UNI‑T UT 681 Series Cable Testers
The UNI‑T UT 681 Series Cable Testers combine reliable performance with simple operation, to quickly diagnose wiring issues in Ethernet, telephone, BNC, and HDMI connections.
Each tester uses bright LED indicators to show open, short, cross, or correct wiring. With fast, slow, or scan modes, users can choose the best testing speed for the cable length. A single key activates testing; an automatic 10-minute rest mode conserves power. Powered by a 9 V battery, these testers are CE/UKCA certified.
UT681L covers RJ11/RJ45, UT681C adds BNC with included adapter, and UT681HDMI handles HDMI and mini‑HDMI cables up to 19 wires .
🛠 Technical Details
| Feature | Specification |
|---|---|
| Cable Types | RJ45, RJ11 (all); BNC (UT681C); HDMI A/C and mini‑HDMI (UT681HDMI) |
| Wire Count Display | LEDs up to 8 for L/L; up to 19 for HDMI |
| Test Modes | Fast, Slow, Scan (HDMI) |
| Power | 9 V battery (≥7.2 V low battery alert) |
| Auto Power-off | After ~10 minutes inactivity |
| Safety Standards | CE EN61326-1/2-2, UKCA |
| Operating Environment | 0–40 °C, humidity 20–80 % RH, ≤2000 m altitude |
| Dimensions & Weight | Tx: 102×62×28 mm (87 g); Rx: 102×37×28 mm (51 g) |
⚠️ Precautions & Tips
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Ensure firm cable seating into connectors before testing.
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Use scan mode for long HDMI cables; switch to slow/fast for RJ45.
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Replace the 9 V battery when LED brightness dims or auto-shutdown occurs quickly.
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Store in moderate conditions (–10 to +50 °C, ≤90 % RH).
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Use only with the correct adapter to avoid misalignment (e.g., BNC for UT681C).
💡 Use Cases & Applications
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Network Installations & Troubleshooting: Quickly validate new or existing Ethernet (Cat5e/6) runs.
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Telephony & Intercom Systems: Test RJ11 phone line wiring in office or home installations.
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Security & CCTV Wiring: Use UT681C for BNC coax connections in cameras or monitors.
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HDMI & AV Setup: UT681HDMI checks HDMI cable integrity in media rooms or pro AV systems.
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Educational Labs & Field Kits: Compact, durable testers for training environments and service kits.
🎥 YouTube Tutorial
🏁 Conclusion & Value Proposition
The UNI‑T UT 681 Series delivers fast, precise cable diagnostics across Ethernet, phone, coax, and HDMI formats. Their intuitive LED interface, scan options, and solid build make them essential for every technician’s toolkit.
Available now at Electroway—keep your wiring dependable and installation-ready.
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