Uni-T UT18C Voltage And Continuity Tester

What is the UT18C voltage tester?

The UT18C is a rugged, high-performance voltage tester made for sparkies and techs who work in tough environments. It’s packed with essential safety features and advanced diagnostics you can count on.

Table of contents

• ✅ Key features
• ✅ Specs & performance
• ✅ What's included
• ✅ Who it’s for

Key features

This tester helps you get safe, accurate results fast—whether you're inspecting panels or working on three-phase power.

• ✅ Measures AC/DC voltage from 6V to 690V including three-phase systems
• ✅ Phase rotation test and visual phase indication
• ✅ Built-in RCD test function for switchboard safety checks
• ✅ Auto-ranging with data hold for convenience
• ✅ LED indicators and built-in light – easy to read even in dark switchboards
• ✅ CAT IV 600V safety rating for high-risk environments
• ✅ IP65-rated – dustproof and water-resistant for harsh worksites
• ✅ Auto standby and low battery alert around 2.5V

Specs & performance

Engineered to meet professional demands in industrial or commercial settings.

• ✅ Voltage range: 6V–690V with high precision
• ✅ RCD test: Operates at 230V (50–400Hz)
• ✅ Phase rotation: Detects between 57V–400V, 50–400Hz
• ✅ Continuity check: Resistance up to 100kΩ with audio/visual alerts
• ✅ Silent mode, over-voltage warning, and polarity detection built in
• ✅ Standby current under 10μA for battery life extension

What's included

All the essentials to get started right away—no extras needed.

• ✅ 1 x UT18C Voltage Tester
• ✅ Batteries included
• ✅ Easy-to-follow English manual
• ✅ Backed by a 12-month warranty

Who it’s for

Designed for electricians, industrial technicians, and anyone working on smelting sites, manufacturing floors, or exposed outdoor switchgear. If you need a tester that stands up to the elements and won’t miss a beat, the UT18C is it.

✅ Comparison Chart: UT18C vs UT15C Voltage Tester