The Freightliner And Detroit 21 Inch Long DPF Outlet Temperature Sensor is a reliable and efficient solution for maintaining proper ATS functionality without compromising fuel consumption. This sensor, sold individually, is directly replaceable with OE sensors and has been rigorously tested and accredited by third-party organizations. With its easy installation and compatibility with most Freightliner and Detroit makes and models, this sensor is a practical choice for ensuring optimal exhaust emission control. Measuring 21 inches long and 1.56 inches wide and tall, it meets EPA 10 standards and contributes to a cleaner and more environmentally friendly operation.