Uni-T UT18D is a practical tester for quick installation diagnostics – it measures AC/DC voltage, performs a continuity test, checks phase sequence, and helps with polarity detection. With a large backlit LCD, rugged IP65 protection, and safety rating CAT IV 600 V, it is suitable even for demanding conditions.
The Uni-T UT18D tester is the best-equipped model in the UT18 series, designed for installation and service work. It allows you to conveniently verify the presence of voltage, check three-phase distribution systems, and quickly test circuit continuity. The clear backlit display also shows frequency, making it easier to check mains parameters.
Key features and benefits:
- Voltage measurement 6–690 V (AC/DC) and LCD indication in the 6–690 V range
- Frequency display 40–400 Hz on the LCD
- Phase sequence test for 3-phase installations (57–400 V AC, 50–400 Hz)
- L2 voltage detection on a single conductor (100–690 V, 50–400 Hz)
- Continuity test 0 Ω – 100 kΩ with audible and LED indication
- RCD test at 230 V
- Positive and negative polarity detection
- Self-test to verify display operation
- Silent mode, automatic standby, flashlight, and low-battery indicator
Rugged construction with IP65 protection and CAT IV 600 V measurement category increases safety during work. The large display (73.5 × 35.5 mm) improves readability of results, and the compact dimensions are practical for everyday carry in a tool bag.
Specifications
- Manufacturer
- Uni-T
- Model
- UT18D
- Product type
- Voltage and continuity tester
- Voltage indication
- LCD
- LCD backlight
- Yes
- Voltage range
- 6 V (5 V ± 1 V), 12 V (8 V ± 1 V), 24 V (18 V ± 2 V), 50 V (38 V ± 4 V), 120 V (94 V ± 8 V), 230 V (180 V ± 14 V), 400 V (325 V ± 15 V), 690 V (562 V ± 24 V)
- LCD voltage range
- 6 V–690 V
- LCD frequency range
- 40 Hz–400 Hz
- LCD voltage accuracy
- ±(1.5 % + 5)
- LCD frequency accuracy
- ±(3 % + 5)
- LCD display size
- 73.5 mm × 35.5 mm
- Phase rotation test
- 57 V AC – 400 V AC, 3 phases, 50 Hz – 400 Hz
- L2 voltage detection on a single conductor
- 100 V – 690 V, 50 Hz – 400 Hz
- Continuity test
- 0 Ω–100 kΩ
- Continuity test accuracy
- +50 %
- Continuity test indication
- Audible signal and LED
- RCD test
- 230 V, 50 Hz–400 Hz
- Polarity detection
- Positive and negative
- Self-test
- Yes
- Test without power
- No
- Overvoltage
- 713 V–788 V
- Silent mode
- Yes
- Automatic standby
- Yes
- Flashlight
- Yes
- Low-battery indicator
- Yes
- Protection degree
- IP65
- Measurement category
- CAT IV 600 V
- Power supply
- 2× 1.5 V batteries (R03)
- Weight
- 280 g
- Dimensions
- 272 mm × 85 mm × 31 mm
- Color
- Red and gray
