Patent ID: 8689614

Claim:
An apparatus for use in monitoring a change in a density and/or a viscosity of a test sample, comprising: a multi-beam resonator, the multi-beam resonator comprising: a base substrate comprising a mounting zone defined thereon having a defined longitudinal length; at least two resonant beam members, wherein each of the resonant beam members has a respective longitudinal length, wherein a ratio of the longitudinal length of each resonant beam member to the defined longitudinal length of the mounting zone of the base substrate is in a range of 1 to 9; at least one vibratory element positioned to cause a vibration of at least one of the resonant beam members; at least one sensor means for monitoring at least one parameter associated with the vibration of the resonant beam member; and a reaction chamber for receiving and retaining a test sample, the reaction chamber comprising at least one inlet port to allow an introduction of the test sample; and a reagent comprising amebocyte lysate or a synthetic analogue thereof for adding to the test sample to form a test sample mixture within the reaction chamber.