Overview

The PEX 193NOX2003 is a heavy‑duty NOx sensor engineered for diesel exhaust aftertreatment systems. It provides accurate nitrogen‑oxide measurement in high‑temperature, high‑flow streams so the ECU can precisely control SCR dosing and reduce urea consumption. Built for fleet duty, the unit is designed to survive heat, vibration, and corrosive exhaust while delivering stable measurements that help avoid emissions violations and engine derates.

Performance & Integration

With a fast response time under 1 second, the sensor tracks rapid load changes to keep DEF injection on target. It withstands exhaust gas temperatures of approximately 800–900°C and maintains signal integrity under harsh conditions. The sensor’s proportional output (current or voltage as used by the ECU) enables closed‑loop control. Install upstream to monitor raw engine-out NOx for SCR dosing optimization, or downstream to verify NOx reduction across the catalyst and validate aftertreatment performance.

Applications & Replacement

Designed as a plug‑and‑play solution for common Cummins applications, the PEX 193NOX2003 replaces Continental 5WK96672A (also cross‑referenced as 5WK96672) and select Cummins references. Engineered in Germany with high‑grade materials, it supports diagnostics across SCR, DPF, and EGR systems by enabling comparison of upstream/downstream readings. For fleets and service operations, this direct‑fit sensor streamlines replacement, helps maintain emissions compliance, and keeps equipment in service.