In-Line Optical Hydrogen Peroxide Sensing Using UV Absorbance

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Solution Overview

Problem

Existing methods for measuring hydrogen peroxide concentrations in aqueous solutions, such as test strips, amperometric sensors, and fluorescent optics, are prone to user error, maintenance requirements, or sensitivity issues, necessitating a sensor that provides real-time monitoring without frequent maintenance or calibration.

Innovation Solution

A hydrogen peroxide sensor utilizing ultraviolet and visible light sensors to determine absorbance and turbidity levels in a conduit, enabling real-time concentration monitoring through absorbance readings.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If amperometric sensors are used to detect hydrogen peroxide concentrations, then real-time monitoring and sensitivity are improved, but device complexity and maintenance requirements increase

Engineering Contradiction:

Improvehydrogen peroxide concentration detection sensitivityVSAvoidsensor structure complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent replaces the amperometric electrochemical sensing mechanism with an optical sensing mechanism. Instead of using electrodes and electrical current measurement, the system uses light absorption properties of hydrogen peroxide to detect concentration, thereby eliminating the complex electrode structure and reducing maintenance requirements while maintaining real-time monitoring capability

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the detection parameter from electrical current (amperometric) to optical absorption (spectrophotometric). By measuring the absorption of light at specific wavelengths by hydrogen peroxide molecules, the system achieves concentration detection without the mechanical and chemical complexity of replaceable membranes and calibration requirements inherent in amperometric sensors

Inventive Principle:

Principle #35Parameter changes

2Ease of operation

If test strips are used to measure hydrogen peroxide concentration, then ease of operation is improved, but measurement precision and reliability deteriorate due to user error and disposability

Engineering Contradiction:

Improveuser operation simplicityVSAvoidconcentration measurement accuracy

Core Design Contradiction:

Ease of operationVSMeasurement precision

Solution Approach 1:

The patent implements an automated optical sensing system that performs measurements without requiring user intervention. The system automatically illuminates the sample, detects light absorption, processes signals, and displays results, eliminating the manual color comparison process of test strips while maintaining ease of use through automated operation

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent replaces the manual visual comparison mechanism of test strips with an automated optical detection system. Instead of requiring users to compare color changes against reference strips, the system uses photodetectors to objectively measure light absorption, thereby eliminating user error while maintaining operational simplicity

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Extent of automation

If fluorescent optics are used to detect hydrogen peroxide, then automated measurement capability is improved, but reliability deteriorates due to sensitivity to pressure and temperature changes

Engineering Contradiction:

Improveautomated measurement capabilityVSAvoidsensor stability under pressure and temperature

Core Design Contradiction:

Extent of automationVSReliability

Solution Approach 1:

The patent changes the detection method from fluorescent emission (which is sensitive to environmental conditions) to light absorption spectroscopy. By measuring the absorption of light at specific wavelengths by hydrogen peroxide, the system achieves automated measurement with improved reliability, as absorption measurements are less susceptible to pressure and temperature variations compared to fluorescent emissions

Inventive Principle:

Principle #35Parameter changes

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Enables accurate, real-time hydrogen peroxide concentration monitoring without user intervention or frequent maintenance, suitable for various water treatment applications.

Implementation Method 1

an ultraviolet light sensor configured to determine an ultraviolet light absorbance level of the water in the conduit. The ultraviolet light absorbance level is used to determine the concentration of hydrogen peroxide

Methodology Applied

Scientific EffectAbsorbance: Absorption (EM radiation)

Implementation Method 2

a visible light sensor configured to determine a turbidity level of the water in the conduit. The turbidity level also is used to determine the concentration of hydrogen peroxide

Methodology Applied

Scientific EffectTurbidity: Scattering

Data Source

PatentUS20260063550A1System and method for in-line optical sensing of hydrogen peroxide

Publication Date: 2026.03.05 CARDIOQUIP LLC

AI summary

A water monitoring system comprising a hydrogen peroxide sensor configured to determine a concentration of hydrogen peroxide in water in a conduit. The hydrogen peroxide sensor further comprises an ultraviolet light sensor configured to determine an ultraviolet light absorbance level of the water in the conduit. The ultraviolet light absorbance level is used to determine the concentration of hydrogen peroxide. The hydrogen peroxide sensor may further comprise a visible light sensor configured to determine a turbidity level of the water in the conduit. The turbidity level also is used to determine the concentration of hydrogen peroxide.