Patent ID: 8077315
Filing Date: 2011-12-13
Classification: G01N

Abstract:
1. An apparatus for measuring the transmittance of a liquid sample to radiation, comprising: a lamp for emitting light; a light detector for detecting an intensity of light emitted by said lamp; a sample cell for holding a test liquid having at least two sets of opposed side walls where each set of opposed side walls defines a different cell width and is able to transmit the light emitted by the lamp; a lamp and light detector fixture incorporating said lamp and said light detector wherein said lamp is fixed relative to said light detector and spaced such that a light path between said lamp and said light detector is defined; a rotation mechanism to provide relative rotation between said sample cell and said lamp and light detector fixture such that the light path passes through at least two sets of said opposed side walls at different times; a microprocessor connected to said light detector, said microprocessor including processing means for processing light intensity signals received from said light detector, said microprocessor including processing means configured for