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🔌 Stay Wired Right: The Classic Socket Tester Every Pro Swears By!
The Martindale CP501 Classic Check Plug is a compact, robust 240V socket tester featuring three bright LEDs that instantly identify 28 common wiring faults. Trusted by over 2 million users, it ensures quick, reliable safety checks with a sculpted grip design for easy handling and minimal earth leakage, making it essential for electricians and homeowners seeking fast, fail-safe socket verification.










| Asin | B003OHDFSA |
| Best Sellers Rank | 43,693 in DIY & Tools (See Top 100 in DIY & Tools) 38 in Circuit Testers |
| Brand | Martindale |
| Colour | Blue |
| Customer Reviews | 4.7 4.7 out of 5 stars (703) 4.7 out of 5 stars |
| Global Trade Identification Number | 05036162183003 |
| Included Components | 1 x Martindale Socket Tester |
| Item Dimensions | 6.5 x 6.5 x 4.7 centimetres |
| Item Type Name | Socket Tester |
| Item Weight | 0.06 Kilograms |
| Manufacturer | Martindale Electric Co Ltd |
| Manufacturer Part Number | CP501 |
| Maximum Operating Voltage | 240 Volts |
| Measurement Type | Electrical |
| Minimum Operating Voltage | 240 Volts |
| Model Number | CP501 |
| Number Of Items | 1 |
| Number Of Packs | 1 |
| Power Source | Electric |
| Product Warranty | 2 year |
| Style Name | Classic |
| Unit Count | 1.0 count |
User
Good product. Recommend.
Bought a few of these now.
User
Simple and Reliable Socket Safety Checker
The CP501 Classic Check socket tester is a handy tool for quickly checking the safety of your 240V sockets. It’s very straightforward to use—just plug it in and the indicator lights clearly show whether the wiring is correct or if there’s a fault. This makes it ideal for both DIY users and anyone wanting extra peace of mind at home.The compact design is easy to carry around, so you can test multiple sockets without hassle. The light indicators are bright and easy to understand once you’ve checked the guide. It feels solid enough for regular use and doesn’t require any setup or batteries.It’s especially useful for identifying common wiring issues quickly, though it’s more of a basic diagnostic tool rather than a full electrical tester. Overall, a simple, effective, and affordable device for checking socket safety.
User
Recommend
Great value, packaged well. Does the job.
User
Easy to Use
Arrived quickly. The device works perfectly, no issues. I didn't even have to read the instructions...but I did anyway. Cheers.
User
Socket testing.
Great tool to test socket’s with ease.Saves taking screws out to check the wiring
User
Brilliant plug
This is a great item. The previous one from a different company didn’t work
User
Handy tool
Handy to have in your tool box.
User
Does all you need it to.
Perfect for work as an electrician. Always bemuses me though the price for the sake of a buzzer compared to those without. Only reason it’s not 5 stars.
Trustpilot
1 month ago
2 months ago