Spinning the Test Unit at high speed efficiently expels fluid into the integral sump chamber. The tube design allows for multiple discrete washes within seconds, ensuring excellent separation of unbound material for highly sensitive assays. Following incubation, the Test Unit is spun at high speed about its vertical axis. Reaction fluid is forced up and completely captured in the sump chamber. A series of washes efficiently removes unbound material from the bead and inner tube.
Light emission is read with a high sensitivity photon counter.
Automatic light signal attenuation effectively broadens the range of luminometer readings 100-fold. The sustained signal produced by the enzyme-enhanced chemistry allows multiple readings to be taken for more precise measurements.