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An infrared detector senses light in the infrared range, invisible to the human eye, and is used for gas and movement...
A visible-light spectrophotometer measures absorbed, transmitted or reflected light as a function of wavelength in th...
A sound-level meter measures acoustic intensity, indicated in decibels. Class 1 and Class 2 devices offer different d...
The digital refractometer measures sample concentration with more precision and repeatability than the traditional op...
