UNI-T UT15B Universal Voltage and Continuity Tester with Phase Rotation

Electricians and maintenance technicians working on three-phase installations need a reliable way to verify voltage presence, check continuity, and confirm phase rotation—all without carrying multiple instruments. The UNI-T UT15B universal tester combines these essential functions in one rugged, pocket-sized tool. With LED indication for AC/DC voltage from 12V to 690V, audible continuity testing up to 100 kΩ, and a built-in phase rotation indicator for 50–60Hz systems, it covers daily tasks from panel checks to motor wiring. The single-pole voltage detection and polarity indication add extra convenience, while the IP65 rating and CAT III 690V safety certification ensure dependable performance even in dusty or damp environments.

Key specifications

• AC/DC voltage indication via LED: 12V, 24V, 50V, 120V, 230V, 400V, 690V
• Continuity test range: 0–100 kΩ with buzzer and LED
• Phase rotation test for 3-phase systems, 50–60Hz
• Single-pole voltage detection: 100V–690V
• Polarity detection for DC voltage
• Response time: <0.1s
• Input impedance: approx. 100 kΩ
• Safety rating: CAT III 690V, CAT II 690V
• IP65 dust and water resistance
• Power: 2 × 1.5V AAA batteries (low battery indication)
• Operating temperature: -15°C to 45°C
• Compliance: CE, EN61243-3

Why choose it

The UT15B eliminates the need for separate voltage testers, continuity meters, and phase rotation indicators. Its clear LED readout is visible even in bright sunlight, and the rugged IP65 housing withstands tough job site conditions. With a wide voltage range and fast response, it boosts productivity and safety for everyday electrical work.

Ideal use cases

• Verifying absence of voltage before maintenance (lockout/tagout)
• Checking phase sequence on motors and distribution boards
• Testing fuses, switches, and wiring continuity
• Identifying live conductors in junction boxes
• Quick polarity checks on DC circuits

Good to know

The tester is powered by two AAA batteries (included) and automatically indicates low battery. It is designed for use up to 2000m altitude and meets stringent European safety standards. Always follow local electrical safety regulations and use appropriate personal protective equipment.