The MicroFoss™ concept is based on traditional microbiology is well understood and accepted, employing microorganism growth in liquid media instead of in solid media.
Microorganisms change when they grow because of the metabolic activity, the pH and red ox potential of the media, which changes the spectral pattern.
MicroFoss uses ready-to-use vials, specific to each analyte. They contain an agar barrier layer separated from the liquid broth. The barrier layer mirrors the colour in the broth without letting sample particles influence the measurement. Light from the Light Emitting Diode (LED), passes through the agar and colour changes due to micro-organism growth are detected. Every 6 minutes a light signal sent the optical changes in the agar by photometrical detection for registration on a computer (figure 1).
The detection time is the time when the difference in optical units exceeds a defined threshold value (at this time the number of micro-organisms is about 100,000 - 1000,000/ml) and is inversely related to the number of organisms in the sample.
Based upon user defined acceptable levels of bacteria, a specified time (cut-off time) correlating with the specified level is set. When the detection time is shorter than the cut-off time, it is indicated that the bacteria level of the sample is above the specified acceptable level and the computer will automatically alert the user, allowing for immediate corrective action to be taken.
For further product information please go to Products direct to select products by name, or go to the Product guide to search for a solution based on a combination of sample type and parameters.
