| abstract |
This device discloses a portable sequential contaminant detection system which can test samples for contaminants at predetermined timed intervals. The detection system has a motor to advance a matrix, a motor to raise and lower syringes holding liquefied samples of air to be tested, and a motor to raise and lower plungers within the syringes to draw up fluids or expel fluids into reservoir wells of the matrix to test air or other samples for contaminants. The system relies upon a "matrix" which will hold reagents with which the air samples will be mixed. The matrix is stepped to move into precise registration with the "read" module where the relative reflectance of each capture membrane reads statically by a fixed LED, silicon photodiode and amplifier associated with each channel. |