Memory and nonvolatile properties of the E-Cell makes it suitable for monitoring a variety of functions of a moving vehicle. Properly programmed, an E-Cell can control engine maintenance periods. It is less than 1/10 in3 in size and weighs less than 1/10 oz. This small size facilitates the packaging of a sizable monitoring system in a practical volumetric space.The E-Cell, by virtue of its construction, shows no visible signs relating to the amount of information contained in the unit. In addition, the scaling factors used in the supporting circuitry makes the E-Cell compatible with any monitoring program where strict security is required.