The Fluke ST240+ / UK is a plug-in device that easily fits into the socket and checks the wiring status including phase, neutral, and earth.
With three illuminated LED lights and an accompanying guide, it quickly identifies common wiring errors such as earth fault, neutral fault, phase reversal, or reversed neutral and earth.
One of the standout features of this model is the audible alarm, which sounds when voltage is present in the socket, helping users to quickly identify the circuit connected to the socket. This alarm can also be silenced to avoid disruption in quiet environments.
Using the built-in button, the RCD (Residual Current Device) functionality can also be tested on RCD-equipped sockets. By simply pressing this button, the tester attempts to trip the RCD and check if it disconnects.
🔹 Key Features of Fluke ST240+ / UK
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Direct connection to UK three-pin sockets
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Detection of six wiring conditions (correct, earth fault, neutral fault, phase fault, reversed phase/neutral, reversed phase/earth)
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Audible alarm for voltage presence
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RCD test button to check RCD functionality
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Alarm silence option in sensitive environments
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Safety rating CAT II 300V
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Compact and practical design
🔹 Technical Specifications of Fluke ST240+ / UK
| Feature | Value |
|---|---|
| Operating Voltage | 230 V AC ±10% |
| Current Consumption | 4 mA |
| Power Consumption | Approximately 0.92 W |
| Frequency | 50 Hz |
| Audible Alarm | Yes, can be silenced |
| RCD Test | Yes (one-touch button) |
| Indicators | 1 Red LED + 2 Green LEDs |
| Safety Rating | CAT II 300 V |
| Warranty | Two years |
❓ Frequently Asked Questions (FAQ)
Is the ST240+ exclusive to UK sockets?
Yes, its design is specifically for UK three-pin sockets with a voltage of 230 V.
What is the purpose of the audible alarm?
It alerts you when voltage is present in the socket so you can identify the corresponding fuse more quickly.
Can the alarm be silenced?
Yes, this model comes with a button to turn off the audible alarm, which is suitable for quiet environments.
Does the RCD button damage non-RCD sockets?
No, if the socket does not have an RCD, pressing the button only indicates non-functionality and does not damage the device.
🔚 Conclusion
If you are looking for a simple, quick, and versatile tester for home or workplace sockets in the UK, the Fluke ST240+ / UK is an excellent choice.
It provides features such as an audible alarm, one-touch RCD testing, and common wiring fault detection in one compact tool.
📎 Official Datasheet Link
👉 Download Datasheet Fluke ST240+ / UK (PDF)
