| 摘要 |
<p>The instrument comprises a sensor (2) with a pair of spaced electrodes (4, 6), designed to be immersed in the fluid to form a capacitive measuring element and furnish a signal representative of the fluid's dielectric constant, the signal being processed to give an indication of the fluid's quality or degree of degradation. The electrodes extend in the same plane, with the fluid bathing both their faces on either side of the plane, and the signal from them is compared with a standard from electrodes (4ref, 6ref) of a reference capacitive component. The electrodes in both pairs are made from food grade steel, are comb-shaped, with interlocking parallel teeth, and are surrounded by a metal frame that acts as a screen against electromagnetic disturbance.</p> |
