Patent ID: 6034762
Filing Date: 2000-03-07
Classification: G01N

Abstract:
A refractometric apparatus for use with a hydraulic fluid, comprising:means for defining an optical path;an array of photosensitive elements located along the optical path, the array being electrically coupled to a character display;a prism located along the optical path in spaced relation to the array of photosensitive elements, the prism having a face disposed toward a sample of the hydraulic fluid, the prism being located to receive light for illuminating the sample of the hydraulic fluid, whereby a transition between light and darkness is a function of a water content in the hydraulic fluid;a reflecting element located along the optical path between the prism and the array of photosensitive elements; anda temperature sensitive means operatively engaging the reflecting element for pivotal motion of the reflecting element in response to temperature changes so as to compensate for temperature changes by altering the optical path in response to such changes;whereby the character display provides a reading relating to the water content of the hydraulic fluid.