Carbon Monoxide (CO), Nitric Oxide (NO) & Natural Gas (CNG) Gas Detection in Under Ground Car Parking Area
Exhaust fumes emanating from fuel burning vehicles are highly toxic and can result in sickness and even death, if not ventilated properly. By monitoring the concentration of these fumes and ventilating based on their concentration, a safe environment can be ensured.
Carbon Monoxide and its Effects :
Carbon Monoxide (CO) is a colorless and tasteless gas that is highly toxic to humans and animals; it bonds with hemoglobin and reduces the oxygen-carrying capacity of blood in the body. Its chemistry consists of one carbon atom and one oxygen atom. CO is produced from the partial oxidation of carbon-containing compounds; it forms when there is not enough oxygen to produce carbon dioxide (Co2), such as when operating a combustion engine in an enclosed space.
The level of CO concentration is measured in parts per million (ppm). For example, 100 ppm CO means that for every 1,000,000 molecules of air, 100 of those molecules are CO. In addition to determining the current level of CO concentration, another method used is the Time Weighted Average (TWA). This measures a person’s average exposure (in ppm) to CO over a time span. For example, if a person were exposed to a large dose of CO in the morning but none afterwards into the evening, the TWA for the entire day would be low. However, if a person is continually exposed to 20 ppm CO throughout the day, the TWA will be 20 ppm for that duration.
Type of fuels being used:
If vehicles being monitored are natural gas powered only, then CO monitoring is sufficient. If however, diesel vehicles are being used, nitrogen dioxide (NO2) sensors should be used as well.
Number of areas or zones:
If an area is to be partitioned into distinct areas for the purpose of ventilation, alarming, or other control functions, sensors can be lumped together in a per zone basis.
Alarm contacts required, or will the user be providing control functions, therefore requiring only transmitters with analog (4-20 mA) output/ RS-485.
For detail refer bellow Address.
Mrs. Sonali Masurekar