The UEi CP2 is a flue probe used for sampling combustion gases and flue temperature during combustion analyis.
The  CP2 features a 10.5 in. probe shaft with adjustable depth stop and a  76.5 in. sampling hose that is compatible with the following UEi  products:
Current Products
 COA, CEA, C160, HET, C161, C163, C165+,  C165+N
Retired Products
C162, C163, C164, C165
  CP2 is backed by a 1-Year limited warranty.