Atomfair Architectural Glass Visible Light Transmittance & Shading Coefficient Tester
Product Overview
Atomfair Architectural Glass Visible Light Transmittance & Shading Coefficient Tester is a high-precision optical testing equipment developed in accordance with international general standards, specifically designed for the comprehensive detection of optical and thermal properties of architectural glass, energy-saving coated glass, photovoltaic glass and other products. Covering the full ultraviolet-visible-near infrared band, the equipment can complete multi-dimensional core parameter determination in one stop, with test data accuracy comparable to international testing requirements. It is widely used in glass production quality inspection, construction engineering acceptance, green building energy conservation evaluation, building materials scientific research experiments and other fields, providing professional and reliable technical support for glass optical performance testing.
Core Functions
- Integrated Multi-Parameter Detection: Accurately measures key indicators such as visible light transmittance, direct solar transmittance/reflection ratio, total solar transmittance, ultraviolet transmittance and shading coefficient without the need for multiple equipment cooperation;
- Full-Waveband Precise Scanning: Covers the complete 300nm~2500nm band, supports multi-level sampling interval adjustment to adapt to different precision detection needs, with no deviation in data collection;
- Flexible Dual-Mode Adaptation: Supports two core measurement modes (transmittance, reflectance), compatible with various architectural glass, automotive glass, photovoltaic glass and other samples, with strong practicality;
- Efficient Data Management: Test data is automatically calculated and counted, supporting fast export, storage and standardized report generation, which can be directly used as the basis for quality inspection filing or scientific research archiving.
Technical Parameters (International Standard)
| Item</ | Specification</ |
|---|---|
| Wavelength Range | 300nm~2500nm full-waveband coverage |
| Wavelength Accuracy | 360nm~900nm: ≤±0.3nm; 900nm~2500nm: ≤±1nm |
| Wavelength Repeatability | ≤0.1nm |
| Spectral Bandwidth | 300nm~1100nm: 1.5nm; 1100nm~2500nm: 2.5nm |
| Photometric Accuracy | ≤±0.5%τ |
| Photometric Repeatability | ≤0.2%τ |
| Stray Light | ≤0.1%τ at 340nm; ≤0.05%τ at 400nm~2500nm |
| Photometric Range | 0~3A absorbance range |
| Sampling Interval | 0.1nm, 0.2nm, 0.5nm, 1nm, 2nm, 5nm, 10nm (multi-level adjustable) |
| Measurement Modes | Transmittance, Reflectance |
| Grating Configuration | UV/VIS band: 1200L/mm; NIR band: 300L/mm |
| Receiver | PMT (ultraviolet-visible light region), PbS (near-infrared light region) |
| Data Interface | USB2.0 (compatible with 3.0) |
| Supported Systems | Windows XP, Windows 7, Windows 8, Windows 10 |
| Dimensions | 730mm × 650mm × 260mm |
| Equipment Weight | 28Kg |
Product Features
- International Standard Adaptation: Developed with reference to international general testing standards throughout, no national standard-related expressions, test results can be adapted to global glass quality inspection and certification needs;
- Excellent Detection Precision: Core optical parameters (wavelength accuracy, photometric repeatability, etc.) meet international high standards, strict control of stray light, and true data without deviation;
- Simple & Easy to Operate: No complex professional training required, the software interface is intuitive and easy to understand, automatically generating data results, greatly improving detection efficiency;
- Stable, Durable & Wide Adaptability: Rugged body structure, stable performance of core optical components, meeting multiple scenarios such as laboratory fixed detection and on-site mobile sampling inspection, with long service life;
- Outstanding Cost-Effectiveness: Integrates multiple core detection functions, avoiding repeated purchase of multiple equipment, reducing detection costs, and adapting to different needs such as industrial mass production and scientific research experiments.
Applicable Detection Scope
- Optical and thermal performance testing of various architectural flat glass, coated glass, Low-E energy-saving glass and insulated glass;
- Transmittance, reflectance and shading coefficient determination of automotive safety glass and photovoltaic glass;
- Factory quality inspection, engineering acceptance and energy-saving parameter verification of glass deep-processing products;
- Optical performance research and test analysis of glass in the field of building materials scientific research.
If you’re interested, have any questions, or have specific customization requirements, please feel free to contact us at inquiry@atomfair.com.
This instrument requires a controlled environment free of excessive dust, vibration, and ambient light to maintain measurement accuracy. The optical bench must be level and stable, and the sample surface must be clean and free of fingerprints or debris before testing.
- Environmental Stability Requirement: Operate the instrument in a clean, vibration-free environment with controlled ambient lighting to prevent stray light interference and ensure photometric repeatability.
- Sample Surface Preparation: Clean the glass sample surface thoroughly to remove dust, oil, or other contaminants that could scatter light and compromise transmittance or reflectance measurements.
- Warm-Up and Calibration Protocol: Allow the instrument to warm up for at least 30 minutes and perform a baseline calibration using a reference standard before initiating any measurement series.
This procedure outlines the essential steps to configure the instrument, run a measurement, and export results. Proper setup and sample handling are critical for obtaining reliable data.
Required Equipment: Atomfair Glass Tester with USB2.0 interface, Personal computer with Windows 7 or later, Lint-free wipes and optical-grade cleaning solution
- Power On and Warm Up
Power on the instrument and connected computer, then allow the light source and detectors to warm up for at least 30 minutes to achieve thermal stability. - Launch Software and Set Parameters
Open the provided software, select the appropriate measurement mode (transmittance or reflectance), and set the wavelength range and sampling interval (e.g., 1 nm) according to your testing standard. - Perform Baseline Calibration
Place the reference standard (air or calibrated mirror) in the sample path and run the baseline calibration to establish a zero reference for the measurement. - Clean and Position the Sample
Clean the glass sample surface with lint-free wipes and optical-grade solution, then place it securely in the sample holder, ensuring it is perpendicular to the incident beam. - Run the Measurement
Initiate the spectral scan and wait for the instrument to complete the full 300–2500 nm acquisition, monitoring the real-time data for any anomalies. - Export and Review Data
Review the generated transmittance, reflectance, and shading coefficient values, then export the data in the required format for reporting or further analysis.
How does the spectral bandwidth variation between the UV/VIS and NIR ranges affect measurement accuracy for architectural glass?
The instrument uses a spectral bandwidth of 1.5 nm in the 300–1100 nm range and 2.5 nm in the 1100–2500 nm range. This optimized difference balances resolution and signal-to-noise, ensuring accurate determination of visible transmittance and solar heat gain across the full 300–2500 nm band. For architectural glass, the critical visible (380–780 nm) and near-infrared (780–2500 nm) regions are measured with sufficient precision to compute shading coefficients reliably, with wavelength repeatability of ≤0.1 nm and photometric repeatability of ≤0.2%τ.
How is the shading coefficient calculated from the measured spectral data?
The shading coefficient is derived from the direct solar transmittance measured across the 300–2500 nm range. The instrument automatically calculates total solar transmittance by integrating the spectral transmittance weighted by the solar spectral irradiance, then normalizes to the standard 3 mm clear glass reference following international calculation methods. This process eliminates the need for manual computations and supports direct use in green building energy evaluation.
How does the dual-detector system (PMT and PbS) ensure data continuity across the full wavelength range?
The instrument uses a photomultiplier tube (PMT) for the UV/visible region (300–1100 nm) and a lead sulfide (PbS) detector for the near-infrared region (1100–2500 nm), with dual gratings (1200 L/mm for UV/VIS, 300 L/mm for NIR). Automatic detector switching at the crossover point, combined with wavelength accuracy of ≤±0.3 nm (360–900 nm) and ≤±1 nm (900–2500 nm), ensures seamless spectral data without discontinuities. This design maintains photometric accuracy ≤±0.5%τ and stray light as low as ≤0.05%τ in the 400–2500 nm range.
This instrument integrates UV-VIS-NIR spectrophotometry with dual transmittance/reflectance modes to deliver full-spectrum (300–2500 nm) optical and thermal characterization of architectural and photovoltaic glass, including shading coefficient determination, in a single benchtop unit.
Positive
- Full-spectrum multi-parameter analysis: Covers 300–2500 nm in one scan, simultaneously measuring visible transmittance, direct and total solar transmittance, UV transmittance, and shading coefficient, eliminating the need for multiple instruments.
- High spectral and photometric accuracy: Wavelength accuracy of ≤±0.3 nm (360–900 nm) and ≤±1 nm (900–2500 nm) with photometric repeatability ≤0.2%τ ensures reliable, reproducible data for quality control and research.
Trade-offs
- Requires stable lab environment: The dual PMT/PbS detector system and precision optics demand controlled temperature and humidity to maintain specified accuracy; on-site mobile use may require additional environmental protection.
- Windows-only software compatibility: Operates only on Windows XP through 10, limiting integration with newer operating systems or Linux-based lab data systems without additional configuration.
Every advanced material, component, equipment, and instrument in our catalog is backed by rigorous testing. We maintain strict internal quality management frameworks and align with CE conformity metrics to deliver transparent, reproducible performance data via our public open-science repository.
To request raw batch performance data, submit formal vendor registration paperwork, or execute a fast-turnaround R&D manufacturing loop, contact us at inquiry@atomfair.com.
Item is dispatched under the Atomfair Shipping & Delivery Framework (Free worldwide shipping on orders over $59 USD excl. heavy equipment). Return is governed by the Atomfair Return & Refund Policy (7-day technical return window).
