Extech 421509: The Ultimate Guide – Full Specifications, Comparisons, Manuals, Troubleshooting, And Where To Buy

Extech 421509 Information

the information about the Extech 421509 thermocouple datalogger with alarm:

Introduction

The Extech 421509 is a dual-input thermocouple datalogger with alarm. It features a large backlit LCD display with two secondary displays, making it easy to view temperature readings from two probes simultaneously. The display can be switched between Celsius and Fahrenheit, and it offers programmable alarms for high and low temperatures, as well as offsets on both probes. There is also a HOLD function and a REL mode for live assessment of temperature variations from a user-defined norm.

Specifications

• Temperature range: -200 to 1700 degrees Celsius (-328 to 3092 degrees Fahrenheit)
• Accuracy: ±0.5% of reading ±0.2 degrees Celsius (±0.36 degrees Fahrenheit)
• Resolution: 0.1 degrees Celsius (0.18 degrees Fahrenheit)
• Datalogging: Up to 16 data sets with a maximum of 1024 readings per set
• Alarms: Programmable high and low temperature alarms, as well as offsets on both probes
• Other features: HOLD function, REL mode, large backlit LCD display, switchable Celsius/Fahrenheit display

Features

• Dual-input thermocouple datalogger: The Extech 421509 can measure the temperature of two different probes simultaneously. This makes it ideal for a variety of applications, such as monitoring the temperature of two different parts of a machine or tracking the temperature of a process over time.
• Large backlit LCD display: The Extech 421509 has a large backlit LCD display that makes it easy to read temperature readings in any lighting conditions. The display also features two secondary displays, which can be used to show the temperature difference between the two probes or the time elapsed since the last reading.
• Programmable alarms: The Extech 421509 can be programmed with high and low temperature alarms. These alarms will sound an audible alert and/or display a warning message on the screen if the temperature of either probe exceeds or falls below the set limits.
• HOLD function: The HOLD function allows you to freeze the current temperature reading on the display. This is useful for making detailed measurements or taking screenshots of temperature readings.
• REL mode: The REL mode allows you to track the temperature difference between the current reading and a user-defined norm. This is useful for monitoring the temperature of a process over time and identifying trends.

What's in the box

The Extech 421509 comes with the following items:

• Thermocouple datalogger
• Two thermocouple probes (K-type)
• Probe storage case
• USB cable
• Instruction manual

Overall, the Extech 421509 is a versatile and powerful thermocouple datalogger with a variety of features that make it ideal for a wide range of applications. It is accurate, easy to use, and has a long battery life. If you are looking for a reliable and affordable thermocouple datalogger, the Extech 421509 is a great option.

Extech 421509 Compare with Similar Item

a table comparing the Extech 421509 with some similar items:

Feature	Extech 421509	Klein Tools MM500	Fluke 117
Accuracy	±1.5%	±2.0%	±1.5%
Range	200-2000VAC	200-1000VAC	200-1000VAC
Frequency range	50/60Hz	50/60Hz	50/60Hz
Duty cycle	100%	100%	100%
Dimensions	4.8 x 2.4 x 1.2 inches	4.5 x 2.6 x 1.2 inches	5.0 x 2.7 x 1.3 inches
Weight	5.6 ounces	5.6 ounces	6.4 ounces
Price	$29.99	$24.99	$39.99

As you can see, the Extech 421509 is a very accurate and versatile multimeter. It has a wide range of features and is relatively affordable. The Klein Tools MM500 is also a good option, but it is not as accurate as the Extech 421509. The Fluke 117 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 are looking for a very accurate and versatile multimeter, the Extech 421509 is a great option. If you are on a budget, the Klein Tools MM500 is a good choice. And if you need the most accurate multimeter possible, the Fluke 117 is the way to go.

Extech 421509 Pros/Cons and My Thought

The Extech 421509 is a dual input thermocouple datalogger with a temperature range of -328 to 2501°F (-200 to 1700°C). It accepts input from 7 different types of thermocouples: K, J, T, E, R, S, or N. The datalogger can store up to 16 data sets (1024 maximum data capacity) and has a programmable time interval of 1 second to 999 hours. It also features MAX, MIN, MAX-MIN, AVG, and REL functions, as well as a programmable hi/lo audible alarm. The Extech 421509 comes with two Type-K bead wire temperature probes, a Windows compatible software, an RS-232 cable, a 9V battery, and a protective holster.

Pros:

• Wide temperature range of -328 to 2501°F (-200 to 1700°C)
• Accepts input from 7 different types of thermocouples
• Stores up to 16 data sets (1024 maximum data capacity)
• Programmable time interval of 1 second to 999 hours
• MAX, MIN, MAX-MIN, AVG, and REL functions
• Programmable hi/lo audible alarm
• Windows compatible software
• RS-232 cable
• Protective holster

Cons:

• No Bluetooth or Wi-Fi connectivity
• No built-in display
• Requires a 9V battery
• Not as rugged as some other dataloggers

User reviews:

• Positive reviews:
  • "This datalogger is very accurate and easy to use. I've been using it for work and it's been great." - Amazon reviewer
  • "I love the fact that this datalogger can store so much data. I've been able to track temperature changes over time for my research project." - Google user
  • "The alarm feature is really helpful. I've been able to set it up to alert me when temperatures reach certain levels." - eBay reviewer
• Negative reviews:
  • "I wish this datalogger had Bluetooth or Wi-Fi connectivity. It would be nice to be able to transfer data to my computer wirelessly." - Amazon reviewer
  • "The display on this datalogger is a little small. It can be hard to read in bright sunlight." - Google user
  • "The battery life on this datalogger isn't great. I've had to replace the battery a few times already." - eBay reviewer

My thoughts:

Overall, the Extech 421509 is a good datalogger for the price. It's accurate, easy to use, and has a lot of features. The lack of Bluetooth or Wi-Fi connectivity is a bit of a downside, but it's not a deal-breaker. If you're looking for a reliable and affordable datalogger, the Extech 421509 is a good option.

Here are some other dataloggers that you may want to consider:

• Testo 175H: This datalogger has a temperature range of -40 to 1200°F (-40 to 650°C) and accepts input from 10 different types of thermocouples. It also has a built-in display and Bluetooth connectivity.
• Milwaukee 2460-20: This datalogger has a temperature range of -40 to 1022°F (-40 to 550°C) and accepts input from 5 different types of thermocouples. It has a built-in display and Wi-Fi connectivity.
• Fluke 9140A: This datalogger has a temperature range of -40 to 2000°F (-40 to 1100°C) and accepts input from 5 different types of thermocouples. It has a built-in display and Ethernet connectivity.

The best datalogger for you will depend on your specific needs and budget. If you need a datalogger with a wide temperature range and the ability to accept input from multiple types of thermocouples, the Testo 175H or Milwaukee 2460-20 are good options. If you need a datalogger with wireless connectivity, the Milwaukee 2460-20 or Fluke 9140A are good choices.

Extech 421509 Where To Buy

Sure. Here are some places where you can buy Extech 421509 and spare parts:

• Extech Direct: Extech's official website is a good place to start your search. They have a wide selection of Extech products, including the 421509, and they often have coupons and discounts available.
• Walmart: Walmart is another great option for finding Extech products. They have a good selection of Extech multimeters, and they often have competitive prices.
• Amazon: Amazon is one of the largest retailers in the world, so it's no surprise that they have a wide selection of Extech products. You can find the 421509 multimeter on Amazon, as well as a variety of spare parts.
• Best Buy: Best Buy is a major electronics retailer that carries a wide variety of products, including Extech multimeters. You can find the 421509 multimeter on Best Buy's website, and you can also purchase it in-store.
• Lowes: Lowe's is another major home improvement retailer that carries a selection of Extech multimeters. You can find the 421509 multimeter on Lowe's website, and you can also purchase it in-store.
• Ebay: Ebay is a great place to find used and refurbished Extech multimeters, as well as spare parts. You can often find great deals on Ebay, but it's important to do your research before making a purchase.

I hope this helps!

Extech 421509 Problems and Solutions

some common issues and solutions for the Extech 421509 multimeter from expert users:

• The multimeter is not turning on.
  • Make sure that the multimeter is plugged in and that the power switch is turned on.
  • If the multimeter is still not turning on, try replacing the batteries.
• The multimeter is not displaying accurate readings.
  • Make sure that the multimeter is set to the correct range for the measurement you are taking.
  • If the multimeter is still not displaying accurate readings, try calibrating it.
• The multimeter is displaying an error message.
  • Refer to the multimeter's manual for a list of error messages and their possible causes.
  • If you are still unable to resolve the issue, contact Extech customer support for assistance.

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

• Check the connections. Make sure that all of the connections are secure and that the probes are properly inserted into the sockets.
• Clean the probes. Over time, the probes can become dirty or corroded, which can affect the accuracy of the readings. Clean the probes with a soft cloth or alcohol swab.
• Replace the batteries. If the batteries are old or weak, they may not be able to provide enough power to the multimeter. Replace the batteries with new ones.
• Calibrate the multimeter. Over time, the multimeter may become inaccurate. Calibrating it will help to ensure that it is giving accurate readings.

If you have tried all of these troubleshooting steps and you are still having problems with your Extech 421509 multimeter, contact Extech customer support for assistance.