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📞 1300 987 789 |


AdBlue® CONCENTRATE Checker.

AdBlue® is the registered trademark for AUS32 (Aqueous Urea Solution32.5%) and is used in a process called selective catalytic reduction (SCR) to reduce emissions of oxides of nitrogen from the exhaust of diesel engined motor vehicles. It is a 32.5% solution of high-purity urea in demineralised water that is clear, non-toxic and safe to handle.

Designed for checking the concentration of AdBlue®. AdBlue® is a urea additive in the exhaust flow, which reduces NOx- emissions in HGVs and Light Commercials. This refractometer can check the concentration of AdBlue® with just a small amount of fluid.


  • Refractometer.
  • Precision Screwdriver.
  • Dropper.
  • Cleaning Cloth.



It is important to regulate the temperature of the sample, the instrument and the room as much as possible. Changes in temperature can affect the final result.


You may need to calibrate the instrument before use or after a rise or fall in temperature.

  1. Open the cover plate.
  2. Drop 1/2 drops of distilled water onto the prism.
  3. Close the cover plate and press gently.
  4. Rotate and adjust the calibration screw until the light blue boundary line meets the zero line.
  5. Clean the prism once calibrated.
Contact PETRO industrial's team of bulk fuel storage and dispensing specialists for more information today!