Patent
Optical fluid sensor
Eric D. Park
- 13 Apr 1988
1
About: The article was published on 13 Apr 1988.
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Citations
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References
Patent
Electro-optical liquid level sensor
Robert C. Harding
- 19 Dec 1980
TL;DR: In this article, a low liquid level electro-optical probe is made self-checking by providing the same with means for intercepting a portion of the usual light beam and constantly reflecting such portion to the usual receiving EO transducer to generate a low level electrical signal even when the probe is wet.
82
Patent
Spectrochemical analyzer using surface-bound color reagents
Edgar Lawrence Eckfeldt
- 26 Sep 1975
TL;DR: In this article, a spectrochemical analyzer utilizing a transparent medium such as quartz which has a color reagent coating the surface is described. And the magnitude of internal surface reflection varies with the change in absorptivity resulting from a color change in the reagent in response to a change in chemical condition of the sample.
52
Patent
Liquid level indicator
Joseph Spiteri
- 07 Oct 1977
TL;DR: In this paper, a liquid level monitor using the difference between the refraction of light by a prism in contact with air and by the same prism being monitored with liquid was used to give warning of low liquid level.
37
Patent
Sensor for the measurement of the refractive index of a fluid and/or phase boundary between two fluids by means of visible or invisible light
Pieter Marcus Houpt,Wielandt Ralph Tadema +1 more
- 12 Mar 1986
TL;DR: In this paper, a light guide in the form of a rod is used for the measurement of the refractive index of a fluid and/or phase boundary between two fluids, where one end is connected to both a light source and a detection element and the other end of the rod is reflective.
33
Patent
Electro-optical apparatus for the detection of the presence of liquid
Benno Perren
- 31 Jul 1978
TL;DR: An electro-optical apparatus for the detection of the presence of liquid, comprising at least one monochromatic infrared transmitter arranged at the region of a hollow body probe composed of synthetic, high molecular material and totally reflecting the infrared radiation is described in this article.
11