An apparatus for inspection of fluids having a fluid analysis cell with a cavity therein enclosed by two light transmitting windows and having a spacer member fixedly positioned therebetween which provides a fluid analysis chamber of fixed pathlength where fluid flows by the windows and preferably wherein the flow laminar and at a uniform shear to provide accurate color measurements. In one embodiment, the clutch booster includes a booster member coupled with the clutch for engaging or disengaging the clutch from the engine of the vehicle in response to a force applied to the clutch of the vehicle and means for determining the status of the clutch of the automobile. The arming parameter of the novel device is an apogee parameter, effected by the projectile flying through the apogee of its projectile trajectory. Further, a portion of the second ferromagnetic free layer overlaps a portion of the first ferromagnetic free layer proximal to an air bearing surface to form a v-shape. Uses of such data are also disclosed.