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Chennai Metro Rail | Chennai Metro Rail Corporation Limited
Chennai Metro Rail | Chennai Metro Rail Corporation Limited
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Chennai metro installs sensors to check air quality at underground stations

Chennai metro installs sensors to check air quality at underground stations

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The Chennai Metro Rail Limited, CMRL, has installed sensors at underground stations to monitor indoor air quality. With this move, CMRL hopes to provide a comfortable environment for the increasing number of patrons for metro trains.

According to a metro rail official, Every station will have sensors that will continuously monitor carbon dioxide levels while ventilation and air conditioning systems filter out particulate matter. The sensors are installed to ensure comfort of commuters though each may wait at an underground station for a maximum of only 10 minutes. If the levels go up, the sensor will trigger an alarm.

CMRL follows norms prescribed by National Building Code and American Society of Heating, Refrigerating and Air-Conditioning Engineers (Ashrae) to monitor air quality. Experts said CO2 levels depend on the number of commuters and frequency of trains.

Say officials, Air-conditioning systems are installed with filters that throw out dirt, dust, pollen, smoke and other pollutants. The ventilation and air-conditioning system will keep stations cool, ensure air flow through the tunnels, draw out smoke during emergencies and remove heat generated.

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