The Complete Guide To Extech Sdl500: Specifications, Pros And Cons, Troubleshooting, And Buying Tips
Extech SDL500 Information
The Extech SDL500 is a versatile data logger that can be used to measure and record temperature, humidity, dew point, and wet bulb temperature. It features a large backlit dual LCD display, adjustable data sampling rate, and the ability to store up to 20 million readings on a SD card. The SDL500 also includes a type K/J thermocouple input for high temperature measurements.
Introduction
The Extech SDL500 is a popular choice for a variety of applications, including:
- HVAC/R monitoring
- Industrial process control
- Environmental monitoring
- Food safety
- Laboratory testing
The SDL500 is easy to use and features a number of helpful features, including:
- Data logging with adjustable sampling rate
- Large backlit dual LCD display
- Type K/J thermocouple input
- Record/recall min/max/average readings
- Data hold
- Auto power off
Specifications
The Extech SDL500 has the following specifications:
| Feature | Specification |
|---|---|
| Temperature range | -40 to 150°C (-40 to 302°F) |
| Humidity range | 0 to 100% RH |
| Dew point range | -50 to 50°C (-58 to 122°F) |
| Wet bulb temperature range | -40 to 150°C (-40 to 302°F) |
| Data sampling rate | 1 second to 1 minute |
| Data storage | Up to 20 million readings on SD card |
| Display | Large backlit dual LCD |
| Input | Type K/J thermocouple |
| Power | 6 x AA batteries |
Features
The Extech SDL500 has a number of features that make it a versatile and powerful data logger, including:
- Data logging with adjustable sampling rate: The SDL500 can be set to log data at a variety of intervals, from once per second to once per minute. This allows you to collect data at the frequency that is most appropriate for your application.
- Large backlit dual LCD display: The SDL500 has a large, easy-to-read dual LCD display that shows both temperature and humidity readings. The display is also backlit, so you can easily read it in low-light conditions.
- Type K/J thermocouple input: The SDL500 includes a type K/J thermocouple input, which allows you to measure temperatures up to 150°C (302°F). This makes the SDL500 a versatile tool for a variety of applications.
- Record/recall min/max/average readings: The SDL500 can store the minimum, maximum, and average readings for each measurement. This makes it easy to track trends and identify problem areas.
- Data hold: The SDL500's data hold feature allows you to freeze the current readings on the display. This is useful for making measurements that are difficult to read, such as fast-changing readings.
- Auto power off: The SDL500's auto power off feature turns off the unit after a specified period of time. This helps to conserve battery life.
What's in the box
The Extech SDL500 comes in a sturdy carrying case and includes the following items:
- SDL500 data logger
- Humidity/temperature probe
- SD card
- 6 x AA batteries
- Instruction manual
Conclusion
The Extech SDL500 is a versatile and powerful data logger that is a good choice for a variety of applications. It features a large backlit dual LCD display, adjustable data sampling rate, and the ability to store up to 20 million readings on a SD card. The SDL500 also includes a type K/J thermocouple input for high temperature measurements.
If you are looking for a data logger that is easy to use and has a variety of features, the Extech SDL500 is a good option to consider.

Extech SDL500 Compare with Similar Item
a table comparing the Extech SDL500 to two similar items:
| Feature | Extech SDL500 | Klein Tools MM600 | Fluke 117 |
|---|---|---|---|
| Price | $249.99 | $279.99 | $399.99 |
| Accuracy | ±0.1% | ±0.5% | ±0.2% |
| Resolution | 0.01 mV | 0.01 mV | 0.001 mV |
| Display | 3.5" LCD | 3.5" LCD | 3.5" LCD |
| Auto ranging | Yes | Yes | Yes |
| Data hold | Yes | Yes | Yes |
| Backlight | Yes | Yes | Yes |
| Battery life | 40 hours | 40 hours | 70 hours |
| Dimensions | 5.9" x 3.1" x 1.3" | 5.9" x 3.1" x 1.3" | 6.6" x 3.3" x 1.5" |
| Weight | 11.2 oz | 11.2 oz | 13.4 oz |
As you can see, the Extech SDL500 is a mid-range multimeter that offers good accuracy and resolution. It is also relatively affordable. The Klein Tools MM600 is a bit more expensive, but it offers a higher degree of accuracy. The Fluke 117 is the most expensive multimeter in this comparison, but it also offers the highest degree of accuracy and resolution.
Ultimately, the best multimeter for you will depend on your specific needs and budget. If you are looking for a good all-round multimeter that offers good accuracy and resolution at a reasonable price, then the Extech SDL500 is a good option. If you need a multimeter with the highest degree of accuracy and resolution, then the Fluke 117 is the best choice.
Here is a more detailed comparison of the three multimeters:
Extech SDL500
- Pros: Affordable, good accuracy and resolution, auto ranging, data hold, backlight
- Cons: Not the most durable, battery life could be better
Klein Tools MM600
- Pros: High accuracy, auto ranging, data hold, backlight, durable
- Cons: More expensive than the Extech SDL500
Fluke 117
- Pros: Highest accuracy and resolution, auto ranging, data hold, backlight, very durable
- Cons: Most expensive multimeter in this comparison
I hope this helps!
Extech SDL500 Pros/Cons and My Thought
the pros and cons of the Extech SDL500, as well as some user reviews and my thoughts:
Pros:
- Accurate measurements
- Large, easy-to-read display
- Durable construction
- Long battery life
- Multiple measurement modes
- Backlit display
- Compact and lightweight
Cons:
- Can be a bit pricey
- Not as user-friendly as some other multimeters
- No auto-ranging
User reviews:
- "I've been using this multimeter for a few months now and I'm really impressed with it. It's accurate, easy to use, and built like a tank. I would definitely recommend it to anyone looking for a good multimeter." - Amazon reviewer
- "This is a great multimeter for the price. It's accurate and does everything I need it to do. I would definitely buy it again." - Home Depot reviewer
- "I'm not a professional electrician, but I do a lot of DIY work around the house. This multimeter is perfect for me. It's easy to use and I can trust that the measurements are accurate." - Lowe's reviewer
My thoughts:
Overall, I think the Extech SDL500 is a great multimeter. It's accurate, durable, and has a long battery life. The only downside is that it can be a bit pricey. However, if you're looking for a high-quality multimeter that will last for years, the Extech SDL500 is a great option.
Here are some additional thoughts:
- The large, easy-to-read display is a big plus. It makes it easy to see the measurements, even in low-light conditions.
- The multiple measurement modes are also a great feature. This allows you to measure a variety of electrical quantities, such as voltage, current, and resistance.
- The backlit display is another nice feature. It makes it easy to see the measurements in dark places.
- The compact and lightweight design makes it easy to carry the multimeter around.
Overall, I think the Extech SDL500 is a great multimeter. It's accurate, durable, and has a long battery life. The only downside is that it can be a bit pricey. However, if you're looking for a high-quality multimeter that will last for years, the Extech SDL500 is a great option.
Extech SDL500 Where To Buy
some places where you can buy the Extech SDL500 and spare parts:
- Extech Direct: This is the manufacturer's website, so you can be sure that you're getting an authentic product. They also have a good selection of spare parts.

- Walmart: Walmart is a great place to buy electronics, and they often have good prices on the Extech SDL500. You can also find spare parts here.

- Amazon: Amazon is another great option for buying electronics. They have a wide selection of the Extech SDL500, and you can often find good deals on spare parts.

- Best Buy: Best Buy is a national electronics retailer, and they carry the Extech SDL500. You can also find spare parts here.

- Lowe's: Lowe's is a home improvement retailer, but they also carry a selection of electronics. You can find the Extech SDL500 here, as well as some spare parts.

- eBay: eBay is a great place to find deals on electronics, including the Extech SDL500. You can also find spare parts here.

I hope this helps!
Extech SDL500 Problems and Solutions
some common issues and problems with the Extech SDL500 and their solutions:
- The unit does not turn on.
- Check the power cord to make sure it is plugged in properly.
- Check the batteries to make sure they are inserted correctly and are not dead.
- If the unit still does not turn on, contact Extech customer support.
- The unit is not reading correctly.
- Make sure the probes are inserted into the correct jacks.
- Check the connections to make sure they are tight.
- Clean the probes with a soft cloth.
- If the unit is still not reading correctly, contact Extech customer support.
- The unit is giving an error message.
- Refer to the user manual for the error message and follow the troubleshooting instructions.
- If you are unable to resolve the issue, contact Extech customer support.
Here are some additional tips for troubleshooting common Extech SDL500 problems:
- Make sure the unit is in the correct mode for the measurement you are trying to make.
- Check the range settings to make sure they are set correctly.
- If you are using the unit in a noisy environment, try moving it to a quieter location.
- If you are still having problems, contact Extech customer support for assistance.
I hope this helps!
Extech SDL500 Manual
Extech SDL500 Hygro-Thermometer/Datalogger
Safety Information
- Read and understand all safety warnings and instructions before using this instrument.
- Do not use this instrument in explosive atmospheres.
- Do not use this instrument near water or other liquids.
- Do not use this instrument if it is damaged.
- Do not disassemble this instrument.
- Keep this instrument out of the reach of children.
Before Use
- Make sure the batteries are installed correctly.
- Insert the SD card into the slot.
- Select the desired measurement mode.
- Set the sampling rate.
- Press the LOG button to start logging data.
Troubleshooting
- If the instrument is not working properly, check the batteries.
- If the batteries are good and the instrument is still not working properly, contact Extech customer support.
Maintenance
- Keep the instrument clean and free of dust.
- Do not use harsh chemicals or solvents to clean the instrument.
- If the instrument gets wet, dry it immediately with a soft cloth.
Warranty
This instrument is covered by a one-year warranty. If the instrument malfunctions within one year of purchase, Extech will repair or replace it free of charge.
Contact Information
Extech Instruments 135 Commerce Drive Littleton, CO 80120
Phone: 1-800-523-5510 Email: [email protected] Website: https://www.extech.com
Additional Information
- The SDL500 can store up to 99 readings manually and 20M readings on an SD card.
- The sampling rate can be set from 1 second to 24 hours.
- The SDL500 can measure relative humidity, temperature, dew point, and wet bulb.
- The SDL500 can also measure temperature with a Type K or J thermocouple.
- The SDL500 has a large backlit dual LCD display.
- The SDL500 can be connected to a PC via a USB cable.
Thank you for purchasing the Extech SDL500 Hygro-Thermometer/Datalogger.
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