A cloud-based CO2 monitoring system was configured by OTM for air quality monitoring in the COVID-19 situation.
Application
The following two documents were followed in this application:
- Advisory on CO2 Monitoring to Assess Ventilation Adequacy (a webpage at NEA website)
- Guidance Note on Improving Ventilation and Indoor Air Quality in Buildings amid the COVID-19 Situation (a PDF at BCA website)
The CO2 level monitored is used as a proxy to justify the ventilation adequacy in the COVID-19 situation:
- If the CO2 level is above 800 ppm, the ventilation may not be sufficient;
- If the CO2 level is above 1100 ppm, the ventilation level is insufficient according to Singapore Standard SS554:2016.
Instrument
Delta Ohm HD50 web data logger was used for this application. The model selected was HD50G1NBTV. It has built-in probes for CO2, temperature, and humidity measurement.
The instrument can meet all requirements specified by NEA/BCA. It also automatically uploads the data to Delta Ohm cloud via ethernet or wifi. Shown below are the results displayed in the cloud portal.
The instrument was pre-configured by OTM. The end user just needed to do the last-step mechanical mounting. All authorized users can access the results at the cloud portal with a browser and it is very convenient for facility managers who are busy with many things.