- True RMS measurement up to 600V: Reliable measurement of AC voltage and current in building electrical installations.
- CAT III 600V safety rating: Enhanced PTC overload protection and double insulation for technicians.
- NCV voltage detection: Non-contact voltage detection for quick and safe assessment.
- Backlit 6000-count display: Backlit LCD panel with a fast refresh rate of 2 to 3 times per second.
At a glance
True RMS Accuracy and Measurements
Select automatic or manual ranging and measure voltage up to 600V and current up to 10A with True RMS accuracy. Measure capacitance up to 99.99mF, resistance up to 60MΩ, and frequency with a 9999-count display. Quickly test diodes and circuit continuity with an audible buzzer for safe work on any electrical panel.
Specialized NCV Functions
Detect electric fields instantly without contact, thanks to the device’s built-in NCV function. Connect the K-type probe to measure temperatures from -40°C to 1000°C with high diagnostic accuracy. Attach a suitable clamp to measure current up to 60A, meeting all your needs in the field.
Ergonomics and Robust Durability
Work comfortably in low-light conditions thanks to the 68mm backlit TN LCD display with 6000-count resolution. Use the Data Hold function and view the minimum or maximum values during your tests. Rely on the durable housing, which withstands drops from 1m, and the automatic shut-off to save battery power.
Technical characteristics
- Model: UNI-T UT139C
- Measurement type: True RMS
- Safety rating: CAT III 600V, double insulation, 600V PTC overload protection
- Certifications: EN 61010, EN 61326, UL 61010, CSA C22.2
- AC voltage measurement range: 60 mV – 600 V (45 Hz – 1 kHz)
- DC voltage measurement range: 60 mV – 600 V
- AC current measurement range: 600 μA – 10 A
- DC current measurement range: 600 μA – 10 A (supports connection of a clamp up to 60 A)
- Resistance measurement range: 600 Ω – 60 MΩ
- Capacitance measurement range: 9.999 nF – 99.99 mF
- Frequency measurement range: 9.999 Hz – 9.999 MHz
- Duty cycle: 0.1% – 99.9%
- Temperature measurement: -40°C to 1000°C / -40°F to 1832°F (K-type sensor up to approximately 230°C)
- Additional features: NCV detection, continuity test (buzzer), diode test, Data Hold, Max/Min
- Display: 68 mm TN LCD, 6000 counts (up to 9999 counts for capacitance/frequency), backlit
- Sampling rate: 2–3 readings per second
- Power supply: 2 × 1.5V AA batteries
- Power management: Low battery indicator, automatic power-off
- Drop resistance: Up to 1 m
- Operating temperature: -10°C to 50°C
- Dimensions: 170 × 80 × 48 mm
- Weight: approximately 354 g (with batteries)
- Warranty: 36 months
Package contents
- 1 x UNI-T UT139C digital multimeter with protective cover
- 2 x AA 1.5V batteries
- 2 x Protective fuses (600mA / 10A)
- 1 x K-type temperature probe
- 1 x Set of test leads with probes
- 1 x User manual
- Colour
- Red
- with LCD Screen
- Yes
- True RMS
- Yes
- with Buzzer
- Yes
Important information
Specifications are collected from official manufacturer websites. Please verify the specifications before proceeding with your final purchase. If you notice any problem you can report it here.