Haze refers to the ratio of scattered light flux deviating from the incident light direction to the total luminous transmitted light flux through a sample, expressed as a percentage (%). It measures the degree to which light is scattered due to internal or surface irregularities in a material, resulting in a "cloudy" or "milky" appearance.
For transparent or semi-transparent materials (e.g., clear coatings), the haze value directly reflects the extent of light scattering caused by internal or surface defects (such as particles, micro-cracks, or unevenness). This helps engineers diagnose formulation or production issues (e.g., poor additive dispersion).
BGD offers two types of haze meters：Basic Haze Meter – Measures haze value and luminous transmittance only. Color Haze Meter – Combines haze measurement with spectrophotometric color analysis（measuring Lab, yellowness, whiteness, Gardner index, Pt-Co color, and dozens of other color parameters）.
Both types are widely used for haze and luminous transmittance testing in industries such as coatings, glass, plastics, films, displays, and packaging.
Standards
ASTM D1003 Standard Test Method for Haze and Luminous Transmittance of Transparent Plastics
ISO 13468 Determination of the Total Luminous Transmittance of Transparent Materials –Part 2: Double-Beam Instrument
ISO 14782 Plastics – Determination of Haze for Transparent Materials
Features
◆ 7-inch color touchscreen + Android OS for intuitive operation
◆ Dual-beam technology minimizes light source fluctuations, ensuring high precision and stability
◆ Compensation method for more accurate transmittance results
◆ Horizontal & vertical sample placement for versatile testing
◆ Open measurement area accommodates samples of any size
◆ Long-life LED light source (10+ years without replacement)
◆ Instant measurement – No warm-up needed, results in 1.5 seconds
◆ PC software included – Advanced data analysis and report generation for haze, color, and transmittance
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Technical Parameters |
Ordering Information |
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BGD 550/1 Haze Meter |
BGD 550/2 Color Haze Meter |
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Illuminating/Viewing Geometry |
Transmittance：0°/d （Parallel illumination, diffuse reception） |
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Light Source |
CIE-A、CIE-C、CIE-D65 |
Haze/Transmittance：CIE-A，CIE-C，CIE-D65Color：A，C，D50，D55，D65，D75，F1，F2，F3，F4，F5，F6，F7，F8，F9，F10，F11，F12，CMF，U30，DLF，NBF，TL83，TL84 |
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Measure Targets |
Haze and Luminous transmittance under ASTM & ISO standards |
HAZE，Luminous Transmittance，Spectral Luminous Transmittance，CIE Lab，LCh，CIE Luv，XYZ，Yxy，Hunter Lab MunsellMI，CMYK，Whiteness Index/WI（ASTM E313-00，ASTM E313-73，CIE/ISO，Hunter，Taube Berger Stensby），Yellowness Index/YI（ASTM D1925，ASTM E313-00，ASTM E313-73），Tint（ASTM E313-00），Metamerism Index（Milm），APHA，Pt-Co Index，Gardner Index，Color Difference（ΔE*ab，ΔE*CH，ΔE*uv，ΔE*cmc（2:1），ΔE*cmc（1:1），ΔE*94，ΔE*00） |
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Measuring Aperture |
7mm & 21mm |
21mm |
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Wavelength Range/Interval |
--- |
400nm~700nm（@10nm），LED |
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Integrating Sphere Dia. |
Φ154mm |
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Measurement Range |
0-100% |
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Measurement Repeatability |
Haze repeatability ≤0.05%（Haze＜10%），Haze repeatability≤0.1%（Haze ≥10%）；luminous transmittance repeatability ≤ 0.1% |
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Resolution |
0.01% |
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Sample Requirement |
No limitation for sample area，thickness ≤ 145mm |
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Data Storage Capacity |
Cloud-based unlimited storage |
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Interface |
USB |
USB-A， USB-B |
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Power Supply |
DC12V |
220V（with power source line） |
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Overall Size（L×W×H） |
310mm×215mm×540mm |
598mm×247mm×366mm |
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Optional Accessories |
Film Holder, Cuvette Holder, Panel Holder, Custom Apertures, Haze Standard Plates, Transmittance Standard Plates, etc. |
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