A device and method for performing a preliminary test on a neat serum sample contained in a primary collection tube is provided herein. The solar cell assembly may include a solar cell and an interconnection member, the interconnection member comprising a first portion and a second portion attached to the first portion with an angle formed therebetween. The apparatus includes a pair of hanger assemblies which are pivotally secured to the saddle member and which extend downwardly therefrom for supporting a pair of footrests thereon. The bilayers are useful for transporting the channels into cells or other bilayers. Additionally, the invention may include a housing, a strain relief collar and a strain relief boot. Fuel type is delivered to engine cylinders in response to operating conditions.