https://hbtmkto.honeywell.com/IAQ-product-data-sheet-landing-page.html
This monitor is an advanced, configurable device for commercial buildings. It monitors PM2.5/PM10, CO2, TVOC, temperature and relative humidity. This device communicates using the Modbus protocol over RS-485 and easily integrates with the building management operation.
The built-in commercial grade, high-precision sensor module, supports long-term stable and reliable application.
The Honeywell In-Duct IAQ Monitor C7355B1052 is an in-duct RESET Air Accredited Grade B monitor for all 5 parameters.