High-Precision Nitrogen Oxide Sensor for CAT Engines

Premium OEM Replacement
– Direct-fit 539-0118/539-0118-02 sensor with identical specs to CAT original, ensuring seamless integration and optimal engine performance.
Advanced Ceramic Core Technology
– High-sensitivity electrochemical cell for ultra-accurate NOx detection, reducing false readings and extending service life.
Rugged Industrial Design
– Stainless steel housing with IP67-rated waterproofing, built to withstand extreme temperatures (-40°C to +125°C) and harsh mining/construction environments.
Emission Compliance Ready
– Meets EPA Tier 4/Stage V standards, ideal for CAT excavators, bulldozers, and gensets requiring real-time exhaust monitoring.
Factory-New Condition
– 100% unused with OEM-grade connectors and anti-corrosion coatings, shipped in protective packaging.
Global Stock Availability
– Bulk wholesale pricing with same-day dispatch from US/EU/Asia warehouses, backed by 12-month warranty.
Key Applications
: Aftertreatment systems, fleet maintenance, off-road equipment repair, and emission testing.