OTC 5025 Diesel Exhaust Fluid (DEF) Refractometer
SKU: 73975641100

OTC 5025 Diesel Exhaust Fluid (DEF) Refractometer

Sale price$105.22 Regular price$116.91
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Description

OTC 5025 Diesel Exhaust Fluid (DEF) RefractometerThe Refractometer is a portable. precision. optical instrument used for measuring the Diesel Exhaust Fluid (DEF) concentration. When a liquid sample is placed on the prism. the light passing through it is bent. The more concentrated the liquid. the more the light will bend. The Refractometer contains a reticle. or scale. that is enlarged through the eyepiece to measure this light. The values on the scale have been established to evaluate the DEF

The Refractometer is a portable. precision. optical instrument used for measuring the Diesel Exhaust Fluid (DEF) concentration. When a liquid sample is placed on the prism. the light passing through it is bent. The more concentrated the liquid. the more the light will bend. The Refractometer contains a reticle. or scale. that is enlarged through the eyepiece to measure this light. The values on the scale have been established to evaluate the DEF condition. EPA regulations require all diesel engines manufactured on or after January 1. 2010 to meet lowered NOx emissions standards. Most heavy duty engine (Class 7-8 trucks) manufacturers. have chosen to utilize SCR.

Features

  • The refractometer is a portable precision optical instrument used for measuring the diesel exhaust fluid concentration

  • When a liquid sample is placed on the prism the light passing through it is bent and the more concentrated the liquid the more the light will bend

  • The refractometer contains a reticle or scale that is enlarged through the eyepiece to measure this light and the values on the scale have been established to evaluate the DEF condition

  • EPA regulations require all diesel engines manufactured on or after January 1 2010 to meet lowered NOx emissions standards

  • Most heavy duty engine manufacturers have chosen to utilize SCR including Detroit Diesel DD13 DD15 DD16 Cummins ISX line PACCAR and Volvo-Mack

Specifications

Brand Name: OTC

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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
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SKU: 73975641100

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Bowzr
New York, US
★★★★★ 5
Mobil 1 M1-103A
Size: 64mm x 14
Fits Perfect on Mobil 1 M1-103A.. for 2010 Scion XB. Snaps on and doesn't fall off, easily removed after the oil filter is loose.. Very happy with the fit, function and quality!
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Reviewed in the United States on August 17, 2025
A
Verified Purchase
Aspen Valdez
Pawtucket, US
★★★★★ 5
Fits 2011 335xi n55 prefect
Fits my 2011 335xi n55 engine perfectly. Comes on and off easily and gets the filter loose quickly. Amazing quality
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Reviewed in the United States on March 15, 2026
C
Verified Purchase
Clint
Waukegan, US
★★★★★ 5
Works perfect for BMW S63 engine.
I used this to change the oil on my BMW M8 with the S63 engine. It was a perfect fit. It extended far enough onto the filter housing to be quite secure with no risk of slipping off and stripping the housing. It was snug on the housing and did not bind up due to having a loose fit. The tool feels well-built and I suspect it will outlive me given my occasional personal use. It would still probably hold up well even for daily shop use as long as it was not abused (repeatedly dropped, slammed around, etc).
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Reviewed in the United States on September 8, 2025
C
Verified Purchase
Chad altenbach
Battle Creek, US
★★★★★ 5
Made well and great fit
Fits perfectly and is made well
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Reviewed in the United States on May 8, 2026
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Dalia Toppin
Fort Morgan, US
★★★★★ 5
Make sure you know the size
Yes worked like a charm
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Reviewed in the United States on April 5, 2026

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