Industrial carbon monoxide sensor


Carbon monoxide is a colorless, odorless, non-irritating toxic gas that is widely present in processes such as industrial production, combustion emissions and chemical reactions. In industrial environments, the risk of carbon monoxide leakage cannot be ignored for various reasons. In order to ensure the safety of the workplace, Industrial carbon monoxide sensor has become one of the key equipment necessary in the industrial environment.

Industrial carbon monoxide sensor definition

Industrial carbon monoxide sensor is a gas sensor specially used to detect the concentration of carbon monoxide gas in the environment and belongs to the category of electrochemical gas sensor. It senses carbon monoxide molecules in the air and reacts chemically or physically with them, converting their concentration information into readable electrical signals, thereby monitoring carbon monoxide levels in real time and ensuring environmental safety.

Industrial carbon monoxide sensor working principle

1. Basic structure

The carbon monoxide sensor mainly consists of two parts: the sensor element and the control unit.

Sensor element This is the core component of the sensor, which uses different types of sensitive materials, such as metal oxide semiconductors, constant potential electrolytes or other chemically sensitive materials. Among them, metal oxide semiconductor sensors are the most common. These materials undergo chemical reactions or physical adsorption when exposed to carbon monoxide, causing the material's conductivity to change.

Control unit The control unit is responsible for receiving the electrical signal generated by the sensor element, amplifying, processing and analyzing it, and determining whether to issue an alarm based on the preset threshold. The control unit can accurately quantify the current changes in the sensor element due to changes in carbon monoxide concentration, and then calculate the actual concentration of carbon monoxide.

2. Detailed explanation of working mechanism

(1) Semiconductor principles

Semiconductor carbon monoxide sensors rely on the material's property that its resistivity changes with carbon monoxide concentration. Specifically, when carbon monoxide gas diffuses into the interior of the sensor and comes into contact with a semiconductor material (such as an N-type semiconductor), the carbon monoxide molecules will undergo a redox reaction with oxygen ions adsorbed on the surface of the material, releasing electrons. These extra electrons make the semiconductor more conductive, meaning its resistance decreases. Therefore, there is a direct proportional relationship between the sensor's resistance change and the carbon monoxide concentration.

(2) Principle of constant potential electrolysis

Another common type of carbon monoxide sensor utilizes potentiostatic electrolysis technology. In this sensor, carbon monoxide is oxidized on specific electrodes, forming a current that is directly related to the concentration of carbon monoxide. When carbon monoxide gas diffuses into the electrolytic cell inside the sensor, it will trigger an oxidation reaction on the electrode surface, and the generated current signal is captured by the acquisition circuit and converted into corresponding concentration data.

3. Output and alarm response

Whether it is a carbon monoxide sensor based on semiconductor or electrolysis principles, it will generate a corresponding electrical signal after receiving carbon monoxide. As the concentration of carbon monoxide increases, the output current of the sensor will also increase accordingly, and the two maintain a proportional relationship. The control unit will monitor this change. Once the safety threshold is exceeded, the alarm system will be triggered to issue a timely warning to the user to prevent potential poisoning risks.



Industrial carbon monoxide sensor has important safety protection functions in industrial environments. During industrial production, carbon monoxide leakage may cause serious accidents such as explosions and poisoning, posing a great threat to the safety of workers' lives and property. By installing an Industrial carbon monoxide sensor, the carbon monoxide concentration can be monitored in real time. Once it exceeds the safety threshold, the sensor will quickly alarm, allowing staff to take timely countermeasures to avoid accidents.

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