Electricians and DIY enthusiasts often rely on circuit tracers to make their jobs faster, safer, and more precise. Klein Tools offers two standout options in this category: the ET300 and the ET310. Both are designed to simplify the task of identifying breakers, but each model brings its own strengths that appeal to different users.
The ET300 delivers reliable performance at an affordable price, making it a popular choice for those who want straightforward functionality without unnecessary extras. It excels at identifying breakers quickly, which saves time during troubleshooting and routine electrical work.
On the other hand, the ET310 offers advanced features that extend beyond breaker tracing. Its ability to detect live wires behind walls gives it an edge for professionals who often work in complex environments where versatility is key. Understanding the differences between these two tools helps users invest in the right model for their specific needs.
Some may value simplicity and cost-effectiveness, while others prefer the added capabilities of a more advanced device. Comparing the ET300 and ET310 side by side highlights the key distinctions, making it easier to decide which circuit tracer will deliver the most value for your work.
Klein Tools ET300 vs ET310 Breaker Finder
Both the ET300 and ET310 are popular circuit breaker finders from Klein Tools. They help electricians, DIYers, and homeowners find the correct breaker for an outlet or fixture. While both models serve the same purpose, they have different strengths. Below, we’ll go through each product in detail and then compare them side by side.
Klein Tools ET300 Circuit Breaker Finder
Product Details
The ET300 can find the matching circuit breaker for any 120V outlet quickly and with good accuracy. A flashing arrow makes identification simple.
The transmitter is strong and can reach up to 1000 feet. It works on circuits between 90 to 120 volts. A microprocessor inside ensures better accuracy. To save battery, it has an auto power-off function. An optional accessory kit (Cat. No. 69411) adds a light socket adapter and an alligator clip assembly.
Features
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Fast breaker identification for 120V outlets
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Flashing arrow for clear results
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Strong transmitter with up to 1000 feet range
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Works on 90-120V operation
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Microprocessor for reliable performance
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Auto power-off to save battery
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Optional accessory kit for more connection types
What is the good?
The ET300 has a long range, which makes it useful in larger buildings. The flashing arrow indicator is easy to read, so mistakes are less likely. The microprocessor also improves reliability. The optional accessory kit gives extra flexibility for different testing situations.
What is the bad?
It does not come with the accessory kit, so that must be purchased separately. There is no built-in GFCI tester, which limits its use for testing safety devices. The receiver does not give sound feedback, only visual, which may be less convenient in noisy places.
Overall Opinion
The ET300 is simple, accurate, and strong enough for most jobs. It works well for basic breaker finding and has a solid range. It is a reliable tool, but some users may want extra functions that this model does not include.
Klein Tools ET310 AC Circuit Breaker Finder
Product Details
The ET310 is designed for quick and precise breaker finding. It uses a two-part system with a transmitter and receiver. The receiver gives both sound and light signals when the correct breaker is found. It works with 90 to 120V AC circuits. The transmitter also includes a built-in GFCI tester, which helps check wiring and test GFCI outlets. The transmitter can be docked into the receiver for easy storage. It uses a three-pin plug, making it simple to connect to standard grounded outlets.
Features
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Accurate circuit breaker identification
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Transmitter and receiver system
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Visual and audible signals
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Works on 90-120V AC circuits
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Built-in GFCI tester
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Docking design for compact storage
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Three-pin plug for easy connection
What is the good?
The ET310 provides both sound and visual feedback, making it easier to use. The built-in GFCI tester adds extra safety testing without another tool. The compact docking design keeps the transmitter and receiver together, reducing the chance of losing parts. It connects easily to grounded outlets with its three-pin plug.
What is the bad?
The ET310 has a smaller signal range compared to the ET300, which can be a limitation in larger buildings. It only works with grounded outlets, so extra adapters may be needed in some cases.
Overall Opinion
The ET310 is a practical choice with more built-in features than the ET300. It suits most household and professional jobs where GFCI testing is useful. Its compact design and extra feedback options make it easy to use, though it may not cover as much distance as the ET300.
Detailed Comparison Klein Tools ET300 vs ET310
The ET300 focuses on long-range detection, while the ET310 provides more user-friendly features. Both work on 90-120V circuits, but the ET300 has a signal range of up to 1000 feet, making it better for larger properties. The ET310 has the advantage of both sound and light signals, while the ET300 mainly uses visual indicators.
Another big difference is the built-in GFCI tester in the ET310, which adds an extra layer of safety testing. For storage, the ET310 has a docking system, while the ET300 does not. Overall, the ET300 is stronger in range, while the ET310 is better in usability and extra features.
FAQs
Q1: Do both models work on 240V circuits?
No, both are designed for 90-120V circuits only.
Q2: Can the ET300 test GFCI outlets?
No, only the ET310 has a built-in GFCI tester.
Q3: Which is better for larger buildings?
The ET300, since it has a longer transmitter range.
Q4: Which model is easier for beginners?
The ET310, because it has sound and light signals plus a GFCI tester.
Q5: Do they need batteries?
Yes, both models require batteries for operation.
Conclusion
Both Klein Tools ET300 and ET310 are reliable circuit breaker finders. The ET300 is the right choice if you need strong range and basic breaker finding. The ET310 is better if you want extra features like sound signals, a GFCI tester, and compact storage. The decision depends on whether you prefer more distance or more functions.
