Uni-T UT18C Voltage And Continuity Tester

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UT18C Voltage and Continuity Tester Are Designed For Testing AC/DC Voltage, 3-Phase Voltage, Phase Sequence, Continuity.


The Uni-T UT18C can provide AC and DC voltage (including the three-phase alternating current) measurement, phase of three-phase AC power indicator, on-off test, RCD Test, single pen measurement (can determine the zero line or wire), self-checking, no battery detection and other functions.

This series is categorized as CAT IV 600V and meets the IP65 standard. Application fields for UT18C include smelting, electronics, manufacturing, and electrical. It is a perfect tool for electricians, to quickly measure voltage levels in any harsh environments.


  • CAT IV 600V rating
  • Auto Range
  • Date Hold
  • LED Indication
  • RCD Test
  • Phase Rotation Test
  • Single Lead (L2) Voltage Detection
  • Self-inspection
  • On-off test
  • Light function.
  • No Battery Detection
  • Polarity Detection
  • Over Voltage Indication
  • Low Battery Indication
  • Auto standby
  • Silent Mode.

1 x UT18D, 1 x English manual, 1 x Batteries, 12 Month Warranty


Specifications Range UT18C UT18D
Voltage (V) 6V 5V±1V
12V 8V±1V 8V±1V
24V 18V±2V 18V±2V
50V 38V±4V 38V±4V
120V 94V±8V 94V±8V
230V 180V±14V 180V±14V
400V 325V±15V 325V±15V
690V 562V±24V 562V±24V
Phase rotation test 57Vac~400Vac (3 phase)
Frequency: 50Hz~400Hz
Single lead (L2)
voltage detection
Operating voltage: 100V~690V
Frequency: 50Hz~400Hz
Continuity test Resistance: 0Ω~100kΩ (+50% accuracy)
Beeper and LED light indication
RCD test Operating voltage: 230V (50Hz~400Hz)
Polarity detection Positive & Negative
Self-inspection All LED or LCD
No power test Operating voltage: 100~690V
Voltage indication LED LCD
Exceed voltage Voltage range: 713V~788V
Auto standby Standby current<10μA
Silent mode All range
Work light
Low battery indication Around 2.5V
LCD backlight
LCD display (voltage) 6V~690V ±(1.5%+5) ±(1.5%+5)
LCD display (Frequency) 40Hz~400Hz ±(3%+5) ±(3%+5)
General Characteristics
Power 1.5V battery (R03)×2
Display UT18C: 31mm x 20mm; UT18D: 73.5mm x 35.5mm
Product colour Red and grey
Product net weight 280g
Product size (W x H x D) 272mm x 85mm x 31mm
Standard accessories Batteries
Standard individual packing Blister, English manual


UT18C Voltage And Continuity Tester English Manual

UT18C Voltage And Continuity Tester Flyer