Acronym: AC-9
Description:

"The ac-9 simultaneously determines the spectral transmittance and spectral absorption of water over nine wavelengths. The unit offers compact size, high precision, and excellent stability in providing a method for determining the absorption (a(l)) and beam attenuation (c(l)) coefficients. The ac-9 employs a 25-cm pathlength for effective measurement of the cleanest natural waters. The unit is also available in a 10-cm pathlength configuration" (http://www.hydronav.com/images/Oceanographic/pdf/ac9ssd.pdf).

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Datasets associated with AC 9