SKU: 47822364033

UNI-T UT139C True RMS Digital Multimeters Circuit Board Fault Testing

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Description

UNI-T UT139C True RMS Digital Multimeters Circuit Board Fault TestingUNI T UT139C True RMS Digital Multimeters, UT139 Series UT139A UT139B UT139C digital multimeters for phone circuit board repair, LCR Meter Handheld Tester Multimetro Ammeter Multitester for phone Diagnostic Repair Tool. UT139 Series: UT139A UT139B UT139C digital multimeters are newly designed to offer users better performance and higher safety rating. Totally over load protection and unique structural design make it new type of multimeter with high

UNI-T UT139C True RMS Digital Multimeters, UT139 Series UT139A / UT139B / UT139C digital multimeters for phone circuit board repair, LCR Meter Handheld Tester Multimetro Ammeter Multitester for phone Diagnostic Repair Tool.

UT139 Series: UT139A / UT139B /UT139C digital multimeters are newly designed to offer users better performance and higher safety rating. Totally over-load protection and unique structural design make it new type of multimeter with high performance/ price ratio and a best choice for electricians used in electrical maintenance and repairing.

Features:
1. True RMS for the whole series;
2. Measure signals with varied frequency (VFC);
3. Measure large capacitance up to 100mF;
4. Optional AC/DC 60A current clamps in different models to measure current up to 60A (1mv=1A);
5. NCV designed for the whole series, a necessity for electricians;
6. AA1.5V*2(5#) battery, easy for users to purchase and replace;
7. Soft rubber holster is easy to stand 2m drop;
8. Optional magnetic hanging strap offered to facilitate tests in special location;
9. Fast to replace fuse, just by opening battery cover;
10. Reliable with use of internal 2PCS fuses with high-breaking capacity;
11. Protection against 600V input/1 minute from mis-connection;
12. Safety Rating: CAT III 600V.

Optional Models:
Option 1: UT139A
Option 2: UT139B
Option 3: UT139C

Specifications Range Best Accuracy
Model   UT139C
DC Voltage (V) 60mV/600mV/6V/60V/600V ±(0.5%+2) 
AC Voltage (V) 60mV/600mV/6V/60V/600V ±(0.8%+3) 
DC Current (A) 600μA/6000μA/60mA/600mA/6A/10A ± (0.7%+2) 
AC Current (A) 600μA/6000μA/60mA/600mA/6A/10A ±(1%+3)
Resistance (Ω) 600Ω/6kΩ/60kΩ/600kΩ/6MΩ/60MΩ ±(0.8%+2) 
Capacitance (F) 9.999nF/99.99nF/999.9nF/9.999μF/99.99μF/
999.9μF/9.999mF/99.99mF
 ±(4.0%+5)
Frequency (Hz) 10Hz-10MHz ±(0.1%+4) 
Temperature (°C) -40 °C~1000°C ±(1.0%+3) 
Temperature (°F) -40°F~1832°F ±(1.5%+5)
Features
Display Count   6000
Auto Range   √  
Manual Range   √  
True RMS   √  
Bandwidth (Hz)   45Hz ~1kHz
V.F.C   √  
Duty Cycle 0.1% ~ 99.9%  √  
Diode   Around 3V
NCV   √  
Auto Power Off Around 15 Minutes √  
Continuity Buzzer   √  
Low Battery Indication ≤2.5V √  
Data Hold   √  
Relative Mode   √  
MAX/MIN   √  
LCD Backlight   √  
Input Protection 600Vrms √  
Input Impedance for DCV 1GΩ Max √  


Applications

    An ideal tool for equipment testing, maintenance and repair widely needed in electronics, electric power, schools, metallurgy, communications, manufacturing, petroleum, national defense, chemical industry, etc.

Specifications Range Best Accuracy
Model   UT139A UT139B UT139C
DC Voltage (V) 20mV/200mV/2V/20V/200V/600V ±(0.5%+2)     
40mV/400mV/4V/40V/400V/600V   ±(0.5%+2)   
60mV/600mV/6V/60V/600V     ±(0.5%+2) 
AC Voltage (V) 20mV/200mV/2V/20V/200V/600V ±(1%+3)     
40mV/400mV/4V/40V/400V/600V   ±(0.8%+3)   
60mV/600mV/6V/60V/600V     ±(0.8%+3) 
DC Current (A) 200μA/2000μA/20mA/200mA/2A/10A ± (0.7%+2)     
400μA/4000μA/40mA/400mA/4A/10A   ± (0.7%+2)   
600μA/6000μA/60mA/600mA/6A/10A     ± (0.7%+2) 
AC Current (A) 200μA/2000μA/20mA/200mA/2A/10A ±(1%+3)     
400μA/4000μA/40mA/400mA/4A/10A   ±(1%+3)   
600μA/6000μA/60mA/600mA/6A/10A     ±(1%+3)
Resistance (Ω) 200Ω/2kΩ/20kΩ/200kΩ/2MΩ/20MΩ ±(1.0%+2)     
400Ω/4kΩ/40kΩ/400kΩ/4MΩ/40MΩ   ±(0.8%+2)   
600Ω/6kΩ/60kΩ/600kΩ/6MΩ/60MΩ     ±(0.8%+2) 
Capacitance (F) 9.999nF/99.99nF/999.9nF/9.999μF/99.99μF/
999.9μF/9.999mF/99.99mF
   ±(4.0%+5)  ±(4.0%+5)
Frequency (Hz) 10Hz-10MHz   ±(0.1%+4)  ±(0.1%+4) 
Temperature (°C) -40 °C~1000°C     ±(1.0%+3) 
Temperature (°F) -40°F~1832°F     ±(1.5%+5)
Features
Display Count   2000 4000 6000
Auto Range   √   √   √  
Manual Range   √   √   √  
True RMS   √   √   √  
Bandwidth (Hz)   45Hz ~400Hz 45Hz ~1kHz 45Hz ~1kHz
V.F.C   √   √   √  
Duty Cycle 0.1% ~ 99.9%    √   √  
Diode   Around 2V Around 3V Around 3V
NCV   √   √   √  
Battery Test 1.5V / 9V √      
Auto Power Off Around 15 Minutes √   √   √  
Continuity Buzzer   √   √   √  
Low Battery Indication ≤2.5V √   √   √  
Data Hold   √   √   √  
Relative Mode   √   √   √  
MAX/MIN   √   √   √  
LCD Backlight   √   √   √  
Input Protection 600Vrms √   √   √  
Input Impedance for DCV 1GΩ Max √   √   √  


Package list:
    
1 * UNI-T UT139C True RMS Digital Multimeters    
2 * Test Leads    
1 * Temperature Probe    

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 47822364033

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Junior Segura
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★★★★★ 5
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I've been using this Hiearcool USB-C hub with my MacBook for work and daily use, and it does exactly what it promises. All the ports work well (HDMI, USB, SD card, and charging), and it's very convenient for office and travel. At one point, I had an issue under regular use and contacted their support. They were responsive and helpful, and they assisted me quickly with a solution, which I really appreciated. Overall, it's a solid hub for the price, reliable, and backed by good customer service. I'd definitely recommend it.
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Reviewed in the United States on January 4, 2026
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Ari G.
Lexington, US
★★★★★ 4
NOKIA OF USB C HUBS
Color: Space grey
Howdy y’all, the only reason I’m doing a four star review is to keep it real. The only annoying thing with the adapter when you plug it in kind of flops goes all over the place, but that is easily remedied by how useful it is. I’ve worked at Best Buy. I study software. I like my tech to be reliable and last, this adapter has not disappointed me the last almost 4 years now! It looks the same as pictured, maybe a couple scratches now but it has held up incredibly well. I initially got so I can connect my monitor and my mouse to my MacBook Pro and that continues to be my main use for it. I’ve discovered it also works great at connecting to my iPad Air for extending the screen, mirroring, or using my mouse. It also works great for transferring data to other USB-C compatible devices like a Samsung phone! This thing has been reliable, I’ve used it to connect to external storage drives, SD cards, microSD cards. I keep finding new uses for it. It practically lives in my work bag all the time now. Also, I’ve only had it get somewhat warm like probably 2-3 times in my entire time of using it. The reason I come back to review after all these years is my younger sibling asked if they could have my adapter and I’ve never felt so firmly in saying absolutely not. I’m grateful that you can still buy this because a lot of things I’ve purchased on Amazon haven’t lasted. When you find something good like this, especially in this day where things are built to break, you can’t help but appreciate the things that are reliable and consistent.
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Reviewed in the United States on May 27, 2026
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Jeff & LaToya
Charlottesville, US
★★★★★ 5
Outstanding device
Color: Space grey
I use this instead of a docking station, it works extremely well on my HP laptop.
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Reviewed in the United States on May 27, 2026
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Pat OBrien
Cuba, US
★★★★★ 5
Good addition to a MacBook Pro
Color: Space grey
Works great, adds a lot of versatility to my laptop.
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Reviewed in the United States on May 14, 2026
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Nicole Hope
Lake Worth, US
★★★★★ 5
Cheaper and easy to use.
Color: Space grey
Best thing I could buy for my MacBook Air. Super helpful and takes up minimal space when using. Connection is very sturdy when using and the speed when transferring things is phenomenal.
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