Abstract: A method for testing for presence of a microbe in a sample includes measuring an instantaneous transmission rate of two or more wavelengths through the sample (1403), providing predetermined transmission rates corresponding to positive or negative samples for the presence of the microbe for each of the two or more wavelengths, and determining a probability of the presence of the microbe based on the instantaneous transmission rate for each of the two or more wavelengths through the sample by comparing the instantaneous transmission rate to the predetermined transmission rates (1404).

Abstract: A method for producing a pelletized material includes mixing a media powder with a treated water, the treated water comprising an additive for substantially preventing bacterial contamination, pouring a mixture of the media powder and the treated water on a non-binding surface, spreading the mixture into a wafer, drying the wafer, and grinding the wafer to produce the pelletized material.

Abstract: A method for producing a pelletized material includes mixing a media powder with a treated water, the treated water comprising a additive for substantially preventing bacterial contamination, pouring a mixture of the media powder and halogenated water on a non-binding surface, spreading the mixture into a wafer, drying the mixture, and grinding the mixture to produce the pelletized material.

Abstract: A light collar includes an outside diameter, a first inside diameter, a second inside diameter greater than the first inside diameter forming a bore for receiving an ampoule well, and at least one port in an outer surface of the collar having a depth for receiving a light source.

Abstract: A method for producing a palletized material includes mixing a media powder with a treated water (100), the treated water comprising an additive for substantially preventing bacterial contamination, pouring the mixture of media powder and halogenated water on a non-binding surface (102), spreading the mixture into a wafer (103), Drying the mixture (104), and grinding the mixture to produce the palletized material.

Abstract: A liquid testing system includes a first well for receiving a sample to be tested, a first light, having a first wavelength, for illuminating the first well, and a second light, having a second wavelength, for illuminating the first well. The liquid testing system further includes a light control, coupled to the first light and the second light, for selecting one of the first light or the second light to illuminate the first well, a light detector receiving light passing into the first well, and a processor, coupled to the light control and the light detector, for determining a light characteristic of the sample over time.