https://www.tongdy.com/product/msd-18
The Tongdy MSD-16/MSD-18 monitor is an indoor air quality monitor that measures all 5 parameters required by the RESET™ Air Standard for Commercial Interiors, including PM2.5, TVOC, CO2, temperature, and humidity.
The Tongdy MSD-16/MSD-18 is an interior RESET™ Air Accredited Grade B monitor.
Known to work with the following RESET Air Accredited Data Providers: QLEAR, gams, Carbon Credentials.