Best Circuit Testers of 2025

"When I purchased my home, the inspector noted that my breaker box wasn't properly labeled. After trying a less expensive product that didn't work, I opted for this one because I saw experts recommending it online. It worked perfectly right out of the box! I quickly identified all my outlets, lights, and breakers. I highly recommend this tool for anyone needing to locate breakers before starting any electrical projects—it's ideal for both professionals and DIY enthusiasts."

"I found this meter to be fantastic, just as I anticipated. Klein produces quality tools. Following the directions made everything straightforward. I particularly appreciate the alligator clips for checking switches and the light bulb socket adapter that came with it. This product comes highly recommended."

"I grew tired of the poor labeling in my circuit breaker box from my home builders. Many outlets were unlabeled, so I wanted to find out which ones were on the same breaker. This tool worked exceptionally well, and now I have a clear list of what is connected where. The construction feels solid. I look forward to using the light bulb attachment next!"

“This circuit breaker finder has been a game changer for me. It worked like a charm, quickly identifying the correct breaker and saving me a lot of time.”

“I found this tool to be incredibly valuable for my electrical troubleshooting. It made identifying circuits much easier, especially when the labels had faded.”

“After buying this tool, I can confidently say it's one of the best investments I've made. It has worked on every receptacle and light I've needed to fix.”

"I’ve been testing various solar equipment and needed an affordable tool for checking inverters. This tester is super simple to use—just plug it in, and it gives readings or shows errors. It helped me spot a unit that was throwing errors, which I wouldn’t have noticed otherwise. After testing, I found a few minor issues around the house. When was the last time you bought an inexpensive tool that improved your safety? Now I just need to fix those issues..."

"As a home inspector, I find this tool excellent for clearly identifying issues for my customers. However, it can be a bit slow to turn on, and if I trip a GFCI, it takes a few seconds to reset before I can check the next outlet. When testing 100 outlets, this added delay can slow me down. Despite that, I still carry this along with a basic tester for its clear image readout when I need to explain results to clients."

"I’m an electrical engineer, and I regularly do wiring and repairs for myself and others. While I have a full set of meters, this outlet tester is a huge time-saver and incredibly handy. Even those who aren't well-versed in electricity can use it easily. I have others test the outlets, marking which ones fail, and I handle the repairs. This tester is extremely rugged and has been used for hundreds of tests without any issues. I can’t recommend it enough!"

"I used these tools to replace a light switch and GFCI outlet, and they were invaluable for verifying the correct breaker was flipped. Safety first! I watched several YouTube videos to guide me."

"Initially, I bought this for home use, but as a shipyard electrician, I find it essential for confirming that equipment is properly isolated before work. A great validation tool!"

"During my DIY kitchen remodel, I replaced all the outlets and switches. These tools gave me peace of mind by confirming that the power was off and that I installed everything correctly. I wish I had these sooner!"

"I bought this item to test my outlets, and I was pleasantly surprised when each one passed. The panel is easy to read and understand. I’d recommend it for electricians or anyone who regularly tests outlets."

"I really wish I had purchased this tester sooner. It's just a handy tool to have around for any electrical work I do."

"The tester works great! However, I found it cheaper at Home Depot on clearance, so I returned my Amazon purchase. But overall, it accurately detects common wiring issues in GFCI and standard outlets, making it a must-have for troubleshooting."

“I bought this to replace my old Amprobe, which I accidentally left on a jobsite. This circuit analyzer is smaller and easier to use, displaying three loads with just one button. The display is very clear, and so far, it hasn't cut off due to overheating, even with frequent use.”

“This tester is the only one in the US that can test every AFCI receptacle and breaker. While I’ve seen some reports of it not tripping certain breakers, I didn’t experience that. I did find the pigtail plug tends to slide out slightly, which can be misleading. The hold function is somewhat useful, but I wish there was a way to disable it.”

“I used this tester on all my house outlets and found a reversed wiring issue, making it very worthwhile. It’s compact enough to reach most outlets, though the cord is short. I often need an extension cord for easier access to the display. The build quality is solid, but it turns off a bit too quickly, which can be annoying.”

“I've found this tool to be one of the best purchases I've made in a long time. The ability to trace powered and unpowered circuits is fantastic. I used it to locate a breaker and find a broken ground wire. It really excelled at tracing a buried wire through the yard, saving me from hiring a private locate service.”

“I bought this to replace my older toner. The Klein model easily differentiates wires in a bundle, making it simpler to identify which wire I need. The included molded case is a nice touch, and I appreciate the option to swap out the alligator clip for different plug styles.”

“This tool is definitely a must-have for both professionals and DIYers. It’s easy to use and offers great value compared to other brands.”

"I wanted to be honest because I rely on reviews. After years of frustration, I found this tester on Amazon. It quickly tells me if power is coming in and diagnoses issues if it's not. I believe every home should have one—definitely worth the price!"

"I’m not an electrician, but I needed this tool to check outlets for sensitive electronics. It’s important to know the wiring is right before plugging in. When it said OK, I confidently used the outlets, and so far, no failures!"

"This gadget is incredible! It's like having a superpower for checking outlets. The visuals are super easy to understand, and it gives quick results. Plus, it arrived faster than expected, and the price is a total steal!"

"I found electrical work easier by identifying the right breaker quickly with this tool. It beeps when I hit the correct breaker, and I love that it can also function as a non-contact tester. I've always trusted Fluke, and this product lives up to my expectations."

"This breaker finder worked exactly as expected. I was able to locate the breaker connected to my socket tester in just a few minutes. The forward-facing LED light and color-flashing tip are useful features. Just a heads up, the BK129 and ST120 are quite similar, so be careful!"

"I've used it a few times, and it does what it's supposed to do. The accuracy is impressive, and I think it's a great Fluke device to keep in my kit without breaking the bank."