Digital Multimeters

Uni-T Digital Multimeter True RMS with Buzzer with AC / DC / Resistance / Capacitance / Temperature Measurement UT139C

Key features:

  • True RMS measurement up to 600V
  • CAT III 600V safety rating
  • NCV voltage detection
  • 6000-count backlit display

Ensure maximum accuracy in electrical measurements with True RMS technology and reliable CAT III 600V safety certification.

See Description & Specifications
47 00 €
Delivery by Mon, 09 Nov
14,00 €   shipping cost
Sent from Greece
From Mega El Tech 5.0 (4)
Greece
14 pieces
See Multimeters on the page of Mega El Tech

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Reviews (48)

Reviews

  1. 39
  2. 5
  3. 3 stars
    0
  4. 2 stars
    0
  5. 4
Review this product
  • Construction quality
  • Accuracy in measurements
  • Value for money

What do users say? AI-generated summary

Users consider it to offer very good value for money, with reliable, accurate readings and plenty of features. It’s suitable for hobbyist and household tasks, and users praise its fast voltage measurement, protective cover, and temperature sensor. However, several note that some measurements and the continuity test are slow, and there are complaints of failures after a few years of use.

  • Spyros_Kat38
    5
    1 out of 1 members found this review helpful

    For amateur use in sockets, microelectronics, and anything at home, and for the first time in 3 years, it's just fine.

    Translated from Greek ·
    • Construction quality
    • Accuracy in measurements
    • Value for money
    Did you find this review helpful?
  • Baios4
    5
    2 out of 2 members found this review helpful

    Verified purchase

    The second one I buy, the first one fell from a 4-meter ladder and the crystal from the screen broke, it works normally but the first two digits are not visible.

    The voltage measurement is very fast compared to other multimeters that my colleagues have. In DC variable measurement, it captured almost 7-8 out of 10 values compared to colleagues who only captured 2-3.

    The rest of the features are purely for the tasks you need it for and the response speed is very good. I should add that my hands have handled faster multimeters, but at €50 its price is a steal.

    Translated from Greek ·
    • Construction quality
    • Accuracy in measurements
    • Value for money
    Did you find this review helpful?
  • LambisElef
    1
    1 out of 8 members found this review helpful

    Unfortunately, after 2 years, the temperature measurement stopped working, and after another 4, it stopped working completely, now showing hexadecimal digits on the screen.

    Translated from Greek ·
    Did you find this review helpful?
  • George_145
    5
    7 out of 7 members found this review helpful

    Verified purchase

    It comes with a temperature sensor, a pair of connectors, and a protective rubber cover. I am a value for money purchase (for both amateur and professional use)

    Translated from Greek ·
    Did you find this review helpful?
  • Ergina_Tourlou
    4
    5 out of 5 members found this review helpful

    Verified purchase

    It is not a cheap construction, but neither is it top-notch. However, it is a quality tool with accurate measurements and very good value for money. It is worth its price.

    Translated from Greek ·
    Did you find this review helpful?
  • telikoalex
    1
    6 out of 10 members found this review helpful

    Junk, I bought 1 and it broke without me using it much. After two years, I bought a second one thinking it was just a fluke, but I had it sitting on my counter without much use and the connector broke just like the first one. In the meantime, it never got a shock from electricity. Stay away, it’s the worst purchase I’ve made. I’ve been using the uni-t 58a model for almost 4 years and it has never done anything weird like this!!

    Translated from Greek ·
    Did you find this review helpful?
  • geoproto_p
    1
    5 out of 10 members found this review helpful

    In the 3 years with minimal use (I was using 18650 batteries and such), it broke. It's a shame and I thought it was good after the positive reviews I had seen. Money wasted !!!!!!!!!!!!

    Translated from Greek ·
    Did you find this review helpful?
  • Gillete
    1
    7 out of 12 members found this review helpful

    After 3 years of very occasional use and only for DC low voltage measurements, it gave up.. after searching international forums, I saw that I was not the only one.. wasted money in short

    Translated from Greek ·
    Did you find this review helpful?
  • Giannis_Koulis30
    4
    3 out of 3 members found this review helpful

    Verified purchase

    It is very good. Always in relation to its value for money. It also comes with a temperature measurement accessory and has electrical conductor detection. I am very satisfied.

    Translated from Greek ·
    Did you find this review helpful?
  • thodoris_kountouris
    5
    0 out of 3 members found this review helpful

    It has nothing to envy from an expensive Fluke multimeter. It's worth its money... very good, perfect, maybe even the best of all Uni-t, all this series of multimeters, simply perfect, excellent!

    Translated from Greek ·
    Did you find this review helpful?
  • kompas

    Verified purchase

    For the price, it is an excellent tool for someone who is not a professional or does not use it very often

    Translated from Greek ·
    Did you find this review helpful?
  • Nick_Icarus
    4
    2 out of 3 members found this review helpful

    Verified purchase

    It has many features on it and I think for its price it is fair. The only negative thing for me is the reading speed.

    Translated from Greek ·
    Did you find this review helpful?
  • abarm
    5
    3 out of 5 members found this review helpful

    Verified purchase

    Very good product at a very good price, the only small disadvantage is that the continuity test is a bit slow

    Translated from Greek ·
    Did you find this review helpful?
  • lou_try
    5
    5 out of 6 members found this review helpful

    One of the best multimeters out there, it's worth every euro it costs. The only negative thing is its probes, they could be better.

    Translated from Greek ·
    Did you find this review helpful?
  • Athanasios Ziakos
    5
    4 out of 5 members found this review helpful

    Good multimeter for its price, sturdy construction, with a protective case, a very good choice for anyone who wants to have a decent multimeter with features that you can find in more expensive ones. I highly recommend it

    Translated from Greek ·
    Did you find this review helpful?
  • 5
    1 out of 1 members found this review helpful

    Verified purchase

    So far, it does its job very well and, above all, reliably.

    Translated from Greek ·
    Did you find this review helpful?
  • Verified purchase

    Excellent multimeter for the money. There is also a very informative review on YouTube

    Translated from Greek ·
    • Construction quality
    • Accuracy in measurements
    • Value for money
    Did you find this review helpful?
  • I am very satisfied..!!

    Translated from Greek ·
    Did you find this review helpful?
  • Verified purchase

    Amazing multimeter, I am very satisfied.

    Translated from Greek ·
    Did you find this review helpful?
  • Verified purchase

    Fair for its price.

    Translated from Greek ·
    Did you find this review helpful?
  • 5
    0 out of 1 members found this review helpful

    Excellent for its price

    Translated from Greek ·
    Did you find this review helpful?
  • Excellent and expensive with the well-known quality of the company

    Translated from Greek ·
    Did you find this review helpful?
  • 5
    1 out of 1 members found this review helpful

    Verified purchase

    Although I don't know much, it seems to work well with many options

    Translated from Greek ·
    Did you find this review helpful?
  • Verified purchase

  • Verified purchase

  • Verified purchase

  • Verified purchase

  • For amateur use in sockets, microelectronics, and anything at home, and for the first time in 3 years, it's just fine.

    Translated from Greek ·
    1
  • The second one I buy, the first one fell from a 4-meter ladder and the crystal from the screen broke, it works normally but the first two digits are not visible.

    The voltage measurement is very fast compared to other multimeters that my colleagues have. In DC variable measurement, it captured almost 7-8 out of 10 values compared to colleagues who only captured 2-3.

    The rest of the features are purely for the tasks you need it for and the response speed is very good. I should add that my hands have handled faster multimeters, but at €50 its price is a steal.

    Translated from Greek ·
    2
  • Unfortunately, after 2 years, the temperature measurement stopped working, and after another 4, it stopped working completely, now showing hexadecimal digits on the screen.

    Translated from Greek ·
    1
  • It comes with a temperature sensor, a pair of connectors, and a protective rubber cover. I am a value for money purchase (for both amateur and professional use)

    Translated from Greek ·
    7
  • It is not a cheap construction, but neither is it top-notch. However, it is a quality tool with accurate measurements and very good value for money. It is worth its price.

    Translated from Greek ·
    5
  • See all

Description & Specifications

At a glance

  • 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.

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

Manufacturer

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.

Reviews (48)

  1. 39
  2. 5
  3. 3 stars
    0
  4. 2 stars
    0
  5. 4
Review this product
  • Construction quality
  • Accuracy in measurements
  • Value for money

What do users say? AI-generated summary

Users consider it to offer very good value for money, with reliable, accurate readings and plenty of features. It’s suitable for hobbyist and household tasks, and users praise its fast voltage measurement, protective cover, and temperature sensor. However, several note that some measurements and the continuity test are slow, and there are complaints of failures after a few years of use.

  • Spyros_Kat38
    5
    1 out of 1 members found this review helpful

    For amateur use in sockets, microelectronics, and anything at home, and for the first time in 3 years, it's just fine.

    Translated from Greek ·
    • Construction quality
    • Accuracy in measurements
    • Value for money
    Did you find this review helpful?
  • Baios4
    5
    2 out of 2 members found this review helpful

    Verified purchase

    The second one I buy, the first one fell from a 4-meter ladder and the crystal from the screen broke, it works normally but the first two digits are not visible.

    The voltage measurement is very fast compared to other multimeters that my colleagues have. In DC variable measurement, it captured almost 7-8 out of 10 values compared to colleagues who only captured 2-3.

    The rest of the features are purely for the tasks you need it for and the response speed is very good. I should add that my hands have handled faster multimeters, but at €50 its price is a steal.

    Translated from Greek ·
    • Construction quality
    • Accuracy in measurements
    • Value for money
    Did you find this review helpful?
  • LambisElef
    1
    1 out of 8 members found this review helpful

    Unfortunately, after 2 years, the temperature measurement stopped working, and after another 4, it stopped working completely, now showing hexadecimal digits on the screen.

    Translated from Greek ·
    Did you find this review helpful?
  • George_145
    5
    7 out of 7 members found this review helpful

    Verified purchase

    It comes with a temperature sensor, a pair of connectors, and a protective rubber cover. I am a value for money purchase (for both amateur and professional use)

    Translated from Greek ·
    Did you find this review helpful?
  • Ergina_Tourlou
    4
    5 out of 5 members found this review helpful

    Verified purchase

    It is not a cheap construction, but neither is it top-notch. However, it is a quality tool with accurate measurements and very good value for money. It is worth its price.

    Translated from Greek ·
    Did you find this review helpful?
  • telikoalex
    1
    6 out of 10 members found this review helpful

    Junk, I bought 1 and it broke without me using it much. After two years, I bought a second one thinking it was just a fluke, but I had it sitting on my counter without much use and the connector broke just like the first one. In the meantime, it never got a shock from electricity. Stay away, it’s the worst purchase I’ve made. I’ve been using the uni-t 58a model for almost 4 years and it has never done anything weird like this!!

    Translated from Greek ·
    Did you find this review helpful?
  • geoproto_p
    1
    5 out of 10 members found this review helpful

    In the 3 years with minimal use (I was using 18650 batteries and such), it broke. It's a shame and I thought it was good after the positive reviews I had seen. Money wasted !!!!!!!!!!!!

    Translated from Greek ·
    Did you find this review helpful?
  • Gillete
    1
    7 out of 12 members found this review helpful

    After 3 years of very occasional use and only for DC low voltage measurements, it gave up.. after searching international forums, I saw that I was not the only one.. wasted money in short

    Translated from Greek ·
    Did you find this review helpful?
  • Giannis_Koulis30
    4
    3 out of 3 members found this review helpful

    Verified purchase

    It is very good. Always in relation to its value for money. It also comes with a temperature measurement accessory and has electrical conductor detection. I am very satisfied.

    Translated from Greek ·
    Did you find this review helpful?
  • thodoris_kountouris
    5
    0 out of 3 members found this review helpful

    It has nothing to envy from an expensive Fluke multimeter. It's worth its money... very good, perfect, maybe even the best of all Uni-t, all this series of multimeters, simply perfect, excellent!

    Translated from Greek ·
    Did you find this review helpful?
  • kompas

    Verified purchase

    For the price, it is an excellent tool for someone who is not a professional or does not use it very often

    Translated from Greek ·
    Did you find this review helpful?
  • Nick_Icarus
    4
    2 out of 3 members found this review helpful

    Verified purchase

    It has many features on it and I think for its price it is fair. The only negative thing for me is the reading speed.

    Translated from Greek ·
    Did you find this review helpful?
  • abarm
    5
    3 out of 5 members found this review helpful

    Verified purchase

    Very good product at a very good price, the only small disadvantage is that the continuity test is a bit slow

    Translated from Greek ·
    Did you find this review helpful?
  • lou_try
    5
    5 out of 6 members found this review helpful

    One of the best multimeters out there, it's worth every euro it costs. The only negative thing is its probes, they could be better.

    Translated from Greek ·
    Did you find this review helpful?
  • Athanasios Ziakos
    5
    4 out of 5 members found this review helpful

    Good multimeter for its price, sturdy construction, with a protective case, a very good choice for anyone who wants to have a decent multimeter with features that you can find in more expensive ones. I highly recommend it

    Translated from Greek ·
    Did you find this review helpful?
  • 5
    1 out of 1 members found this review helpful

    Verified purchase

    So far, it does its job very well and, above all, reliably.

    Translated from Greek ·
    Did you find this review helpful?
  • Verified purchase

    Excellent multimeter for the money. There is also a very informative review on YouTube

    Translated from Greek ·
    • Construction quality
    • Accuracy in measurements
    • Value for money
    Did you find this review helpful?
  • I am very satisfied..!!

    Translated from Greek ·
    Did you find this review helpful?
  • Verified purchase

    Amazing multimeter, I am very satisfied.

    Translated from Greek ·
    Did you find this review helpful?
  • Verified purchase

    Fair for its price.

    Translated from Greek ·
    Did you find this review helpful?
  • 5
    0 out of 1 members found this review helpful

    Excellent for its price

    Translated from Greek ·
    Did you find this review helpful?
  • Excellent and expensive with the well-known quality of the company

    Translated from Greek ·
    Did you find this review helpful?
  • 5
    1 out of 1 members found this review helpful

    Verified purchase

    Although I don't know much, it seems to work well with many options

    Translated from Greek ·
    Did you find this review helpful?
  • Verified purchase

  • Verified purchase

  • Verified purchase

  • Verified purchase

  • For amateur use in sockets, microelectronics, and anything at home, and for the first time in 3 years, it's just fine.

    Translated from Greek ·
    1
  • The second one I buy, the first one fell from a 4-meter ladder and the crystal from the screen broke, it works normally but the first two digits are not visible.

    The voltage measurement is very fast compared to other multimeters that my colleagues have. In DC variable measurement, it captured almost 7-8 out of 10 values compared to colleagues who only captured 2-3.

    The rest of the features are purely for the tasks you need it for and the response speed is very good. I should add that my hands have handled faster multimeters, but at €50 its price is a steal.

    Translated from Greek ·
    2
  • Unfortunately, after 2 years, the temperature measurement stopped working, and after another 4, it stopped working completely, now showing hexadecimal digits on the screen.

    Translated from Greek ·
    1
  • It comes with a temperature sensor, a pair of connectors, and a protective rubber cover. I am a value for money purchase (for both amateur and professional use)

    Translated from Greek ·
    7
  • It is not a cheap construction, but neither is it top-notch. However, it is a quality tool with accurate measurements and very good value for money. It is worth its price.

    Translated from Greek ·
    5
  • See all
47,00 €
14,00 €   shipping cost