--- product_id: 52874555 title: "Martindale CP501 Classic Check Plug 240V Socket Tester, Blue" brand: "martindale" price: "€ 42.64" currency: EUR in_stock: true reviews_count: 8 url: https://www.desertcart.be/products/52874555-martindale-cp501-classic-check-plug-240v-socket-tester-blue store_origin: BE region: Belgium --- # 240V max voltage 3 bright LEDs for instant fault ID Detects 28 wiring faults Martindale CP501 Classic Check Plug 240V Socket Tester, Blue **Brand:** martindale **Price:** € 42.64 **Availability:** ✅ In Stock ## Summary > 🔌 Plug in confidence, test with precision! ## Quick Answers - **What is this?** Martindale CP501 Classic Check Plug 240V Socket Tester, Blue by martindale - **How much does it cost?** € 42.64 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/52874555-martindale-cp501-classic-check-plug-240v-socket-tester-blue) ## Best For - martindale enthusiasts ## Why This Product - Trusted martindale brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Ergonomic & Durable:** Sculpted grip and tough ABS housing for effortless use and longevity - • **Trusted by Millions:** Over 2 million units sold—join the community of confident electricians and homeowners - • **Clear Visual Indicators:** Three bright LEDs provide immediate, easy-to-read fault codes - • **Instant Safety Assurance:** Quickly verify UK 240V sockets with a trusted classic - • **Comprehensive Fault Detection:** Pinpoints 28 common wiring issues for total peace of mind ## Overview The Martindale CP501 Classic Check Plug is a compact, robust 240V socket tester designed for quick and reliable verification of UK electrical outlets. Featuring three bright LEDs that detect 28 wiring faults, it ensures safety compliance with clear fault codes. Its ergonomic design and proven reliability make it a top choice for both professionals and homeowners. ## Description Sold in over 2 million units, the Martindale CP501 is the most popular socket tester available. The classic check plug is a quick and easy way to ensure that 13A sockets are correctly wired, indicated by 3 bright long life LEDs. Wiring faults are indicated by one or more of the LEDs failing to illuminate, with the pattern of lit LEDs indicating the type of fault detected. This fail-safe system means that any LED not lit indicates a fault. The robust ABS housing has a sculpted shape for easy removal and there is a look up chart on the tester for quick fault diagnosis. The plug induces less than 5mA of earth leakage, well below RCD trip thresholds. ## Features - Quick and easy testing of 240V UK sockets to ensure correct wiring and safety compliance - Detects 28 common wiring fault conditions for reliable electrical safety checks - Three bright LEDs with clear fault codes for instant and accurate identification - Compact and tough design with sculpted grip for easy removal from sockets - Ideal for electricians and homeowners for fast socket verification before use ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B003OHDFSA | | Best Sellers Rank | 38,676 in DIY & Tools (See Top 100 in DIY & Tools) 46 in Circuit Testers | | Brand | Martindale | | Colour | Blue | | Country Of Origin | China | | Customer Reviews | 4.7 4.7 out of 5 stars (705) 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 | | Power Source | Electric | | Product Warranty | 2 year | | Style Name | Classic | | Unit Count | 1.0 count | ## Product Details - **Brand:** Martindale - **Colour:** Blue - **Item weight:** 0.06 Kilograms - **Power source:** Electric - **Style:** Classic ## Images ![Martindale CP501 Classic Check Plug 240V Socket Tester, Blue - Image 1](https://m.media-amazon.com/images/I/61JnqbmHWCL.jpg) ![Martindale CP501 Classic Check Plug 240V Socket Tester, Blue - Image 2](https://m.media-amazon.com/images/I/51tQKwpyKWL.jpg) ![Martindale CP501 Classic Check Plug 240V Socket Tester, Blue - Image 3](https://m.media-amazon.com/images/I/511QconXEkL.jpg) ![Martindale CP501 Classic Check Plug 240V Socket Tester, Blue - Image 4](https://m.media-amazon.com/images/I/51UAe55+YEL.jpg) ![Martindale CP501 Classic Check Plug 240V Socket Tester, Blue - Image 5](https://m.media-amazon.com/images/I/51aQCDwBLrL.jpg) ## Questions & Answers **Q: Will this show up a socket that has power fluctuations?** A: The Martindale CP501 Socket Tester is primarily designed to identify wiring faults and will not reliably show power fluctuations. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Simple and Reliable Socket Safety Checker *by on Reviewed in the United Kingdom 3 May 2026* 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. ### ⭐⭐⭐⭐⭐ Good product. Recommend. *by on Reviewed in the United Kingdom 2 March 2026* Bought a few of these now. ### ⭐⭐⭐⭐ Recommend *by on Reviewed in the United Kingdom 15 January 2026* Great value, packaged well. Does the job. ## Frequently Bought Together - Martindale CP501 Classic Check Plug 240V Socket Tester, Blue - Martindale VT12 Two Pole Voltage and Continuity Tester, Yellow - Martindale Electric NC4 Dual Sensitivity Voltage Tester, Volt Stick with Torch, Circuit Tester --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.be/products/52874555-martindale-cp501-classic-check-plug-240v-socket-tester-blue](https://www.desertcart.be/products/52874555-martindale-cp501-classic-check-plug-240v-socket-tester-blue) --- *Product available on Desertcart Belgium* *Store origin: BE* *Last updated: 2026-06-14*