Two Standard Methods in one Unit
The haze-gard dual objectively measures Total Transmittance and Transmission Haze according to two international specifications:
- ISO 13468 Compensation method
- ASTM D1003 Non-compensated method
Fast Measurement of a Variety of Samples
Open sample area for small and large specimens
Foot switch and automatic measurement allow hands-free operation
Built-in statistics with average, standard deviation, coefficient of variance, and min/max
Large storage capacity and data transfer from the hazemeter to a PC for professional documentation
Operation in English, German, French, Spanish and Italian – switchable
Precise and Reliable Readings –Any time
Total Transmittance and Transmission Haze in one unit
Reference beam, self-diagnosis and enclosed optics guarantee accurate readings
Ready for measurement without warm-up time
Automatic and long-term calibration guarantee reliable readings
ASTM D 1003
Measurement conditions are different during calibration and actual measurement.
During calibration, part of the light escapes through the open entrance port of the hazemeter. While taking a measurement, the entrance port is covered with the sample. Thus, the amount of light in the sphere is increased by the light reflected at the sample surface.
ISO 13468
Measurement conditions are kept equal during calibration and measurement due to an additional opening in the sphere.
During calibration the sample is placed at the compensation port. For the actual measurement, the sample is changed to the entrance port. Thus, the so-called sphere efficiency is independent of the reflection properties of the sample.
Note:
Differences between the two methods can be approximately
2 % Total Transmittance on clear, glossy samples
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