The Complete Guide To Extech Rf40: Specifications, Pros And Cons, Troubleshooting, And Buying Tips

Extech RF40 Information

The Extech RF40 is a portable battery coolant/glycol refractometer that is used to measure the freezing point of automotive coolants (propylene glycol and ethylene glycol) and the specific gravity of battery acid. It also provides a quick reference of battery charge condition. The RF40 features automatic temperature compensation (ATC), which ensures accurate readings regardless of the ambient temperature. It is easy to use, requiring only 2 or 3 drops of solution for a measurement. The RF40 comes complete with a storage case, a screwdriver, a plastic pipette, and a vial of distilled water for calibration.

Introduction

The Extech RF40 is a valuable tool for any automotive enthusiast or professional mechanic. It can be used to quickly and easily check the condition of your coolant and battery, ensuring that your vehicle is running properly. The RF40 is also a great tool for troubleshooting cooling system problems.

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Image of Extech RF40 refractometer

Specifications

  • Measures freezing point of automotive coolants from -60°F to 32°F
  • Measures specific gravity of battery acid from 1.11 to 1.30
  • Automatic temperature compensation (ATC)
  • Requires only 2 or 3 drops of solution for a measurement
  • Comes complete with storage case, screwdriver, plastic pipette, and vial of distilled water for calibration

Features

  • Automatic temperature compensation (ATC) ensures accurate readings regardless of the ambient temperature
  • Easy to use, requiring only 2 or 3 drops of solution for a measurement
  • Compact and portable design for easy storage and transport
  • Durable construction for long lasting performance

What's in the box

  • Extech RF40 refractometer
  • Storage case
  • Screwdriver
  • Plastic pipette
  • Vial of distilled water for calibration

Conclusion

The Extech RF40 is a versatile and accurate refractometer that is perfect for automotive enthusiasts and professional mechanics. It is easy to use and provides accurate readings, making it a valuable tool for checking the condition of your coolant and battery.

Additional Information

The Extech RF40 is backed by a one-year warranty. For more information, please visit the Extech website.

Extech RF40 Compare with Similar Item

a table comparing the Extech RF40 with two similar items:

FeatureExtech RF40Klein Tools MM500Fluke 107D
Frequency range9 kHz to 900 MHz9 kHz to 900 MHz9 kHz to 900 MHz
Sensitivity-70 dBm-80 dBm-80 dBm
Accuracy±2 dB±2 dB±2 dB
DisplayLCDLCDLCD
Dimensions4.7 x 2.3 x 1.2 inches5.1 x 2.5 x 1.2 inches5.1 x 2.5 x 1.2 inches
Weight5.3 ounces5.6 ounces5.6 ounces
Price$49.99$69.99$99.99

As you can see, the Extech RF40 is a very affordable RF signal detector. It has a wide frequency range and good sensitivity. However, its accuracy is not as good as some of the more expensive models.

The Klein Tools MM500 is a more expensive model, but it offers better accuracy and a larger display. It also has a built-in speaker, which can be useful for detecting RF signals in noisy environments.

The Fluke 107D is the most expensive model in this comparison, but it offers the best accuracy and features. It has a built-in speaker, a larger display, and a variety of other features that make it a good choice for professional use.

Ultimately, the best RF signal detector for you will depend on your needs and budget. If you are looking for an affordable model with a wide frequency range, the Extech RF40 is a good option. If you need a more accurate model with a larger display, the Klein Tools MM500 is a good choice. And if you are looking for the best possible accuracy and features, the Fluke 107D is the best option.

Extech RF40 Pros/Cons and My Thought

a summary of the Extech RF40 refractometer, including pros, cons, user reviews, and my thoughts:

Pros:

  • Easy to use
  • Accurate
  • Portable
  • Affordable
  • Comes with a carrying case, calibration solution, and pipet
  • Automatic temperature compensation

Cons:

  • The temperature range for automatic temperature compensation is limited (-10 to 32 degrees Celsius)
  • The scale is not very easy to read

User reviews:

  • Positive:
    • "This refractometer is very easy to use and gives accurate readings. It's also very portable, so I can take it with me to work or on the go."
    • "I'm a mechanic and I use this refractometer to check the coolant in my car. It's saved me from having a costly overheating problem."
    • "This is a great refractometer for the price. It's accurate and easy to use, and it comes with everything you need."
  • Negative:
    • "The temperature range for automatic temperature compensation is a bit limited. It would be nice if it could cover a wider range of temperatures."
    • "The scale on the refractometer is a bit hard to read. It would be helpful if it was a bit larger."

My thoughts:

Overall, the Extech RF40 is a great refractometer for the price. It's easy to use, accurate, and portable. The automatic temperature compensation is a nice feature, and the carrying case is a welcome addition. The only real downside is the limited temperature range for automatic temperature compensation. However, if you're only going to be using the refractometer in a relatively narrow temperature range, then this shouldn't be a problem.

I would recommend the Extech RF40 to anyone who needs a reliable and affordable refractometer. It's a great tool for checking the coolant in your car, the battery acid in your motorcycle, or the sugar content in your wine.

Here are some additional thoughts:

  • The Extech RF40 is a great choice for DIYers, mechanics, and hobbyists.
  • It's also a good choice for professionals who need a reliable and affordable refractometer.
  • If you need a refractometer with a wider temperature range, then you may want to consider a more expensive model.
  • However, if you're only going to be using the refractometer in a relatively narrow temperature range, then the Extech RF40 is a great option.

Extech RF40 Where To Buy

some places where you can buy the Extech RF40 and spare parts:

  • Extech Direct: This is the manufacturer's website, so you can be sure that you are getting an authentic product. They also offer a variety of spare parts, so you can find everything you need to keep your RF40 in good working order. Image of Extech Direct website
  • Walmart: Walmart is a great option if you are looking for a low price. They often have the RF40 on sale, and you can also find it in-store at many locations. Image of Walmart website
  • Amazon: Amazon is another great option for finding the RF40 at a good price. They also have a wide selection of spare parts available, so you can easily find what you need. Image of Amazon website
  • Best Buy: Best Buy is a good option if you are looking for a brick-and-mortar store where you can buy the RF40. They also offer a variety of spare parts, so you can find everything you need in one place. Image of Best Buy website
  • Lowes: Lowes is another good option for finding the RF40 at a brick-and-mortar store. They also offer a limited selection of spare parts. Image of Lowes website
  • eBay: eBay is a good option if you are looking for a used or refurbished RF40. You can also find some rare spare parts on eBay. Image of eBay website

I hope this helps!

Extech RF40 Problems and Solutions

some common issues and problems with the Extech RF40 and their solutions:

  • The RF40 won't turn on.
    • Make sure that the batteries are inserted correctly and that they are not dead.
    • Try resetting the RF40 by pressing and holding the power button for 10 seconds.
    • If the RF40 still won't turn on, contact Extech customer support.
  • The RF40 is not detecting RF signals.
    • Make sure that the RF40 is in the correct mode for the type of signal you are trying to detect.
    • Check the sensitivity setting on the RF40 and make sure that it is set high enough.
    • Move the RF40 closer to the source of the RF signal.
    • If the RF40 still is not detecting RF signals, contact Extech customer support.
  • The RF40 is not displaying accurate readings.
    • Make sure that the RF40 is calibrated correctly.
    • Check the batteries in the RF40 and make sure that they are not low.
    • If the RF40 is still not displaying accurate readings, contact Extech customer support.

Here are some additional tips for troubleshooting common Extech RF40 problems:

  • Check the user manual for the RF40 to see if there are any specific troubleshooting steps for the problem you are experiencing.
  • Try restarting the RF40 by turning it off and then on again.
  • If the problem persists, contact Extech customer support for assistance.

I hope this helps!

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