CO2 measurement – Dwyer Instruments Blog

Series CDT-S Carbon Dioxide and Temperature Transmitter

Dwyer recently released its new -S option for the Series CDT carbon dioxide and temperature transmitters. Built upon Dwyer’s standard carbon dioxide transmitter, the -S option has a front-facing LED that illuminates when the CO2 level exceeds 1,100 PPM.

This new feature addresses concerns raised by legislation, including California Assembly Bill 841 and Nevada Assembly Bill 257. California’s Assembly Bill 841 was signed into law in 2020, while Nevada’s Assembly Bill 257 was approved in 2021. These bills proposed several provisions governing indoor air quality in the public school system, including that each classroom will be equipped with a carbon dioxide monitor that: Continue reading “Monitor CO2 in Schools with the CDT-S Transmitters!”

Plants thrive on CO2 for growth while producing oxygen. One thing that many people do not know is that the optimal concentration for plant growth is over three times the atmospheric CO2 concentration today.¹ This being the case, indoor gardens would be remiss if they didn’t attempt to elevate the CO2 levels in their environments to the ideal concentration. The most common way to increase the CO2 concentration is to use a propane burner to create CO2. The problem with having a propane burner in an enclosed space is that you need to know when to turn the burner on and off, as CO2 levels that rise above 1500 ppm are actually harmful to plants. Continue reading “Keeping it Green: Monitoring CO2 Levels in Greenhouses”