Uni-T UT15B Voltage and Continuity Tester with LED Display

The Uni-T UT15B is a robust voltage and continuity tester engineered for efficient electrical diagnostics. This device provides reliable AC/DC voltage detection across a wide range from 12 V to 690 V, utilizing clear LED indicators and automatic range selection to simplify testing procedures. It is equipped with essential diagnostic functions, including circuit continuity testing with audible and visual alerts, polarity detection, phase rotation testing, and single-probe voltage detection. Built to withstand demanding environments, the tester features an IP65 protection rating and includes a convenient integrated flashlight for operation in low-light conditions.

Advantages

The device offers high operational reliability through its automatic range switching, which minimizes the risk of errors during measurements. Its durable construction with an IP65 rating ensures protection against dust and water, making it suitable for professional use in various environments. The combination of audible and visual signals for continuity testing provides clear feedback, while the integrated flashlight enhances visibility in dark workspaces. Furthermore, the ergonomic design and lightweight build allow for comfortable handling during extended diagnostic tasks.

Suitable for

• Electrical installation diagnostics
• Voltage verification in AC and DC circuits
• Circuit continuity testing
• Phase rotation testing in three-phase systems
• Single-probe voltage detection
• Field maintenance and workshop electrical repairs

This tester is not intended for high-precision laboratory measurements where digital numeric values are required, as it relies on LED indicators rather than an LCD screen. It is also not suitable for measuring voltages exceeding 690 V or for use in environments where specific safety certifications beyond IP65 are mandated.

Key specifications

• Voltage measurement range: 12 V to 690 V AC/DC
• Continuity test range: 0 to 100 kΩ
• Phase rotation test range: 0 to 690 V (50–60 Hz)
• Single-probe voltage detection range: 0 to 690 V (50–400 Hz)
• Protection class: IP65
• Power supply: 2 × 1.5 V (R03) batteries
• Dimensions: 275 × 51 × 30 mm
• Weight: 210 g

How to use

To begin, ensure the batteries are correctly installed and check the device status using the battery indicator. For voltage testing, connect the probes to the circuit; the LED indicators will automatically display the detected voltage level. For continuity testing, touch the probes to the circuit points; a continuous tone and LED light will confirm a closed circuit. Use the single-probe detection feature by contacting the L2 probe to the conductor. Always observe safety protocols when working with live electrical systems.

What to consider before purchase

• Verify that the voltage range of 12–690 V meets your specific application requirements.
• Ensure that the LED-based indication is sufficient for your diagnostic needs, as this model does not feature an LCD screen.
• Confirm that the device's IP65 rating is appropriate for your typical working environment.

Always inspect the test leads for any signs of damage before each use. Ensure the device is kept clean and dry, and replace the batteries promptly when the low battery indicator activates to maintain measurement accuracy.