Building owners, facility managers and occupants all have a role to play in maintaining good indoor air quality for the health and comfort of occupants in buildings. They can take guidance from the Singapore Standard (SS 554) for Indoor Air Quality for Air-Conditioned Buildings which specifies good practices in managing indoor air quality as well as standards and limits of indoor air quality parameters.

To assess the adequacy of ventilation, measurement of ventilation rate is required. If not possible, carbon dioxide levels at occupied areas may be used as a surrogate. According to SS554, high carbon dioxide levels, more than 700 ppm in excess of outdoor level, indicates poor ventilation or overcrowding. In view of the current COVID-19 situation, premises owners should achieve lower levels.

Features
- Industrial grade sensor
- Measure and display CO2 concentration, temperature and humidity at the same time
- Big size color VA display
- Yellow: 1200 to 1999ppm; Red: over 2000ppm
- 3-colours LED Alarm and buzzer alarm
- Re-chargeable lithium battery