DuraWRX DEF Header with Helical Heater, 40 Micron In-Tank Filter, 11" Digital Level Sensor by DuraWRX is a purpose-built DEF header assembly designed to restore reliable fluid sensing, filtration, and freeze protection in diesel SCR systems. This header integrates ultrasonic solid-state sensing for level, concentration and temperature monitoring and uses a digital CANbus-compatible output to deliver precise, repeatable level data to dosing and control modules. The assembly includes a 40 micron in-tank filter to remove particulates that can foul pumps and dosing valves, and a helical coolant-powered heater that supports DEF thawing in low-temperature conditions down to -40 °F (-40 °C). The 11-inch header height and industry-standard fittings plus Deutsch electrical connector provide a form-fit replacement option for a wide range of on- and off-highway applications. By replacing worn or mechanical-style sensors with this integrated header, fleets can reduce sensor-related false low-level alerts and dosing interruptions that lead to unscheduled service events. The solid-state ultrasonic approach eliminates moving parts that commonly fail from contamination or deposit buildup, improving measurement stability over time. The combination of a fine 40μ filter and integrated heater helps prevent particulate-induced pump wear and crystallization during freeze/thaw cycles, which reduces component replacement frequency and service labor associated with DEF system faults. Digital output compatibility simplifies integration with modern dosing units and control systems, helping restore accurate dosing behavior and minimizing NOx control disruptions. Designed for heavy-duty service environments, this DuraWRX header supports consistent DEF system performance to help maintain vehicle uptime and predictable maintenance intervals.