optris CSmicro – E2015-12-A 
34 
 
Air Purge Collars [LT/ 3M/ 2WLT/ 2W2M] 
 
The lens must be kept clean at all times from dust, smoke, fumes and other contaminants in order to avoid 
reading errors. These effects can be reduced by using an air purge collar. Make sure to use oil-free, 
technically clean air, only. 
 
       
 
Standard air purge collar;  Laminar air purge collar – the sideward 
fits to the mounting bracket;  air outlet prevents a cooling down of the object 
hose connection: 3x5 mm  in short distances; hose connection: 3x5 mm 
[ACCSAP]/ for heads with a  [ACCTAPL] 
D:S ratio ≥ 10:1 
 
 
 
 
The needed amount of air (approx. 2...10 l/ min.) depends on the application 
and the installation conditions on-site.