Airless gas detection in underground garages is essential!

At the same time, there are a lot of car exhausts in the garage. The gases emitted from the car exhausts are mainly carbon monoxide, sulphur dioxide, nitrogen oxides, soot particles, formaldehyde and lead from the use of leaded petrol, which are harmful to the human central nervous system and cardiovascular system.

The production of carbon monoxide in underground garages mainly originates from car engines, when the engine is idling, due to insufficient combustion of petrol, it will produce exhaust gas containing a large amount of CO. The underground car park is an enclosed environment, where vehicles enter and exit more frequently, and the exhaust gases are not easily discharged, making it easy to accumulate a large amount of CO gas, resulting in a choking smell in the car park and damaging human health. If the concentration of the gas is too high, it may even cause fire and explosion.

In recent years, national and local authorities have also paid attention to underground garage CO detection systems.

The national standard "Green Building Evaluation Standard" GB/T50378-2014 version stipulates that "underground garages are equipped with CO monitoring devices linked to exhaust equipment".

Industrial Enterprise Design Health Standard GBZ1-2002 stipulates that the maximum permissible CO concentration in the workshop is 30mg/m3, when the operating time does not exceed 30min at a time, the permissible CO concentration can be relaxed to 100mg/m3, when the operating time is 10~20 minutes, the maximum permissible concentration is 200mg/m3.

CO detection

Purpose of installing an online gas monitoring system.

1) Personal safety: real-time monitoring of the ambient air and regular exhaust air to ensure that the concentration of carbon monoxide in the garage is below the hazard level.

2) Environmental protection and energy saving: set alarm values according to the concentration of carbon monoxide in the garage and link the fans to avoid energy wastage due to high exhaust air frequency.

Monitoring position: on the wall and column behind the car

Monitoring factors: carbon monoxide (CO), carbon dioxide (CO2), oxygen (O2)

Data transmission: wired or wireless

1) Wired transmission: the gas detection alarm is transmitted to the gas alarm controller in the form of a 4-20mA current signal or an RS485 bus system digital signal, which is then converted into an RS232 signal and transmitted to a computer terminal.

2) Wireless transmission: the gas detection and alarm instrument transmits data to the gas alarm controller in the form of RTU433 or GPRS wireless transmission, and then transmits wirelessly to the computer terminal through the Internet network.

Gas detectors