Can be integrated with multiple data loggers and cloud platforms
Compact and Integrated Design
Small size, easy installation
Suitable for various environmental monitoring applications
Built-in Temperature Compensation
Reduces the influence of ambient temperature changes on measurement accuracy
Zero-Power Operation Mode
Can operate without external power supply
Standalone or System Integration
Can be used independently or integrated into a complete meteorological station
4. Technical Specifications
| Parameter | Specification |
|---|---|
| Spectral Range (Longwave) | 3000–50000 nm |
| Spectral Range (Shortwave) | 280–3000 nm |
| Measurement Range | −2000 to +2000 W/m² |
| Output Signal | −20 to +20 mV (RS485 optional with transmitter) |
| Sensitivity | 7–14 µV / W·m² |
| Response Time | ≤ 18 s (99%) |
| Internal Resistance | ~350 Ω |
| Annual Stability | ≤ ±2% |
| Surface Uniformity Error | ±15% |
| Weight | 0.86 kg |
5. Standard Solar Radiation Observation Site
The manufacturer operates a 1500 m² standardized solar radiation observation field, featuring:
Flat, open terrain with no surrounding obstructions
No shading from buildings or human structures
Fully compliant with international solar radiation monitoring standards
Provides reliable calibration and testing conditions
Ensures high accuracy and long-term stability of all radiation sensors
6. Typical Applications
The TBB-1 Net Radiation Sensor is widely used in:
Meteorological radiation balance research
Solar thermal water heating and solar energy engineering
Solar architecture and building energy studies
Environmental radiation balance research
Soil evaporation and evapotranspiration studies
Agricultural ecosystem monitoring
7. Application Cases
8. About Company
Need more information? Feel free to leave a message or contact us.
Sales Manager: Xie Meng
Email: xiemenghit@gmail.com
Whats app: +1(416)8260959
Website: www.sunweather.ca
TikTok:
QQ: 619243274
WeChat: 619243274
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