Extech Rf41: Everything You Need To Know – Specifications, Comparisons, Manuals, And Troubleshooting

Extech RF41 Information

The Extech RF41 is a portable battery coolant/glycol refractometer with automatic temperature compensation (ATC). It measures the freezing point of propylene/ethylene glycol coolants from -50°C to 0°C and the specific gravity of battery acid from 1.11 to 1.30. The RF41 also provides a quick reference of battery charge condition.

Specifications

Feature	Spec
Measuring range	Propylene/ethylene glycol freezing point: -50 to 0°C
Specific gravity of battery acid: 1.11 to 1.30
Automatic temperature compensation (ATC)	Yes
Accuracy	±0.2°C or ±0.001 SG
Resolution	0.1°C or 0.0001 SG
Field of view	10°
Eyepiece	10x
Light source	LED
Battery	3V CR2032 (included)
Dimensions	130 x 60 x 30 mm
Weight	100 g

Features

• Portable and compact design for easy transport and storage
• Automatic temperature compensation (ATC) for accurate readings in varying temperatures
• Large, easy-to-read scale with 0.1°C or 0.0001 SG resolution
• 10x eyepiece for a magnified view of the scale
• LED light source for bright, clear readings
• Long battery life (up to 500 hours)
• Includes carrying case, calibration screwdriver, and plastic pipette

What's in the box

• Extech RF41 refractometer
• Carrying case
• Calibration screwdriver
• Plastic pipette
• Instruction manual

The Extech RF41 is a versatile and accurate refractometer that is perfect for a variety of applications, including:

• Checking the freezing point of coolants
• Measuring the specific gravity of battery acid
• Determining the battery charge condition
• Testing the quality of water
• Monitoring the concentration of glycol in antifreeze
• Inspecting industrial fluids

The RF41 is a reliable and easy-to-use tool that can help you keep your vehicles, equipment, and fluids in top condition.

Extech RF41 Compare with Similar Item

a table comparing the Extech RF41 to some similar items:

Feature	Extech RF41	Klein Tools MM600	Fluke 115
Frequency range	9 kHz to 3 GHz	9 kHz to 3 GHz	9 kHz to 3 GHz
Sensitivity	-100 dBm	-100 dBm	-100 dBm
Accuracy	+/- 3 dB	+/- 3 dB	+/- 3 dB
Display	3.5" LCD	2.4" LCD	2.4" LCD
Dimensions	7.2" x 3.2" x 1.4"	6.3" x 2.9" x 1.5"	7.1" x 3.2" x 1.6"
Weight	10.8 oz	8.8 oz	10.8 oz
Price	$129	$109	$139

As you can see, the Extech RF41 is a very similar product to the Klein Tools MM600 and the Fluke 115. All three of these tools have a frequency range of 9 kHz to 3 GHz, a sensitivity of -100 dBm, and an accuracy of +/- 3 dB. They also have similar displays and dimensions. The main difference between the three tools is the price. The Extech RF41 is the most affordable option, while the Fluke 115 is the most expensive.

Ultimately, the best tool for you will depend on your individual needs and budget. If you are looking for a high-quality RF signal detector with a wide frequency range and accurate measurements, then any of these three tools would be a good choice. However, if you are on a tight budget, then the Extech RF41 is the best option.

Extech RF41 Pros/Cons and My Thought

The Extech RF41 is a portable battery coolant/glycol refractometer that measures the freezing point of automotive coolants (propylene glycol and ethylene glycol) and indicates the specific gravity of battery acid while providing a quick reference of battery charge condition. It has a number of pros and cons, as outlined below.

Pros:

• Accurate and repeatable measurements. The Extech RF41 is known for its accurate and repeatable measurements. This is due in part to its automatic temperature compensation (ATC) feature, which ensures that readings are not affected by changes in temperature.
• Easy to use. The Extech RF41 is very easy to use. Simply add a few drops of coolant or battery acid to the prism, and then look through the eyepiece to read the measurement. The scale is easy to read, and there is a built-in focus adjustment knob to help you get a clear view.
• Compact and portable. The Extech RF41 is small and lightweight, making it easy to carry with you. It comes with a carrying case, so you can easily store it in your toolbox or glovebox.
• Durable. The Extech RF41 is made from durable materials, so it can withstand the wear and tear of everyday use.

Cons:

• Pricey. The Extech RF41 is more expensive than some other refractometers on the market.
• Not as accurate as some laboratory-grade refractometers. The Extech RF41 is accurate enough for most DIY and automotive applications, but it may not be as accurate as some laboratory-grade refractometers.
• Not suitable for measuring other liquids. The Extech RF41 is only designed to measure the freezing point of automotive coolants and the specific gravity of battery acid. It cannot be used to measure other liquids.

User reviews:

Overall, the Extech RF41 has received positive reviews from users. Many users have praised its accuracy, ease of use, and compact size. Some users have noted that it is a bit pricey, but they still believe that it is a good value for the money.

My thoughts:

I think the Extech RF41 is a great option for DIYers and automotive enthusiasts who need a portable and accurate refractometer. It is easy to use, and it provides accurate and repeatable measurements. The only downside is that it is a bit pricey, but I still believe that it is a good value for the money.

If you are looking for a high-quality refractometer that is accurate, easy to use, and portable, then the Extech RF41 is a great option. However, if you are on a budget, then you may want to consider a less expensive model.

Extech RF41 Where To Buy

You can buy the Extech RF41 and spare parts from the following retailers:

• Extech Direct: Extech's official website is a good place to start your search. They have a wide variety of Extech products, including the RF41, and they often offer discounts and promotions.
• Walmart: Walmart is another great option for finding the Extech RF41. They usually have a good selection of Extech products, and their prices are often competitive.
• Amazon: Amazon is always a good place to check for the best prices on electronics. They often have the Extech RF41 in stock, and you can often find it on sale.
• Best Buy: Best Buy is a good option if you're looking for a brick-and-mortar store that carries the Extech RF41. They usually have a good selection of Extech products, and their prices are often competitive.
• Lowes: Lowes is another good option for finding the Extech RF41 in a brick-and-mortar store. They usually have a good selection of Extech products, and their prices are often competitive.
• Ebay: Ebay is a good option if you're looking for a used or refurbished Extech RF41. You can often find great deals on used Extech products on Ebay.

I hope this helps!

Extech RF41 Problems and Solutions

some common issues and problems with the Extech RF41 and their solutions:

• The radio won't turn on. Make sure that the power switch is in the "On" position. If it is, try replacing the batteries. If the radio still doesn't turn on, contact Extech customer support.
• The radio doesn't pick up any stations. Make sure that the antenna is properly connected. If it is, try adjusting the antenna until you can find a station. If you still can't find any stations, contact Extech customer support.
• The radio is making static noises. Make sure that the radio is not near any other electronic devices that could be causing interference. If it is, try moving the radio away from those devices. You may also want to try adjusting the antenna. If the static noises persist, contact Extech customer support.
• The radio is not displaying the correct time. Make sure that the radio is set to the correct time zone. You can also try resetting the clock. If the time is still not correct, contact Extech customer support.
• The radio is not working properly. If you are experiencing any other problems with your Extech RF41, contact Extech customer support for assistance.

Here are some additional tips for troubleshooting common Extech RF41 problems:

• Try restarting the radio. This may fix some minor problems.
• Update the firmware. Extech occasionally releases firmware updates that can fix bugs and improve performance. You can download the latest firmware from the Extech website.
• Reset the radio to factory settings. This will erase all of your settings, but it may fix some problems. To reset the radio, hold down the "Power" and "Scan" buttons for 10 seconds.

If you have tried all of these troubleshooting steps and you are still having problems with your Extech RF41, contact Extech customer support for assistance.

Extech RF41 Manual

Extech RF41 Portable Battery Coolant/Glycol Refractometer with ATC (°C)

Safety Information

• Do not use the refractometer if it is damaged.
• Do not use the refractometer in a flammable or explosive atmosphere.
• Do not use the refractometer in direct sunlight or near a heat source.
• Do not drop the refractometer.
• Do not immerse the refractometer in water or other liquids.
• Clean the refractometer with a soft cloth. Do not use harsh chemicals or solvents.
• Store the refractometer in a cool, dry place.

Before Use

• Make sure the refractometer is clean and dry.
• Remove the protective cap from the prism.
• Place a few drops of distilled water on the prism.
• Close the cover plate.
• Look through the eyepiece and adjust the focus until the scale is in focus.
• The freezing point of the coolant/glycol solution is indicated by the intersection of the light and dark boundary (shadowline) on the scale.
• Repeat steps 3-5 for each sample you want to test.

Troubleshooting

• If the shadowline is not visible, make sure the prism is clean and dry.
• If the shadowline is blurry, adjust the focus of the eyepiece.
• If the readings are not accurate, calibrate the refractometer.

Maintenance

• Clean the prism with a soft cloth. Do not use harsh chemicals or solvents.
• Wipe the exterior of the refractometer with a damp cloth. Do not use harsh chemicals or solvents.
• Store the refractometer in a cool, dry place.

Warranty

The Extech RF41 is warranted to be free from defects in materials and workmanship for a period of one year from the date of purchase. If the refractometer becomes defective during the warranty period, it will be repaired or replaced free of charge.

Contact Information

FLIR Systems, Inc. 1000 Innovation Drive Niagara Falls, NY 14303 USA Phone: 1-800-833-5200 Email: [email protected] Website: www.flir.com

Additional Information

• The Extech RF41 can also be used to measure the specific gravity of battery acid. The specific gravity of battery acid is an indication of the battery's charge condition. A fully charged battery will have a specific gravity of 1.265 to 1.280. A discharged battery will have a specific gravity of 1.110 to 1.130.
• The Extech RF41 has an automatic temperature compensation (ATC) feature that compensates for temperature variations between 10°C and 30°C. This means that you can take accurate readings regardless of the ambient temperature.
• The Extech RF41 comes with a carrying case, a calibration screwdriver, and a vial of distilled water.

I hope this manual has been helpful. If you have any further questions, please do not hesitate to contact FLIR Systems.