A practical and reliable UNI‑T UT681C cable tester for quick checks of Ethernet (RJ45), telephone (RJ11), and coaxial (BNC) lines. Instantly identifies breaks, shorts, crossed pairs, and miswiring. With its compact size, clear LED indicators, 9V battery power, and auto power‑off, it’s ideal for field work and office use.
Multifunction testing for RJ45, RJ11, and BNC
The UT681C handles Ethernet, telephone, and coaxial cables. With the RJ45–BNC adapter, you can easily verify coax lines—from continuity to wire mapping.
Clear LED signaling and two modes
LEDs (LED1–LED8, LED_G) clearly display wire mapping. Switch between fast and slow modes for comfortable result reading.
Simple operation and power saving
A single button, automatic shutoff after 10 minutes, and a low‑battery indicator ensure worry‑free operation in the field and office.
The UNI‑T UT681C is a multifunction cable tester designed for rapid diagnostics of network, telephone, and coaxial connections. It provides continuity testing and detects shorts, open circuits, and crossed pairs, including verification of Ethernet shielding. One‑button control ensures simplicity and reliability for everyday use.
With two modules (transmitter and detachable receiver), you can easily test installed runs. Two test modes (fast/slow) and intuitive LED signaling (LED1–LED8, LED_G) speed up work and reduce errors. The auto‑off after 10 minutes function saves the battery, and the low‑battery indicator alerts you when it’s time to replace it.
Its robust build with CE and UKCA certifications is suitable for offices, server rooms, and field service. The package includes everything you need, including an RJ45–BNC adapter and a 9V battery, so you can start testing right away.
- Interface support: RJ45, RJ11, BNC (via adapter)
- Rapid diagnostics: shorts, breaks, crossing, miswiring
- Easy operation: single button, clear LEDs
- Mobility: compact size, 9V battery power, automatic shutoff
Specifications
- Manufacturer
- UNI‑T
- Model
- UT681C
- Supported connectors
- RJ45, RJ11, BNC (with RJ45–BNC adapter)
- Test functions
- Detection of shorts, breaks, crossing, and incorrect connections
- Test modes
- Fast, slow
- Result display
- LED indicators (LED1–LED8, LED_G)
- Ethernet cable shielding test
- Yes
- Control
- Single button
- Power supply
- 9V battery
- Automatic shutoff
- After 10 minutes of inactivity
- Low‑battery indicator
- Below 7.2 V
- Operating temperature
- 0 to 40 °C
- Storage temperature
- -10 to 50 °C
- Operating humidity
- 20 to 80% RH
- Storage humidity
- 10 to 90% RH
- Maximum operating altitude
- ≤ 2000 m
- Safety standards
- CE EN61326-1:2013, EN61326-2-2:2013; UKCA
- Dimensions
- Transmitter 102 × 62 × 28 mm; receiver 102 × 37 × 28 mm
- Net weight
- Transmitter 87 g; receiver 51 g
- Color
- Red‑gray
- Package contents
- Tester (transmitter and receiver), 9V battery, RJ45–BNC adapter, user manual
