UEi Smart Bell Plus Combustion Tester Meter provides real time data that gives data on the condition of the combustion process of the user's equipment. This information is required for proper setup and maintenance to verify correct operation. Benefits of using the Smart Bell Plus are increasing efficiency which would reduce fuel costs, verifying proper combustion to reduce future problems, and to check for safe operation. An out of balance combustion process can increase the need for maintenance, create an excess amount of emissions, lead to safety concerns or waste fuel and money. By checking for proper operation, user's can confirm a job well done. UEi Smart Bell Plus Combustion Tester  Meter comes complete with: flue probe (KMCP70), protective boot with magnet, and a soft carrying case (AC73).