| 摘要 |
<p>PURPOSE: To constitute a small-sized light-weight measuring cell easily at low cost by applying metal plating to a laminated of copper foil and assembling a cell body with the plated surface directing inward. CONSTITUTION: A plastic plate of 1-3mm thick is laminated, preferably, with 30-70μm thick of copper foil thus forming copper foil laminate pieces 2, 3 for upper and side faces having lustered rear surface subjected to plating M of noncorrosive metal, e.g. gold. A protrusion 31 of the laminate piece 3 is fitted in the notch of the laminate piece 2 and assembled into U-shaped by soldering. Similarly, a light source part 5 and a detection part 6 subjected to gold plating M are built in the inner side face of copper foil laminate pieces 51, 61. A protrusion 31 of the laminate piece 3 is inserted into the insertion hole 41 of a printed board 4 subjected to gold plating M and secured by soldering thus completing a measuring cell. A power supply circuit, a display circuit, an output circuit, etc., and various elements are previously built in the board 4 and when the measuring cell is additionally built in, a nondispersive infrared densitometer can be constituted easily.</p> |
