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MISCO DEF-201 Refractometer Urea-Based Diesel Exhaust Fluid (DEF) AdBlue - Refurbished


  • $ 34999

MISCO DEF-201 (PA201x-185) Digital Refractometer Measures Urea in Water Concentrations of Diesel Exhaust Fluid (DEF) - Refurbished

The MISCO DEF-201 (PA201x-185) digital refractometer is the ideal method for testing and monitoring the concentration of urea-based Diesel Exhaust Fluid (DEF or AdBlue) required by diesel engines equipped with Selective Catalytic Reduction (SCR) technology. This refractometer has a single scale for DEF concentration.

Range: 0.0 to 51.0 Urea % wt (% Weight/Weight)
Divisions: 0.1 Urea % wt
Accuracy: 0.1 Urea % wt
Automatic Temperature Compensation Range (Air Temperature Range): 0.0-50.0°C


The MISCO Palm Abbe DEF-201 refractometer is the ideal method for testing DEF fluid to ensure it is at the correct concentration and that it has not been diluted or tampered with. It only takes a few drops of DEF and a couple of seconds to perform a test and the results are precise to +/-0.1% urea concentration. 

Once a few drops of sample have been added to the stainless-steel well, it only takes the press of a single button to initiate a reading. Within seconds, the urea concentration will be displayed on the large 24-character backlit LCD display. The refractometer can also be calibrated to water with the press of a button.

Key to the precision and accuracy of the refractometer is the MISCO proprietary OPTICAL-ENGINE®. A combination of high-index sapphire optics and a detector array with 1,024 elements. Special hardware and software automatically temperature compensates readings over a wide temperature range.


30777 Rancho California #891420
Temecula, CA 92589
Phone: 310.748.6858  -  Fax: 310.733.5480  -  E-mail:  -  Website:

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