Knightsbridge Cable Tester Review

Who are Knightsbridge cable testers for?

Knightsbridge cable testers are designed for DIY enthusiasts, small business IT staff, and electricians who need reliable cable testing without the high cost of professional brands like Fluke or Klein. The range covers network cables (CAT5e/CAT6), phone lines (RJ11/RJ12), coaxial cables, and general electrical continuity and voltage testing. They are particularly popular in the UK market, where Knightsbridge is a well-known brand for electrical accessories and tools.

How do Knightsbridge cable testers perform?

Based on aggregated owner reviews from Amazon, Screwfix, and electrical forums, Knightsbridge testers generally perform well for basic continuity and wiremapping tasks. The CAT5e/CAT6 Network Tester is praised for its fast and accurate wiremapping, with LEDs lighting up in clear sequence. The Voltage & Continuity Tester provides reliable voltage indication and a loud beep for continuity, though some users note the LED scale can be hard to read in bright sunlight.

Performance is consistent across the range for simple go/no-go testing. However, they lack advanced features like TDR (Time Domain Reflectometer) for cable length measurement or True RMS voltage reading. For most DIY and light commercial work, the accuracy is sufficient, but professionals needing precise measurements may prefer higher-end brands.

Build quality and durability

Knightsbridge testers use plastic housings with varying levels of rubberization. The Voltage & Continuity Tester has a rubberized casing that offers good drop protection, while the RJ45/RJ11 Tester feels more basic. Owner reviews report that the testers survive occasional drops from workbenches, but they are not designed for heavy-duty construction site use. The included probes and leads are adequate but not as robust as those on professional testers.

Warranty information varies by retailer, but Knightsbridge typically offers a 1-year warranty against manufacturing defects. Some users have reported issues with battery contacts corroding over time if batteries are left in the unit, so removing the battery when not in use is recommended.

What to check before buying a cable tester

Before purchasing a cable tester, consider the types of cables you work with most often. For network cables, ensure the tester supports CAT6 or CAT6a if you work with gigabit or 10-gigabit networks. For electrical work, check the voltage range and safety rating (CAT II vs CAT III) to ensure it matches your typical tasks. Also consider whether you need features like PoE detection or RCD testing, as these add cost but can save time on specific jobs.

Mistakes to avoid when using cable testers

A common mistake is using a continuity tester on live circuits, which can damage the tester and pose a safety risk. Always verify the circuit is dead before testing continuity. Another mistake is assuming a wiremap test confirms cable performance; it only checks pin-to-pin continuity, not signal quality or bandwidth. For high-speed networks, a proper certification tester is needed. Finally, don't forget to test both ends of a cable run, as faults can occur at either termination point.

Alternatives to Knightsbridge cable testers

For those seeking higher accuracy or more features, Fluke Networks offers professional cable testers like the Fluke LinkIQ or Fluke MicroScanner, which provide TDR, distance measurement, and advanced diagnostics at a significantly higher price. Klein Tools also offers a range of network and voltage testers with better build quality and backlit displays. For budget-conscious buyers, generic testers from brands like Kuman or iMBAPrice offer similar functionality to Knightsbridge at even lower prices, though build quality may vary.