Martechnic Adds New Test Kit “MT UREA CHECK” to Its Product Range
2025-02-01

The test kit is designed for rapid on-board determination of urea concentration in marine diesel exhaust fluid (DEF) AUS 40 (aqueous urea solution at 40 % concentration). The quality and appropriate concentration of urea in AUS 40 is crucial for optimal performance of diesel engines with SCR (selective catalytic reduction) system. The prolonged storage of AUS 40 and high temperatures can lead to its gradual decomposition and thus have a negative effect on the urea concentration.
The customized test kit “MT UREA CHECK” enables measuring of urea concentration in AUS 40 by means of UREA REFRACTOMETER and determination of pH value with special INDICATOR PAPER.

Utilizing the test kit, the quality marine diesel exhaust fluid (DEF) AUS 40 can be assessed in accordance with ISO 18611-1:2014, and the following possible error sources can be promptly determined:
- Technical deviating specifications
- Thermal instability (shelf life)
- Dilution (possibly chemical contamination)