Abstract: A rotary actuator includes a motor operatively joined to a gear train having an output shaft. An optical encoder is operatively joined to the shaft of the motor for detecting rotation thereof. A controller is operatively joined to the encoder, and is configured for operating the motor to drive the output shaft between minimum and maximum rotary positions as detected by the encoder.

Abstract: A rotary actuator includes a motor operatively joined to a gear train having an output shaft. An optical encoder is operatively joined to the shaft of the motor for detecting rotation thereof. A controller is operatively joined to the encoder, and is configured for operating the motor to drive the output shaft between minimum and maximum rotary positions as detected by the encoder.

Abstract: A system and method for homogeneous bioassay uses acoustic energy emissions. A measurement cell is designed for binding reactions of mobile biorecognition molecules. The binding reaction contained in the measurement cell is for example a ligand/receptor binding reaction or a complementary nucleic acid binding reaction. A passive acoustic energy transducer is coupled to the measurement cell for detecting acoustic energy generated by the binding reaction of mobile biorecognition molecules. The passive acoustic energy transducer generates a corresponding analog electrical signal. A signal conditioner coupled to the passive acoustic energy transducer filters and amplifies the electrical signal. A signal analyzer determines spectra of the conditioned electrical signal corresponding to characteristic acoustic energy emissions of the binding reaction of mobile biorecognition molecules.