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How much do you know about the principle of ammonia detection instruments?
Date: 2025-12-04Read: 11
Ammonia detection instrument is a device used to detect the concentration of ammonia in the air or other environments. Ammonia (NH3) is a colorless gas with a pungent odor, widely used in chemical, agricultural, industrial, and environmental monitoring fields. Due to the potential harm of ammonia to human health and the environment, monitoring and detection of ammonia has become an important task in industrial production, safety management, and environmental protection.
Ammonia gas detection instrumentWorking principle:
1. Electrochemical principle
Electrochemical ammonia gas sensors generate current signals by reacting ammonia gas with electrolytes. When gas molecules react with electrodes on the sensor surface, a current proportional to the gas concentration is generated. After amplification, this current signal is converted into an ammonia concentration value. This method is suitable for real-time monitoring of low concentration ammonia gas, with fast response time and sensitive sensors.
2. Principles of Spectral Analysis
Analyze the absorption spectrum of ammonia molecules at specific wavelengths by irradiating the sample gas with laser, infrared or ultraviolet light. Ammonia molecules have clear absorption peaks at specific wavelengths, and the device calculates the concentration of ammonia by measuring the light intensity absorbed by the gas. This method has high accuracy and can be used in high concentration environments.
3. Catalytic combustion principle
This principle generates heat through the reaction between ammonia and a catalyst, and calculates the concentration of ammonia through the change in heat. The catalytic combustion method is suitable for detecting high concentrations of ammonia and is typically used for real-time monitoring of gas concentration in industrial environments.
Application areas of ammonia detection instruments:
1. Industrial production
In industries such as chemical, pharmaceutical, and steel smelting, ammonia is often used as a raw material or byproduct. Detecting the concentration of ammonia can effectively prevent gas leaks and ensure production safety. Especially in environments where ammonia leakage can easily cause serious accidents such as fires and explosions, real-time monitoring of ammonia concentration is crucial.
2. In the field of agriculture
In agriculture, ammonia is used as a fertilizer (such as ammonia water) and a part of animal feed, and its use and emissions have a certain impact on the environment and human health. Ammonia detection in agriculture is mainly used to monitor the use of fertilizers and their environmental emissions in agricultural production, in order to control the pollution of ammonia to the environment.
3. Environmental monitoring
Ammonia, as a pollutant gas, can affect air quality when emitted into the air, and in severe cases, may have negative impacts on ecosystems. The environmental monitoring department often uses detection instruments to monitor the concentration of ammonia in the atmosphere, helping to evaluate and improve air quality.
4. Public safety
In high-risk areas of ammonia gas leakage, such as fertilizer plants, cold storage, and other hazardous gas treatment facilities, it is an important tool to ensure workplace safety. They can help detect ammonia leaks early and prevent accidents caused by ammonia poisoning or fires.