Patent ID: 7808620

Claim:
A testing device, comprising: a microchip having a receiver for test fluid; a light source having a discharge lamp which emits light into the test fluid receiver, the light source having a housing in which the discharge lamp is located; a light receiving unit which receives the light transmitted through the test fluid receiver, and an arithmetic calculation mechanism which calculates a concentration of a component of the test fluid to be detected based on the intensity of light emitted from the test fluid receiver after having passed through the test fluid therein and received by the light receiver, wherein the discharge lamp has a rated power of 20 W to 150 W, and wherein the light source housing is formed of an electrical insulating material and is equipped on an outer surface thereof with a shielding mechanism connected to the ground comprised of a thin metal film having a thickness of 0.1 μm to 100 μm, the shielding mechanism shielding the arithmetic calculation mechanism located outside of the housing from electromagnetic waves emitted from the light source.