Plug Into Innovation: Your Essential Socket & See Product Guide
- Built for reliability, and safety in electrical test equipment
Socket & See is a British brand renowned for innovation, reliability, and safety in electrical testing. The company designs easy-to-use products that make testing safer and more efficient for professionals, with many industry firsts along the way.
Socket & See's range covers all the essential tools for electrical professionals – from plug-in socket testers to advanced loop impedance testers. In this blog, we'll explore some of their key offerings, including the Socket & See Socket Tester, Socket & See Proving Unit, Socket & See PDL 234, and Socket & See Loop Tester.
One resource you won't want to miss is the Socket & See Product Guide Brochure, which gives a complete overview of the brand's equipment.
- See key feature and key spec all in one place:

Every electrician has used a socket tester – it's often the first tool to check if a mains outlet is wired correctly.
A Socket & See Socket Tester makes this process quick and fool proof: just plug it in and it immediately displays the wiring status via bright LEDs (and an audible tone). If there's a missing earth or a reversed live and neutral you'll know in seconds.
Using a Socket & See Socket Tester before plugging in equipment or starting work ensures there are no hidden wiring dangers.
Why choose Socket & See Socket for your Socket Tester:
User-friendly operation: Plug in and get results instantly – no complicated setup or interpretation required
Enhanced safety checks: Detect potentially dangerous conditions like live-earth reversals or missing neutrals
Identifying wiring faults at a glance: Address problems before they cause shocks or equipment damage
First-line of troubleshooting tool: A crucial first line of defence for safety on any job
Multiple Socket & See Socket Tester models to suit different needs:
- Basic units use simple LED indications
- Advanced models like the SOK32 use tri-colour LEDs and can pinpoint which specific conductor is at fault!

With various options available, you can choose the Socket & See Socket Tester that best fits your workflow and safety requirements. All models share the same robust build quality and reliable performance that Socket & See is known for. See the below comparison chart for the options available from Socket & See:
|
SOK22 |
SOK32 |
SOK34 |
SOK36 |
Indicates good, plus 13 fault conditions |
✔ |
✔ |
✔ |
✔ |
Continuous tone indicates good |
✔ |
✔ |
✔ |
✔ |
Warbling tone indicates fault condition |
✔ |
✔ |
✔ |
✔ |
Bright easy to read LEDs |
✔ |
✔ |
✔ |
✔ |
No trip indication of earth present |
✔ |
✔ |
✔ |
✔ |
Advance electronics to give good indication even on noisy circuits |
✔ |
✔ |
✔ |
✔ |
Advanced fault location |
|
✔ |
✔ |
✔ |
Tri colour LEDs |
|
✔ |
✔ |
✔ |
Built in self-test |
|
✔ |
✔ |
✔ |
Robust over mould |
|
|
✔ |
✔ |
No Trip earth loop test, gives GOOD, CHECK, URGENT CHECK indication |
|
|
✔ |
✔ |
Polarity test pad, Identifies reverse L-N supply on PME systems |
|
|
|
✔ |
30mA RCD functional test |
|
|
|
✔ |
The Socket & See Socket Tester is an indispensable tool for every electrician. Many professionals keep a Socket & See Socket Tester in their kit for everyday use, trusting that their Socket & See Socket Tester will give immediate warning of any wiring problems.
In short, the Socket & See Socket Tester range provides unmatched simplicity and safety.
The Socket & See Socket Tester is a simple yet powerful tool for identifying wiring faults early during routine maintenance, helping to save time and ensure electrical safety in both commercial and domestic settings.
A critical step for any electrician is safe isolation — confirming that a circuit is completely de-energised before beginning any work. Following UK safe isolation procedures, it’s essential to prove your voltage tester on a known live source or a Socket & See Proving Unit, both before and after checking that a circuit is dead.
The Socket & See Proving Unit offers a convenient, portable source of known voltage, removing any guesswork and helping you stay compliant with safety best practices. It ensures your voltage tester is functioning correctly by providing a reliable test voltage, giving you confidence in your equipment both before and after isolating a circuit.
True AC voltage for realistic testing: Socket & See's proving units stand out because they generate a true AC waveform for testing.
- It's the first proving unit to generate a true 50Hz AC test voltage, so your voltage indicators are tested under real mains-like conditions.
Versatile and compatible: A Socket & See Proving Unit works with two-pole testers, test lamps, and multimeters from any brand, allowing you to verify all your voltage detectors with one reliable proving unit.
Battery-powered convenience: Powered by standard AA batteries, it provides hundreds of tests per set of batteries and features automatic power-off and a low-battery warning. The Socket & See Proving Unit is always ready when you need it.
Including a Socket & See Proving Unit in your toolkit demonstrates a commitment to working safely and correctly. Paired with Socket & See voltage indicators and lock out tag out kits, it forms a complete safe isolation system that provides peace of mind for both you and your clients. With this reliable foundation, electricians can confidently proceed with the task at hand.
Make a Socket & See Proving Unit part of your routine and it will dramatically enhance your safety on the job. With a Socket & See Proving Unit always at hand, you never have to guess if your voltage tester works – the Socket & See Proving Unit gives you confidence every time. Truly, a Socket & See Proving Unit is essential equipment for anyone working on electrical systems.
Consider a common scenario: before working on a consumer unit, an electrician uses a Socket & See Proving Unit to check that their voltage indicator is functioning correctly. Only then do they proceed to isolate the circuit and confirm with the Socket & See Proving Unit again that the system is dead. This practice, using a Socket & See Proving Unit every time, ensures no live circuit is ever mistakenly handled.

Electrical installations must have a low earth fault loop impedance to ensure fuses or circuit breakers trip quickly in the event of a fault. The Socket & See Loop Tester range makes verifying this fast, accurate, and hassle-free – even in situations where traditional testers struggle – a Socket & See Loop Tester excels in such cases.
A standout feature of Socket & See Loop Testers is their no-trip technology. Tripping a customer's RCD or RCBO during testing can be disruptive, but a Socket & See Loop Tester uses a low-current test method that avoids tripping 30 mA RCDs. This means you can perform essential loop tests without cutting power to appliances or inconveniencing the client. It's a major time-saver for contractors working in occupied properties because tests can be completed with minimal disturbance.
The Socket & See Loop Tester line-up includes both dedicated single function testers and multifunction testers that incorporate loop impedance among other measurements. Some plug-in loop testers even double as socket testers, giving a simple green or red indication of safe loop impedance. For example, a green light might indicate a pass below a set threshold, while red warns of a high impedance that needs urgent attention. This “go” / “no-go” indicator method – as used by the Socket & See PDL 234 kit – gives an immediate “safe” or “not safe” answer for quick checks.
No-trip testing: Every Socket & See Loop Tester is engineered to measure earth fault loop impedance without tripping RCDs in the circuit. This allows for safe testing on any installation, even those with very sensitive ground-fault protection. Electricians can carry out all necessary tests confidently, without the hassle of constantly resetting breakers or explaining power interruptions.
Fast, simple operation: Socket & See keeps it simple – many Socket & See Loop Tester units perform a test with just one button press (or simply upon plugging in). Within seconds, the Socket & See Loop Tester will indicate the result. This speed and simplicity let you move through testing quickly, saving valuable time during inspections or fault-finding jobs.
Clear pass/fail indicators: Rather than making you decipher results for every test, some Socket & See Loop Tester units use clear indicators to show if the loop impedance is within safe limits. For example, a green light might indicate a pass below a set threshold, while a red light warns of a high impedance that needs urgent attention. This “go” / “no-go” indicator method – as used by the Socket & See PDL 234 kit – gives an immediate “safe” or “not safe” answer for quick checks.

With a Socket & See Loop Tester, verifying the integrity of a circuit's earth fault path becomes straightforward. You can be confident that if a fault occurs, the circuit's protection will operate in time to prevent electric shock or fire. It's all about confidence and compliance – knowing that your measured loop impedance meets the required standards, and having a reliable tool that simplifies the process.
For anyone serious about electrical safety, a Socket & See Loop Tester is a must-have. Whether troubleshooting or certifying, using a Socket & See Loop Tester ensures you will catch dangerous high impedance issues. Professionals across the UK rely on Socket & See Loop Tester devices to verify installations meet safety regulations. In summary, a Socket & See Loop Tester provides peace of mind that every circuit you work on is properly protected.
In practice, electricians often measure loop impedance at the furthest outlets. A Socket & See Loop Tester makes this easy – for instance, checking that a kitchen circuit has a low enough impedance for the breaker to trip as required. By using a Socket & See Loop Tester on each critical circuit, you can document compliance and trust that all protection devices will operate properly under fault conditions.
One flagship product that combines many of these features is the Socket & See PDL 234 Loop Testing Kit. This multifunction tester is essentially a 4-in-1 device: it serves as a loop impedance tester, a mains voltage tester, a socket wiring tester, and a polarity checker – all in one compact unit. For electricians (especially those handling domestic installations and Part P compliance), it means one instrument can cover several critical tests quickly and reliably.
What sets the Socket & See PDL 234 apart is its no-trip loop testing technology and its built-in socket tester functionality. You can measure loop impedance without tripping RCDs, and at the same time the unit checks the socket's wiring and polarity using tri-colour LEDs just like a dedicated Socket & See Socket Tester. It also provides an accurate mains voltage reading. In effect, with every test you perform using a Socket & See PDL 234, you're automatically covering multiple safety checks in one go.
4-in-1 functionality: The Socket & See PDL 234 combines four essential tests into one unit – earth loop impedance, mains voltage level, socket wiring status, and polarity. This comprehensive capability makes it a professional's choice for quick yet thorough safety testing on site.
No-trip loop testing: Like other Socket & See Loop Tester devices, the Socket & See PDL 234 uses no-trip technology so you can test loop impedance on live circuits without nuisance tripping.
Built-in socket tester: When you plug the Socket & See PDL 234 into an outlet, it immediately functions as a Socket & See Socket Tester, using its LEDs to indicate if the wiring is correct. It includes the same fault indications found in the standalone testers, so you aren't missing any information by using this combination device.
If you want one tool that does it all, the Socket & See PDL 234 kit is hard to beat. Electricians love how the Socket & See PDL 234 handles multiple tests effortlessly. The Socket & See PDL 234 is a perfect example of how one device can boost both efficiency and safety on the job.
Imagine doing an Electrical Installation Condition Report on a property: the Socket & See PDL 234 allows you to plug in at each socket and run through the essential tests in one go. You can identify mis-wired outlets with the same Socket & See PDL 234, measure the voltage, and perform a non-trip loop test – then move to the next point. Without changing devices, the Socket & See PDL 234 Loop Testing Kit streamlines the whole process.

Socket & See BLOG The Takeaway - Equip Yourself for Safety and Efficiency
Socket & See truly understands the needs of electricians and contractors. They offer tools that make electrical testing safer and easier. Whether it's the simplicity of a Socket & See Socket Tester, the assurance of a Socket & See Proving Unit, the convenience of a Socket & See PDL 234 multi-function tester, or the precision of a Socket & See Loop Tester, each product is designed to solve real-world problems on the job. Using these tools in daily work helps you stay safe, ensure compliance, and save time by getting it right the first time.
Don't miss out on the latest Socket & See innovations – Download the Socket & See Product Guide Brochure today to explore the full range of solutions. And when you're ready to upgrade your kit, remember you can Browse our full range of Socket & See test equipment to find the perfect instruments for your needs. Equip yourself with Socket & See and work with confidence knowing you have some of the industry's most trusted test tools by your side. (This article covered the Socket & See Socket Tester, Socket & See Proving Unit, Socket & See PDL 234, and Socket & See Loop Tester, each offering unique advantages.)
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