Gas Detection in Basement Car Park

As an important part of the urban transport system, basement car parks provide convenient parking for vehicles. However, due to the enclosed environment, vehicle emissions and the operation of mechanical equipment, underground car parks may have a potential risk of gas leakage, posing a threat to the health of personnel and the safety of vehicles. The main function of a gas detector is to monitor the gas concentration in real time and issue an alarm when the concentration exceeds the safe range so that appropriate measures can be taken to ensure the safety of personnel and vehicles. Installing fixed Carbon Monoxide (CO) gas detectors, Nitrogen Dioxide (NO2) gas detectors and multi-gas detectors from in basement car parks is an important measure that effectively reduces the risk of accidents caused by gas leakage.

Which Gases Should Be Measured?

Basement car parks are exposed to a wide range of potential gas leakage risks, including Carbon Monoxide (CO), Nitrogen Oxides (NOx), and Volatile Organic Compounds (VOCs). These gases, when not detected and controlled in time, may cause serious safety accidents, such as explosions and poisoning, threatening the lives of vehicles and people in the car parks.

Gas detection in basement car park

Carbon Monoxide (CO) is one of the most common harmful gases in underground car parks. It is produced by engine emissions and incomplete combustion of mechanical equipment. Carbon Monoxide is colorless, tasteless and odorless, and it is difficult for people to detect its presence.

Nitrogen oxides(NOX) are mainly Nitrogen Dioxide (NO2) and Nitric Oxide (NO). Nitrogen Oxides in basement car parks mainly come from vehicle exhaust emissions and the combustion process of internal combustion engines.

VOCs mainly come from vehicle exhaust, fuel oil evaporation, mechanical equipment, construction materials, etc. VOCs are an important component of air pollution and have an impact on air quality and the environment.

If there is a natural gas pipeline near the underground car park, there may be Methane leakage. Meanwhile, the combustion process of internal combustion engines also produces Methane, especially vehicles using natural gas as fuel will emit more Methane.

The enclosed car park environment may result in reduced Oxygen concentration, which may affect breathing. Low Oxygen concentration may lead to discomfort such as dizziness and shortness of breath.

Gas Monitoring Equipment for Underground Car Park

Fixed Single Gas Monitors

  1. Carbon Monoxide Gas Detectors: Carbon Monoxide is a combustion product of petrol and diesel engines, therefore in enclosed car parks and garages, Carbon Monoxide measurement is the international standard and fixed Carbon Monoxide gas detectors can be used to monitor its concentration.

  2. Nitrogen Dioxide Gas Detectors: Vehicle exhaust and mechanical equipment in underground car parks can lead to elevated concentrations of Nitrogen Dioxide, posing a potential threat to the health of personnel. By installing fixed Nitrogen Dioxide gas detectors, the concentration of Nitrogen Dioxide in basement car parks can be monitored and controlled to ensure that air quality meets safety standards.

  3. VOC Gas Detectors: Vehicle exhaust, paints and other materials may release VOC, posing a threat to air quality and human health. The VOC gas detector monitors the concentration of these compounds and ensures that the indoor air quality meets the standards.

  4. Methane Gas Detectors: Basement car parks can be at risk of Methane leaks, especially if there is a natural gas pipeline nearby. The use of a fixed Methane gas detector allows early detection of possible fire or explosion hazards.

  5. Oxygen Gas Detectors: The closed environment of underground car parks can lead to reduced Oxygen levels, which can affect breathing. Oxygen gas detectors can monitor Oxygen levels to ensure that airborne Oxygen levels are within safe limits.

Multi Gas Detectors

Multi Gas Analyzer (4 Gas)

It can continuously monitor the presence of the following four gases in the air at the same time:

  1. Nitrogen Dioxide (NO2)
  2. Hydrogen Sulfide (H2S)
  3. Carbon Monoxide (CO)
  4. Ozone (O3)

Multi Gas Detector (5 Gas)

Different from 4 gas-multi-analyzer, it mainly monitors the following 5 gases:

  1. Carbon Monoxide (CO)
  2. Hydrogen Sulfide (H2S)
  3. Oxygen (O2)
  4. LEL
  5. Volatile Organic Compounds (VOC)

Gas detectors in basement car parks are important safety equipment that provides continuous monitoring of potentially dangerous gases. Once an increase in gas concentration is detected, an alarm is triggered to alert staff. In order to minimize health risks, it is essential to use gas detection to monitor for dangerous gases in underground car parks, even if ventilation is available. offers a number of inexpensive, reliable single gas detectors and protable multi-gas detectors for basement car parks.

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