The UNI-T UT18E voltage and continuity tester is a practical tool for rapid diagnostics of electrical equipment. It enables the measurement of AC/DC voltages up to 1000 volts, the testing of phase sequence, circuit continuity and the operation of residual current circuit breakers. It is comfortable to use, but at the same time provides a clear reading both on the LCD screen and with the help of the backlit LEDs.
UT18E supports up to 8 voltage levels: 6V, 12V, 24V, 50V, 120V, 230V, 400V, 690V and 1000V. It works in both AC and DC mode, so it is suitable for different types of equipment - both for household and industrial equipment. The automatic polarity detection function also helps to avoid errors when diagnosing DC circuits.
The tester allows you to check circuit continuity from 0 Ω to 60 kΩ, with a built-in buzzer and LED light to indicate that current is flowing properly. The UT18E also enables testing of residual current devices (RCDs) at 230 V and 50-400 Hz, which increases the safety of using the equipment.
The LCD display indicates the voltage in the range of 6-1000 V and the frequency in the range of 40-400 Hz. A built-in flashlight, sound signal, automatic shutdown function and silent mode make the UT18E a convenient device. The tester is IP65 rated, which means it is dust and splash resistant - it works well in construction and industrial environments.

- Model UT18E
- Voltage range (AC/DC) 6V ± (1.5%＋1); 12V ± (1.5%＋2); 24V ± (1.5%＋2); 50V ± (1.5%＋3); 120V ± (1.5%＋4); 230V ± (1.5%＋5); 400V ± (1.5%＋5); 690V ± (1.5%＋5); 1000V ± (1.5%＋5).
- Phase rotation test 100V ac～400V ac (3 phases); frequency 50/60 Hz
- Continuity test Resistance: 0Ω~60kΩ; audible light signal
- RCD test Operating voltage: 230V (50~400 Hz)
- Polarity detection positive and negative
- Self-test LED or LCD
- Power failure test 100~1000V
- Standby current ＜10μA
- Backlight Yes
- Silent mode Yes
- Surge protection Yes, 1100 V
- Low battery indicator Yes (approx. 2.4 V)
- LCD display (voltage) 6V~1000V
- LCD display (frequency) 40 Hz ~ 400 Hz
- Waterproof IP65
- Weight (with batteries) 277 g
- Dimensions 272 x 85 x 31 mm