Introduction

The Puripher CarboSafe is an electronic precision measuring instrument which not only reacts to unburnt CO gas, 
but also to other gases that are released at imperfect combustion. The Puripher CarboSafe has a built-in 
self-checking routine which calibrates the equipment at regular intervals, making the Puripher CarboSafe highly 
reliable. An important application of the CarboSafe is monitoring the CO-level in greenhouse cultivations thus 
securing a safe CO dosage.



Principle of operation

Once activated, the CarboSafe provides a constant sampling of flue gases through a built-in pump system. Before 
the sample gas enters the instrument, it is first cooled down, dried and filtered. Then it can be measured and 
analyzed. For the measurement a semi-conductor is used, which shows a change in resistance when any unburnt 
element is present in the flue gas. This leads to a current variation which, after amplification, is compared to a set 
value. When exceeding the set value the CarboSafe will alert. In total 4 levels of alarm can be set.