Abstract The standard instrument for measuring malt, wort, and beer color is the spectrophotometer. Spectrophotometers are not rugged; they have critically aligned collimators, monochromators, lenses, slits, and mirrors that make them difficult to use and maintain in a production environment. Our research shows that wort and beer color can be measured accurately with rugged equipment based on light emitting diodes (LEDs) with results in agreement with those of a spectrophotometer. Two or more colored diodes were used. LED-based apparatus does not require critical alignment, is not highly sensitive to environmental conditions such as temperature, moisture, dust, and vibration, and can be rapid, inexpensive, compact, rugged, and easy to use. Statistical comparison in the range of 1–9 °SRM shows an insignificant bias for (SRM–LED) of −0.06 ± 0.4 °SRM. The intraclass correlation coefficient for the differences was 0.9952.

中文翻译：

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啤酒、麦芽汁和麦芽的坚固颜色测量

摘要 测量麦芽、麦芽汁和啤酒颜色的标准仪器是分光光度计。分光光度计并不坚固；它们具有严格对齐的准直器、单色器、透镜、狭缝和反射镜，这使得它们难以在生产环境中使用和维护。我们的研究表明，可以使用基于发光二极管 (LED) 的坚固设备准确测量麦芽汁和啤酒的颜色，其结果与分光光度计的结果一致。使用了两个或多个彩色二极管。基于 LED 的设备不需要严格的对准，对温度、湿度、灰尘和振动等环境条件不太敏感，并且可以快速、廉价、紧凑、坚固且易于使用。1–9 °SRM 范围内的统计比较显示（SRM-LED）-0.06 ± 0.4 °SRM 的偏差微不足道。