UNI-T UT139S TRUE RMS DIGITAL MULTIMETERS

UNI-T UT139 Series True RMS Digital Multimeters

The UNI-T UT139 Series True RMS Digital Multimeters are designed for professionals, electricians, and technicians who require high-precision measurements and advanced functionality. With True RMS measurement capability, these multimeters ensure accurate readings for both linear and non-linear loads, making them ideal for a wide range of electrical applications.

In addition, the UT139 Series includes MAX, MIN, and REL modes along with a data hold function, allowing users to capture and analyze measurement fluctuations and easily compare values. Moreover, the LED backlight and auto power-off feature improve usability and extend battery life, ensuring consistent performance during long work sessions.

Safety is a top priority, and the UT139 Series provides full-range protection up to 600V, giving users peace of mind while working with live circuits. Furthermore, the NCV (Non-Contact Voltage) feature enables safe detection of live wires without direct contact, adding convenience and reducing risk.

With both auto and manual range selection, the UNI-T UT139 Digital Multimeter offers the flexibility and precision required for professional electrical testing, troubleshooting, and maintenance. As a result, it is a reliable, versatile, and user-friendly tool for demanding work environments.

  • True RMS measurement for accurate readings on linear and non-linear loads.

  • MAX/MIN/REL modes for capturing fluctuations and comparing values.

  • Data hold, LED backlight, and auto power-off for usability and battery conservation.

  • Full-range protection up to 600V for enhanced safety.

  • NCV (Non-Contact Voltage) detection for live wire safety.

  • Auto and manual range selection for flexible, precise measurements.

Specifications of UNI-T UT139 Series True RMS Digital Multimeters

Specifications

Range

UT139A

UT139B

UT139C

UT139S

DC voltage (V)

600V

±(0.5%+2)

±(0.5%+2)

±(0.5%+2)

±(0.5%+2)

AC voltage (V)

600V

±(1%+3)

±(0.8%+3)

±(0.8%+3)

±(0.8%+3)

DC current (A)

10A

± (0.7%+2)

±(0.7%+2)

±(0.7%+2)

±(0.7%+2)

AC current (A)

10A

±(1%+3)

±(1%+3)

±(1%+3)

±(1%+3)

Resistance (Ω)

20MΩ

±(1%+2)

40MΩ

±(0.8%+2)

60MΩ

±(0.8%+2)

±(0.8%+2)

Capacitance (F)

99.99mF

±(4%+5)

±(4%+5)

±(4%+5)

Frequency (Hz)

10Hz~10MHz

±(0.1%+4)

±(0.1%+4)

±(0.1%+4)

Temperature (°C)

-40°C~1000°C

±(1%+3)

±(1%+4)

Temperature (°F)

-40°F~1832°F

±(1.5%+5)

±(1.5%+5)

Features

Display count

2000

4000

6000

6000

Auto range/Manual range

/True RMS

Bandwidth (Hz)

45Hz~400Hz

45Hz~1kHz

45Hz~1kHz

45Hz~400Hz

NCV/Continuity buzzer

Duty cycle

0.1%~99.9%

Diode

Around 2V

Around 3V

Around 3V

Around 3V

LPF/LoZ (ACV)

Analog bar

General Characteristics

Power

1.5V battery (R6) x 2

Display

58mm x 36mm

Product color

Red and grey

Product net weight

UT139A/B/C: 354g; UT139S: 345g

Product size

170mm x 80mm x 48mm

Standard accessories

UT139A/B: Batteries, test leads;

UT139C/S: Batteries, test leads, temperature probe

Standard individual packing

Gift box, English manual

Standard quantity per carton

20pcs

Standard carton measurement

450mm x 330mm x 340mm

Standard carton gross weight

12.2kg

Optional accessory

UT139C: Current sensor AC/DC 40A