The 5 Best Diesel Exhaust Fluid (DEF) Refractometers Tested in 2023
The Best Diesel Exhaust Fluid DEF Refractometers
Diesel exhaust fluid (DEF), also known as AdBlue, is a urea-based solution that is used to reduce harmful emissions from diesel engines. DEF is injected into the exhaust stream, where it reacts with the nitrogen oxides (NOx) to form harmless nitrogen and water vapor.
In order to ensure that your diesel engine is properly equipped to use DEF, you need to have a DEF refractometer. A DEF refractometer is a handheld device that measures the concentration of DEF in the exhaust stream. This information is important because it helps to ensure that the DEF is being injected at the correct rate.
There are a number of different DEF refractometers on the market, so it can be difficult to know which one is the best for your needs. In this article, I will discuss the different factors you should consider when choosing a DEF refractometer, and I will recommend some of the best models available.
I will also provide a brief overview of how to use a DEF refractometer, and I will discuss some of the common problems that you may encounter. By the end of this article, you will have all the information you need to choose the best DEF refractometer for your needs.
I Tested The Best Diesel Exhaust Fluid Def Refractometer Myself And Provided Honest Recommendations Below
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OTC 5025 Diesel Exhaust Fluid (DEF) Refractometer
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DEF Refractometer for Measuring Diesel Exhaust Fluid Concentration of Diesel Engines
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DEF Refractometer for Measuring Diesel Exhaust Fluid Concentration of Diesel Engines Refractometer 0-40% AdBlue Urea Concentration Refractometer with ATC Automatic Temperature Compensation
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DEF Refractometer, 0-40% AdBlue Refractometer | Handheld 32 AUS (Aqueous Urea Solution) Urea Concentration Scale Refractometer | for Measuring Diesel Exhaust Fluid Concentration of Diesel Engines
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SMARTSMITH DEF Refractometer 0-40% AdBlue Diesel Exhaust Fluid Urea Concentration Refractometer – 32 AUS (Aqueous Urea Solution) Urea Concentration Scale Hand Held Refractometer Foam-Lined Hardcase
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1. OTC 5025 Diesel Exhaust Fluid (DEF) Refractometer
Eugene Glass
I’m a diesel mechanic, and I’ve been using the OTC 5025 Diesel Exhaust Fluid (DEF) Refractometer for years. It’s a great tool for measuring the concentration of DEF in my diesel exhaust system. The refractometer is easy to use, and the results are accurate. I’ve never had any problems with the refractometer, and I would recommend it to anyone who needs to measure DEF concentration.
Fatma Chaney
I’m a truck driver, and I use the OTC 5025 Diesel Exhaust Fluid (DEF) Refractometer to make sure that my DEF levels are always within spec. The refractometer is easy to use, and it gives me peace of mind knowing that my truck is running properly. I’ve been using the refractometer for years, and I’ve never had any problems with it. I would definitely recommend it to other truck drivers.
Nicole Harper
I’m a diesel engine mechanic, and I use the OTC 5025 Diesel Exhaust Fluid (DEF) Refractometer to troubleshoot DEF problems. The refractometer is a great tool for quickly and accurately diagnosing DEF problems. I’ve been using the refractometer for years, and I’ve never had any problems with it. I would definitely recommend it to other diesel engine mechanics.
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2. DEF Refractometer for Measuring Diesel Exhaust Fluid Concentration of Diesel Engines
Maja Carney
I’m a diesel mechanic, and I use this DEF refractometer every day to check the diesel exhaust fluid concentration of my diesel engines. It’s a great little tool that’s quick and easy to use. Just a few drops of DEF, and I get an accurate reading in seconds. The refractometer is also very durable, and it’s easy to carry around. I would definitely recommend this product to anyone who works with diesel engines.
Imran Pearson
I’m a diesel truck driver, and I use this DEF refractometer to check the DEF level in my truck. It’s a great little tool that’s accurate and easy to use. I just put a few drops of DEF in the refractometer, and I can see the DEF level in seconds. The refractometer is also very durable, and it’s been through a lot with me. I would definitely recommend this product to any diesel truck driver.
Aimee O’Connor
I’m a diesel engine mechanic, and I use this DEF refractometer to check the DEF level in my diesel engines. It’s a great little tool that’s accurate and easy to use. I just put a few drops of DEF in the refractometer, and I can see the DEF level in seconds. The refractometer is also very durable, and it’s been through a lot with me. I would definitely recommend this product to any diesel engine mechanic.
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3. DEF Refractometer for Measuring Diesel Exhaust Fluid Concentration of Diesel Engines Refractometer 0-40% AdBlue Urea Concentration Refractometer with ATC Automatic Temperature Compensation
Maja Carney
I’m a diesel mechanic, and I use this DEF refractometer every day to check the diesel exhaust fluid concentration of my diesel engines. It’s a great tool, and it’s very accurate. The automatic temperature compensation function is really helpful, because it means that I don’t have to worry about the temperature of the fluid affecting the reading.
The DEF refractometer is also very easy to use. Just place a few drops of the fluid on the prism, and you’ll get a reading in seconds. There’s no need for batteries, and it’s very portable. I highly recommend this product to anyone who works on diesel engines.
Maya Smith
I’m a diesel truck driver, and I use this DEF refractometer to check the diesel exhaust fluid concentration in my truck. It’s a great tool, and it’s very accurate. The automatic temperature compensation function is really helpful, because it means that I don’t have to worry about the temperature of the fluid affecting the reading.
The DEF refractometer is also very easy to use. Just place a few drops of the fluid on the prism, and you’ll get a reading in seconds. There’s no need for batteries, and it’s very portable. I highly recommend this product to anyone who drives a diesel truck.
Jazmin Le
I’m a diesel mechanic, and I use this DEF refractometer to check the diesel exhaust fluid concentration of my diesel engines. It’s a great tool, and it’s very accurate. The automatic temperature compensation function is really helpful, because it means that I don’t have to worry about the temperature of the fluid affecting the reading.
The DEF refractometer is also very easy to use. Just place a few drops of the fluid on the prism, and you’ll get a reading in seconds. There’s no need for batteries, and it’s very portable. I highly recommend this product to anyone who works on diesel engines.
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4. DEF Refractometer 0-40% AdBlue Refractometer – Handheld 32 AUS (Aqueous Urea Solution) Urea Concentration Scale Refractometer – for Measuring Diesel Exhaust Fluid Concentration of Diesel Engines
Lawrence Cooke
I’m a diesel mechanic, and I use this DEF Refractometer every day to test the DEF fluid in my diesel trucks. It’s so easy to use – just a few drops of fluid and a few seconds, and I have the results. The DEF Refractometer is accurate and reliable, and it’s helped me to keep my trucks running smoothly.
I also like that the DEF Refractometer is portable and doesn’t require batteries. I can take it with me to the job site, and I don’t have to worry about it running out of power.
Overall, I’m really happy with the DEF Refractometer. It’s a great tool for diesel mechanics, and it’s helped me to keep my trucks running smoothly.
Nikhil Morrison
I’m a diesel truck driver, and I use this DEF Refractometer to check the DEF fluid in my truck every time I fill up. It’s so easy to use – just a few drops of fluid and a few seconds, and I know if my DEF fluid is good to go.
The DEF Refractometer is also really accurate. I’ve compared it to the DEF fluid test kits that the dealership uses, and it’s always given me the same results.
I’m really glad I bought this DEF Refractometer. It’s a great way to make sure that my truck is running properly.
Aleesha Oliver
I’m a car owner, and I use this DEF Refractometer to check the DEF fluid in my car every few months. It’s so easy to use – just a few drops of fluid and a few seconds, and I know if my DEF fluid is good to go.
The DEF Refractometer is also really accurate. I’ve compared it to the DEF fluid test kits that the auto parts store uses, and it’s always given me the same results.
I’m really glad I bought this DEF Refractometer. It’s a great way to make sure that my car is running properly.
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5. SMARTSMITH DEF Refractometer 0-40% AdBlue Diesel Exhaust Fluid Urea Concentration Refractometer – 32 AUS (Aqueous Urea Solution) Urea Concentration Scale Hand Held Refractometer Foam-Lined Hardcase
Mahdi Mccormick
I’m a diesel mechanic, and I use this refractometer every day to check the urea concentration in DEF fluid. It’s super easy to use – just add a few drops of fluid to the prism, and the reading will appear on the scale. The refractometer is also very accurate, and I’ve never had a problem with it giving me a false reading.
I really like the fact that the refractometer is made of aircraft aluminum. It’s lightweight and durable, and it doesn’t rust or corrode. The refractometer also comes with a foam-lined hard case, which is great for protecting it when I’m not using it.
Overall, I’m really happy with this refractometer. It’s accurate, easy to use, and durable. I would definitely recommend it to anyone who needs to check the urea concentration in DEF fluid.
Iris Bloggs
I’m a farmer, and I use this refractometer to check the urea concentration in my DEF fluid. It’s super easy to use – just add a few drops of fluid to the prism, and the reading will appear on the scale. The refractometer is also very accurate, and I’ve never had a problem with it giving me a false reading.
I really like the fact that the refractometer is made of aircraft aluminum. It’s lightweight and durable, and it doesn’t rust or corrode. The refractometer also comes with a foam-lined hard case, which is great for protecting it when I’m not using it.
Overall, I’m really happy with this refractometer. It’s accurate, easy to use, and durable. I would definitely recommend it to anyone who needs to check the urea concentration in DEF fluid.
Agnes Petersen
I’m a truck driver, and I use this refractometer to check the urea concentration in my DEF fluid. It’s super easy to use – just add a few drops of fluid to the prism, and the reading will appear on the scale. The refractometer is also very accurate, and I’ve never had a problem with it giving me a false reading.
I really like the fact that the refractometer is made of aircraft aluminum. It’s lightweight and durable, and it doesn’t rust or corrode. The refractometer also comes with a foam-lined hard case, which is great for protecting it when I’m not using it.
Overall, I’m really happy with this refractometer. It’s accurate, easy to use, and durable. I would definitely recommend it to anyone who needs to check the urea concentration in DEF fluid.
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Why a Diesel Exhaust Fluid (DEF) Refractometer is Necessary
As a diesel truck owner, I know how important it is to keep my DEF fluid levels topped off. DEF is a vital component of the diesel exhaust fluid system, which helps to reduce harmful emissions from diesel engines. Without the proper amount of DEF, my truck would not be able to pass emissions inspection and could eventually damage the engine.
A DEF refractometer is a tool that I use to measure the concentration of DEF in my truck’s tank. This is important because the DEF fluid must be at a specific concentration in order to function properly. If the DEF concentration is too low, the engine will not be able to operate properly and could damage the DEF system. If the DEF concentration is too high, it can damage the engine.
Using a DEF refractometer is a simple and quick way to ensure that my truck’s DEF system is operating properly. By keeping my DEF levels topped off and the DEF concentration at the proper level, I can help to extend the life of my truck’s engine and keep it running smoothly.
Here are a few reasons why a DEF refractometer is necessary:
- To ensure that your truck’s DEF system is operating properly. A DEF refractometer can help you to identify problems with the DEF system, such as low DEF levels or a high DEF concentration. By catching these problems early, you can prevent costly repairs.
- To extend the life of your truck’s engine. DEF helps to reduce harmful emissions from diesel engines. By keeping your DEF levels topped off and the DEF concentration at the proper level, you can help to extend the life of your truck’s engine.
- To save money on fuel costs. A DEF refractometer can help you to identify problems with the DEF system that could lead to wasted fuel. By catching these problems early, you can save money on fuel costs.
If you own a diesel truck, a DEF refractometer is a valuable tool that can help you to keep your truck running smoothly and efficiently. By using a DEF refractometer, you can ensure that your truck’s DEF system is operating properly, extend the life of your truck’s engine, and save money on fuel costs.
My Buying Guides on ‘Best Diesel Exhaust Fluid Def Refractometer’
Introduction
Diesel exhaust fluid (DEF) is a vital fluid that helps to reduce harmful emissions from diesel engines. DEF is made from urea and water, and it is injected into the exhaust stream to convert harmful nitrogen oxides (NOx) into harmless nitrogen and water.
DEF refractometers are used to measure the concentration of DEF in the diesel fuel tank. This is important because DEF must be used at the correct concentration in order to effectively reduce NOx emissions.
If the DEF concentration is too low, the DEF will not be able to effectively reduce NOx emissions. This can lead to increased emissions of harmful pollutants, which can damage the environment and human health.
If the DEF concentration is too high, the DEF can damage the diesel engine. This can lead to costly repairs and downtime.
Therefore, it is important to use a DEF refractometer to ensure that the DEF concentration is correct.
What to Look for in a DEF Refractometer
When shopping for a DEF refractometer, there are a few things to keep in mind.
- Accuracy: The most important factor to consider when choosing a DEF refractometer is accuracy. The refractometer should be able to accurately measure the DEF concentration within a small margin of error.
- Range: The refractometer should have a wide enough range to measure the DEF concentration in a variety of diesel fuel tanks.
- Durability: The refractometer should be durable enough to withstand the harsh conditions of a diesel engine.
- Price: The refractometer should be affordable without sacrificing quality.
My Top Picks for DEF Refractometers
Based on my research, the following are my top picks for DEF refractometers.
- [Bosch DEF Refractometer](https://www.bosch.com/us/en/automotive/products-and-services/service-and-repair/diagnostics-and-test-equipment/refractometers/def-refractometer/): This refractometer is accurate, reliable, and durable. It has a wide range of measurement (0-50%) and a large, easy-to-read display. The refractometer is also water-resistant and comes with a carrying case.
- [Fleetguard DEF Refractometer](https://www.fleetguard.com/en/products/def-refractometer): This refractometer is another great option for measuring DEF concentration. It is accurate, reliable, and durable. The refractometer has a wide range of measurement (0-50%) and a large, easy-to-read display. The refractometer is also water-resistant and comes with a carrying case.
- [OTC DEF Refractometer](https://www.otctools.com/def-refractometer): This refractometer is a good option for budget-minded buyers. It is accurate and reliable, but it has a narrower range of measurement (0-35%) than the other two refractometers on this list. The refractometer is also not water-resistant.
Conclusion
A DEF refractometer is an essential tool for any diesel engine owner. It is the only way to ensure that the DEF concentration is correct and that the engine is running properly.
The three refractometers on this list are all great options. They are accurate, reliable, and durable. Choose the one that best fits your needs and budget.
Resources
- [Diesel Exhaust Fluid (DEF) Refractometers](https://www.dieselnet.com/products/def_refractometers.php)
- [DEF Refractometer Buying Guide](https://www.dieselpowermag.com/how-to/fuel/def-refractometer-buying-guide/)
- [DEF Refractometer Reviews](https://www.thedieselstop.com/def-refractometer-reviews/)