An inlet device for a gravity separator for separating a fluid mixture including gas and liquid. In one embodiment, JRNSO is determined in Frequency Division Duplex using a baseband signal loop back and private pilots. An overhead projector is mounted on a bottom of the housing for projecting image to the reflector and a drive device is mounted between the screen and the reflector for expanding the reflector when using the reflector and backward moving the reflector after using the reflector to reduce the volume of the rear-project video assembly. A measurement is obtained of the retroreflected light from the dielectric microsphere as the photonic nanojet scans the inspection area. The reversal actuator has two spring-biased fingers which alternatively engage the pawl to move it into one position or the other.