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Sensor for detecting gas and method for detecting gas

A sensor and detector technology, applied in the direction of sensors, instruments, applications, etc., can solve problems affecting single-mode propagation, affecting system performance, and difficult to maintain sensor reliability

Active Publication Date: 2019-12-17
SENTECH AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The sensor system is expensive, complex and difficult to manufacture
Small deviations from manufacturing specifications can greatly affect single-mode propagation and thus system performance, so tolerances must be very tight
Difficult to maintain sensor reliability during actual use and risk of early failure

Method used

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  • Sensor for detecting gas and method for detecting gas
  • Sensor for detecting gas and method for detecting gas
  • Sensor for detecting gas and method for detecting gas

Examples

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Embodiment Construction

[0241] figure 1 A schematic cross-sectional view of a sensor 1 for detecting gases is shown. The sensor 1 comprises a contact surface 2 which can be directed towards the measurement site. In this case, the measurement site is an area on the patient's skin, and the gas to be detected is CO diffused through the patient's skin (i.e., percutaneously) 2 . The sensor also comprises a radiation source 3 located in the compartment 13, which emits radiation at least in the wavelength range that is absorbable by the gas to be measured. The emitted radiation of the appropriate wavelength propagates along multiple paths 6 from the source 3 through a channel 8 comprising at least one sealing element 14 to the measurement volume 4, and from there through another channel 8 (also comprising the sealing element 14) and through wavelength filtering The detector 21 propagates to the first detector 5 , which is located in the compartment 13 . Depending on the concentration of the gas in the m...

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Abstract

A sensor (1) for detecting gases, in particular CO2, comprising a contact surface (2) which can be directed towards a measurement site. The sensor (1) comprises at least one radiation source (3), a measurement volume (4) for receiving the gas to be measured, and at least a first detector (5) for detecting (4) Radiation transmitted to the first detector (5). The sensor comprises a path (6) of radiation between a radiation source (3) and a first detector (5), wherein the radiation propagates along the path in a non-imaging manner.

Description

technical field [0001] The present invention relates to a sensor for detecting a gas and a method for detecting the presence or amount of a gas. Background technique [0002] Current systems for measuring gases employ a wide variety of measurement principles. In medical technology, electrochemical sensors are mainly used to measure gases that have diffused percutaneously, ie through the skin of a human patient or an animal. Currently used to measure transcutaneous CO 2 The sensor is highly sensitive and shows a good response time. However, those sensors drift over long measurement periods and require frequent calibration, thus requiring the user to use a rather bulky calibration instrument including a supply of calibration gas at the point of use. Sensor calibration and maintenance reduce the usability of this technology. Such an electrochemical sensor for measuring transcutaneous gases is known, for example, from WO 2008 / 132205. [0003] Today, transcutaneous blood gas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/1455A61B5/145G01N33/49G01N21/31
CPCA61B5/14542G01N33/4925G01N21/3504G01N21/03G01N33/497A61B5/14552G01N2201/068
Inventor D·鲁德曼恩P·M·舒马赫J·朗S·卡吕埃尔C·埃伦贝格尔-吉拉德R·斯坦利R·埃克特M·托尔曼B·蒂莫提杰维科
Owner SENTECH AG