Transmission type photoelectric sensor

Abstract

The invention provides a transmission type photoelectric sensor. The sensor comprises a mounting flange, first gland nuts, second gland nuts, a first transparent tube, a second transparent tube, light generating devices, light receiving devices, a first locating rod and a second locating rod, wherein the first transparent tube extends into a first seal cavity and is fixedly connected with the first gland nuts in a sealing manner; the second transparent tube extends into a second seal cavity and is fixedly connected with the second gland nuts in a sealing manner; the first locating rod is arranged in the cavity of the first transparent tube; the second locating rod is arranged in the cavity of the second transparent tube; the light generating devices are fixedly connected with the first locating rod; the light receiving devices are fixedly connected with the second locating rod; and the light generating devices horizontally correspond to the corresponding light receiving devices. The sensor is used for detecting the liquid level or smoke concentration, has a simple structure and is convenient to use.

Description

technical field [0001] The invention relates to a transmissive photoelectric sensor, in particular to a transmissive photoelectric sensor for measuring the liquid level of water and oil liquid or the concentration of smoke in gas. Background technique [0002] At present, in the liquid level measurement of water, oil and corrosive liquids, as well as the detection of smoke concentration in gas, etc., the visual method is generally used. This method wastes manpower and is not very accurate. In some special occasions (such as the environment of toxic liquids and gases, the concentration of liquids and smoke in airtight non-transparent containers, etc.), it is inconvenient to use manual reading methods, and some measured liquids and gases are corrosive, flammable and explosive. The liquid level gauge is in contact with liquid and gas for a long time, which will cause measurement errors due to corrosion, which will greatly reduce its service life or even fail. Although some sens...

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Problems solved by technology

[0002] At present, in the liquid level measurement of water, oil and corrosive liquids, as well as the detection of smoke concentration in gas, etc., the visual method is generally used. This method wastes manpower and is not very accurate. In some special occasions (such as the environment of toxic liquids and gases, the concentration of liquids and smoke in airtight non-transparent containers, etc.), it is inconvenient to use manual reading methods, and some measured liquids and gases are corrosive, flammable and explosive. The liquid level gauge is in contact with liquid and gas for a long time, which will cause measurement error due to corrosion, which will greatly reduce its service life or even fail. Although some sensors have powerful functions, they are prohibitive because of their complex structure and high price.

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