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TBS Direct Normal Irradiance (DNI) Sensor

Direct Normal Irradiance (DNI) Sensor

This is a Direct Normal Irradiance (DNI) Sensor, model: BGT-DNI.

This Sensor is a precision first-class pyrheliometer designed to measure the solar radiation coming directly from the sun, within a very narrow field of view. This instrument is the definitive tool for acquiring high-accuracy beam radiation data, complying with the stringent international standard ISO 9060:2018 (First Class specification). Its robust construction ensures reliable performance even in harsh environmental conditions, making it the ideal choice for critical scientific and industrial applications where precise DNI measurement is paramount.

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Direct Normal Irradiance sensor DNI sensor pyranometer sensor

Product Description

Product Parameters

Application Scenarios

Description:

This Direct Normal Irradiance (DNI) Sensor acts like a high-powered telescope for the sun's energy. It precisely tracks the sun to measure only the light that comes straight from its disk, filtering out the diffuse sky light. This data is essential for evaluating the true potential of concentrated solar power and for high-precision atmospheric research.

Key Product Selling Points

1.Unmatched Accuracy & First-Class Certification

Customer's Question: "Is this data reliable enough for my critical research or project validation?"Our Solution: As an ISO 9060 First Class pyrheliometer, it meets the highest international standards for accuracy and performance. This certification ensures your measurements are trusted for scientific publishing, bankable energy yield assessments, and system efficiency calculations.

2.Engineered for Precision & Stability

Customer's Question: "How does the design ensure accurate and stable readings?"Our Solution: The sophisticated optical system features seven baffles to minimize internal reflection and restrict the field of view. A sealed inner tube and desiccant cartridge protect the thermopile sensor from temperature fluctuations and moisture, guaranteeing long-term stability and reducing measurement drift.

3.Fast Response for Dynamic Conditions

Customer's Question: "Can it keep up with rapid changes in irradiance, like passing clouds?"Our Solution: The fast-response wire-wound thermopile delivers precise readings even under rapidly changing solar conditions, capturing the true dynamics of the solar resource.

4.Built for Harsh & Demanding Environments

Customer's Question: "Will it survive long-term deployment in extreme weather?"Our Solution: Constructed with durability in mind, it is built to perform reliably in a wide range of challenging environments, from desert heat to polar cold.

5.Optical Quality for Specific Measurement

Customer's Question: "What part of the solar spectrum does it measure?"Our Solution: The high-transmittance JGS3 quartz window allows an exact spectral range of 0.27 to 3.2 μm to pass through, ensuring measurements are focused on the most relevant wavelengths for solar energy conversion.

TBS Direct Normal Irradiance (DNI) Sensor - Technical Specifications

Parameter	Specification
Spectral Range	280 ~ 3000 nm
Measuring Range	0 ~ 2000 W/m²
Sensitivity	7 ~ 14 μV/W·m⁻²
Response Time (Time Constant)	≤ 6 sec (99%)
Field of View (Opening Angle)	4°
Annual Stability (Sensitivity Change)	≤ ±1%
Internal Resistance	10 ~ 30 Ω
Output Signal	Analog: 0 ~ 20 mV Digital: RS-485 (Modbus) Analog: 4 ~ 20 mA
Power Supply	0-20 mV: None (Passive) RS-485: 9 ~ 30 V DC 4-20 mA: 9 ~ 30 V DC
Accuracy	< 2%
Standard Cable Length	3 meters
Operating Temperature	-40℃ ~ +70℃
Operating Humidity	0 ~ 100% RH
Cable Rating	Rated Voltage: 300 V
Weight	380 g

Concentrated Solar Power (CSP) & Concentrated Photovoltaics (CPV):

Solves the question: "What is the exact energy flux available for my concentrating system?"

Use Case: Essential for resource assessment, system design, and real-time performance monitoring of all concentrating technologies, as they only use direct beam radiation.

High-Precision Solar Resource Assessment:

Solves the question: "How do I get bankable DNI data for project financing?"

Use Case: Providing the critical data required for energy yield forecasts and financial modeling of utility-scale solar projects.

Atmospheric & Climate Research:
Solves the question: "How do aerosols, dust, and water vapor affect the atmosphere's transparency?"

Use Case: Used in research stations (including polar, alpine, and marine environments) to study aerosol optical depth, atmospheric turbidity, and their impact on climate.

Solar Laboratory & Calibration Reference:
Solves the question: "What can I use as a primary standard to calibrate other radiometers?"

Use Case: Serves as a reference instrument in lab settings for calibrating other broadband radiation sensors due to its first-class accuracy.

Advanced Building Science (Solar Architecture):
Solves the question: "What is the exact solar heat gain on my building's facade?"
Use Case: Precisely measuring direct solar load on building structures and windows to optimize passive solar design and high-performance building envelopes.

Note on Installation: For optimal performance, this sensor must be mounted on a precise solar tracker to continuously follow the sun. The installation site must have a completely unobstructed view of the sun's path from sunrise to sunset.

Further details , please contact us !