Description:NOx emissions sensors like 11R-1294 sense nitrogen oxide content in combustion gases and send an electrical signal indicating nitrogen oxide content.Attributes:• Cat Reman NWC offerings contain 100% new Cat parts at a reduced price in exchange for a qualifying core.• Cat Reman NWC sensors offer the productivity and efficiency of new sensors for less than the cost of new with return of a qualifying core.• Cat Reman NWC sensors come with a same-as-new Caterpillar Limited Warranty. 1• Cat Reman offers off-the-shelf availability. 21 Warranty can vary by model and application; limitations may apply. For complete details about the applicable Caterpillar Limited Warranty, contact an authorized Cat dealer.2 Part may not be available off-the-shelf at all times and in all locations.