CO2 EASi sensor / controller 

CO2 EASi is an innovative CO2 sensor and controller from Harvest Master. It offers advanced monitoring of your plant's growing environment in one easy-to-use unit. As soon as Co2 Easi is swiched on, it learns how CO2 enrichment works in your growroom - it can even determine if you use bottle or burner. On a continuous basis, the CO2 EASi calculates and predicts CO2 enrichment operations for optimum plant growth. 

With CO2 enrichment you can raise 3 to 4 crops in the time frame of one unenhanced crop. As you would expect from Harvest Master, the CO2 EASi makes the whole process simple. Just plug in your Co2 and watch it go to work. It'll even identify where improvements can be made for more growth, increased yield, reduced CO2 use and lower electricity costs.

Take the guess work out of your growroom CO2 levels. CO2 EASi keeps tracks of it all. Not only does it provide automatic calculation and display of Co2 consumption rate, it gives you the predicted bottle life remaining! It's analitical nature also evaluates your cooling and exhaust systems efficiency.

This unit uses a light sensor to initiate the CO2 dispursement and has a high temperature sensor to disable a burner. There are plug-in options for cooling and fan control as well. Harvest Master CO2 EASi works especially well in hot areas, controlling temperature, humidity, and CO2.

An impressive low cost, intelligent CO2 enrichment sensor and controller in one effortless package.

More info from the Manufacturer (PDF format - Lots of detail.)