Sensor device for measuring substance concentration

Abstract

A sensor device for determining the concentration of a substance in an open sample (130) in the presence of an interfering substance, the sensor device comprising: a first light source (200) emitting at a first wavelength absorbed by the substance the pulsed light (S1), the second light source (210), which emits the pulsed light (S2) at the second wavelength through the substance, the optical device (250, 252, 254, 310, 320, 330, 340) , which is used to guide at least a portion of the emitted pulsed light (S1, S2) of said first and second wavelengths along the same optical path through the open sample (130), and a sample detector (230), which is arranged At the end of the optical path for receiving the emitted light of the first and second wavelengths (S1, S2) through the sample (130), wherein the interferents are formed as deposits on exposure to on at least one of the optical devices (250, 252, 254, 310, 320, 330, 340) of the substance, and wherein the first and second wavelengths are absorbed by the interferent.

Description

technical field [0001] The invention relates to sensor devices. More specifically, the invention relates to a sensor device for measuring the concentration of a sterilizing substance in a sterilizing unit of a filling machine. Background technique [0002] Different sensors for determining the amount, presence or concentration of substances are well known and widely used in different industries to monitor or control physical parameters of a specific environment. [0003] Because different applications require the use of specially designed sensors, there are a large number of different sensing technologies commercially available. [0004] One such sensing technique involves the use of light, where the sensor measures the amount of absorption and / or transmission by a sample disposed in the optical path of the emitted light. Thus, such sensor devices generally comprise a light source arranged on a first side of the sample, a detector arranged on the opposite side of the sampl...

AI Technical Summary

Problems solved by technology

However, in a gaseous environment, such as in the aseptic area of ​​a liquid food filling machine, deposits on optical components contribute to increased noise of the measurement, thus reducing the quality of the measurement

[0010] While the above sensor devices offer some advantages, the complete structure of such sensor devices is not suitable for specific applications where disturbing substances tend to form deposits in the optical path

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