I-T UT18B / UT18D Digital Voltage & Continuity Tester – 690V AC/DC

Product Overview

The UNI-T UT18B / UT18D Digital Voltage & Continuity Tester is a professional-grade electrical testing tool designed for electricians, engineers and maintenance professionals. Built to safely test AC/DC voltage up to 690V, it also performs continuity testing, polarity detection, phase sequence testing and RCD verification, making it an essential tool for fault finding and electrical inspections.

Designed for demanding work environments, the UT18 series features a rugged IP65-rated housing and meets CAT IV 600V safety standards for enhanced protection. 

Key Features

✔ Measures AC & DC voltage from 6V to 690V

✔ Continuity testing with audible buzzer

✔ Three-phase rotation (phase sequence) testing

✔ Built-in RCD (Residual Current Device) test

✔ Positive & negative polarity detection

✔ Single-pole live voltage detection

✔ Bright LCD display (UT18D) / LED indication (UT18B)

✔ Integrated work light for low-light environments

✔ IP65-rated dust and water resistance

✔ CAT IV 600V safety rating for professional use 

Perfect For

• Electricians

• Industrial Maintenance

• Commercial Installations

• Property Inspectors

• Facilities Management

• Building Contractors

• Workshop Testing

• Professional Electrical Diagnostics

Specifications

• Brand: UNI-T

• Model: UT18B / UT18D

• Product Type: Digital Voltage & Continuity Tester

• Voltage Range: AC/DC 6–690V

• Display: LED (UT18B) / LCD (UT18D)

• Frequency Range: 40–400Hz (UT18D LCD)

• Continuity Test: Yes (0–100kΩ)

• Phase Sequence Test: Yes

• RCD Test: Yes (230V)

• Polarity Detection: Positive & Negative

• Single-Pole Voltage Detection: Yes

• Protection Rating: IP65

• Safety Rating: CAT IV 600V / CAT III 690V

• Power Supply: 2 × AAA (R03) Batteries 

What's Included

• 1 × UNI-T UT18B / UT18D Voltage Tester

• 2 × AAA Batteries

• User Manual

Why Buy From Mr Fix Tools?

• 🇬🇧 Fast UK Delivery

• 🔒 Secure Checkout

• ⭐ Professional Quality Tools

• 💬 Friendly UK Customer Support

• 📦 Carefully Packed & Shipped from the UK