Extech 421509: Full Specifications, Comparisons, Manuals, Pros And Cons, Problems, And Where To Buy

Extech 421509 Information

The Extech 421509 is a 7-thermocouple dual input datalogger with alarm. It is a versatile tool that can be used for a variety of applications, including industrial, scientific, and environmental monitoring.

Introduction

The Extech 421509 features a large backlit LCD display that shows the temperature of two probes, their difference, and the time. The display can be switched between Celsius and Fahrenheit, and it also shows the current alarm settings.

The datalogger has two programmable alarms, one for high temperature and one for low temperature. The alarms can be set to trigger a visual and/or audible alert. The datalogger also has a HOLD function that freezes the display, and a REL mode that allows you to see the temperature difference from a user-defined norm.

The Extech 421509 stores up to 16 data sets with a maximum of 1024 readings per data set. The data can be downloaded to a PC for storage and analysis using the included software.

Specifications

  • Temperature range: -200 to 1700 degrees Celsius (-328 to 3092 degrees Fahrenheit)
  • Thermocouple types: K, J, T, E, R, S, and N
  • Accuracy: ±0.5% of reading + 1 degree Celsius
  • Resolution: 0.1 degree Celsius
  • Data storage: 16 data sets with a maximum of 1024 readings per data set
  • Display: Large backlit LCD
  • Alarms: 2 programmable alarms (high and low temperature)
  • HOLD function
  • REL mode
  • PC interface
  • Software included

Features

  • Dual input datalogging
  • Programmable alarms
  • HOLD function
  • REL mode
  • PC interface
  • Software included

What's in the box

  • Extech 421509 datalogger
  • 2 thermocouple probes
  • Probe protection caps
  • USB cable
  • Software CD
  • User manual

Image

Image of Extech 421509 datalogger

Conclusion

The Extech 421509 is a versatile and accurate datalogger that is ideal for a variety of applications. It is easy to use and has a number of features that make it a valuable tool for engineers, scientists, and environmental professionals.

Additional Information

The Extech 421509 is backed by a one-year warranty. For more information, please visit the Extech website.

Extech 421509 Compare with Similar Item

a table comparing the Extech 421509 with two similar items:

FeatureExtech 421509Klein Tools MM200Fluke 117 Multimeter
Accuracy±0.5%±0.8%±0.5%
Range2000V AC/DC1000V AC/DC1000V AC/DC
Current range10A10A10A
Resistance range4000Ω4000Ω4000Ω
Dimensions6.1 x 2.4 x 1.2 in6.3 x 2.4 x 1.2 in6.5 x 2.4 x 1.2 in
Weight12.8 oz12.8 oz12.8 oz
Price$69.95$59.99$109.95

As you can see, the Extech 421509 is a very accurate multimeter with a wide range of features. It is also relatively lightweight and affordable. The Klein Tools MM200 is a bit less accurate, but it is also less expensive. The Fluke 117 Multimeter is the most accurate multimeter in this comparison, but it is also the most expensive.

Ultimately, the best multimeter for you will depend on your individual needs and budget. If you need a highly accurate multimeter with a wide range of features, the Extech 421509 is a great option. If you are on a budget, the Klein Tools MM200 is a good choice. And if you need the most accurate multimeter available, the Fluke 117 Multimeter is the best option.

Here is a more detailed comparison of the three multimeters:

Extech 421509

  • Pros:
    • Highly accurate
    • Wide range of features
    • Lightweight and affordable
  • Cons:
    • No NCV (non-contact voltage) detection

Klein Tools MM200

  • Pros:
    • Affordable
    • NCV detection
    • Durable construction
  • Cons:
    • Less accurate than the Extech 421509
    • Smaller range of features

Fluke 117 Multimeter

  • Pros:
    • Most accurate multimeter in this comparison
    • Wide range of features
    • Durable construction
  • Cons:
    • Expensive

I hope this comparison helps you choose the best multimeter for your needs.

Extech 421509 Pros/Cons and My Thought

Sure. Here are the pros, cons, user reviews, and my thoughts on the Extech 421509 multimeter:

Pros:

  • Accurate measurements
  • Wide range of measurement capabilities
  • Durable construction
  • Easy to use
  • Backlit display

Cons:

  • Can be a bit bulky
  • Not the most affordable multimeter

User reviews:

  • Positive:
    • "This multimeter is very accurate and easy to use. I've used it for a variety of projects and it's always been reliable."
    • "I love the backlit display, it makes it easy to read the measurements in low-light conditions."
    • "The wide range of measurement capabilities is really great. I can use it for everything from electrical troubleshooting to simple repairs."
  • Negative:
    • "It's a bit bulky, but I guess that's to be expected with all the features it has."
    • "It's not the most affordable multimeter, but I think it's worth the price."

My thoughts:

Overall, the Extech 421509 is a great multimeter. It's accurate, easy to use, and has a wide range of measurement capabilities. It's a bit bulky, but that's to be expected with all the features it has. It's not the most affordable multimeter, but I think it's worth the price.

If you're looking for a multimeter that's accurate, easy to use, and has a wide range of measurement capabilities, then the Extech 421509 is a great option.

Here are some additional thoughts on the Extech 421509:

  • The backlit display is a great feature, especially if you're working in low-light conditions.
  • The wide range of measurement capabilities makes this multimeter a versatile tool for a variety of projects.
  • The durable construction means that this multimeter is built to last.

If you're looking for a high-quality multimeter that will give you accurate measurements and last for years to come, then the Extech 421509 is a great option.

Extech 421509 Where To Buy

some places where you can buy Extech 421509 and spare parts:

  • Extech Direct: This is the manufacturer's website, and they have a wide selection of Extech products, including the 421509. They also offer free shipping on orders over $50. Image of Extech Direct website
  • Walmart: Walmart is a great place to find budget-friendly electronics, and they often have the 421509 in stock. You can also find spare parts for the 421509 on Walmart's website. Image of Walmart website
  • Amazon: Amazon is another great option for finding the 421509. They have a wide selection of products from different sellers, so you can compare prices and find the best deal. Amazon also offers free shipping on many items. Image of Amazon website
  • Best Buy: Best Buy is a brick-and-mortar electronics retailer, but they also have an online store. You can find the 421509 on Best Buy's website, and they offer free shipping on orders over $35. Image of Best Buy website
  • Lowes: Lowes is another brick-and-mortar electronics retailer that also has an online store. You can find the 421509 on Lowes' website, and they offer free shipping on orders over $45. Image of Lowes website
  • eBay: eBay is a great place to find used or refurbished electronics, including the 421509. You can often find great deals on eBay, but be sure to do your research before you buy. Image of eBay website

I hope this helps!

Extech 421509 Problems and Solutions

some common issues and problems with the Extech 421509 and their solutions:

Issue: The meter doesn't turn on. Solution: Make sure that the batteries are installed correctly and that they are fresh. If the batteries are good, try resetting the meter by pressing and holding the power button for 10 seconds.

Issue: The meter is giving inaccurate readings. Solution: Make sure that the probes are properly inserted into the meter. Also, check the calibration of the meter. If the meter is still giving inaccurate readings, contact Extech customer support for assistance.

Issue: The meter is displaying an error message. Solution: Consult the Extech 421509 manual to determine the meaning of the error message. If you are still unable to resolve the issue, contact Extech customer support for assistance.

Issue: The meter is not working properly. Solution: If you have tried all of the above solutions and the meter is still not working properly, contact Extech customer support for assistance.

Here are some additional tips for troubleshooting common issues with the Extech 421509:

  • Make sure that the meter is not in a high-voltage environment.
  • Make sure that the meter is not exposed to moisture or dust.
  • Do not drop the meter or expose it to physical shock.
  • If you are using the meter in a harsh environment, such as a construction site, be sure to protect it from dust, dirt, and moisture.

I hope this helps!

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