SKU: 40114853912

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: 40114853912

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cole maki
Charlottesville, US
★★★★★ 5
MacBook Air is amazing
Capacity: 16GB Unified Memory | 512GB SSD Storage, Color: Midnight, Set: Without AppleCare+
This is an amazing laptop battery life is amazing, it is slim and feels durable, it is super fast powering on and opens any application instantly and the keyboard feels great I love typing on it. All around I would never get a windows laptop with something as good as this
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Reviewed in the United States on April 8, 2026
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Amz Customer
Whiting, US
★★★★★ 5
Expensive, refined, and exactly what it should be
This is one of those products where there isn’t much to overthink it. The Apple Pencil Pro does exactly what it’s supposed to do, does it consistently, and integrates seamlessly with the iPad. It’s not cheap, and it doesn’t try to be revolutionary — it’s just very well executed. Performance and usability Responsiveness is excellent. There’s no noticeable latency, pairing is instant, and charging via the magnetic attachment is still one of the cleanest implementations Apple has ever done. You never think about battery life or connection issues — it just works. The new squeeze gesture is genuinely useful and makes switching tools faster without breaking flow. The tilt support is well implemented and will be especially appreciated by artists, even if it’s not something every user relies on heavily. Feel and design The build quality is exactly what you’d expect. It feels solid, balanced, and premium. That said, the writing feel is still very smooth-on-smooth, which isn’t particularly pencil-like. Screen protectors help with that, but out of the box it’s not a perfect analog feel. Color options are still nonexistent, which is a bummer but that’s always been the case. Compatibility and pricing Requiring the Pro model for newer iPads is frustrating, but not surprising. It’s clearly part of Apple’s broader product segmentation strategy. While that won’t sit well with everyone, the Pencil Pro itself delivers enough refinement that it doesn’t feel like a compromised purchase. Minor quirks On rare occasions, if the iPad hasn’t been used in a while, the Pencil may not immediately reconnect. Placing it back on the magnetic charger instantly resolves this, so it’s more of a momentary hiccup than a real issue. Final thoughts There’s nothing here that feels half-baked. You can nitpick price, texture, or ecosystem decisions, but in actual daily use, none of those detract meaningfully from the experience. The Apple Pencil Pro is reliable, polished, and purpose-built — which is exactly what most people want from it. Five stars - Expensive, but extremely refined. If you’re in the iPad ecosystem, this is the best stylus experience available
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Reviewed in the United States on January 13, 2026
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LB
San Leandro, US
★★★★★ 5
Great Apple Pencil
This Apple Pencil is great! I bought it to work with my new iPad Air 11” M4. It is perfectly compatible and connected without any difficulty. I love that it attaches magnetically to my iPad to charge and there’s no separate charger. It also pairs much more easily with my iPad than my previous Apple Pencil Pro. The material is smooth but not slippery, and comfortable to hold. The tips are durable and last a long time. The pencil is accurate and glides smoothly over the iPad screen, making it a pleasure to use, especially for drawing or painting. It is a good value for the money. I’m very pleased with this purchase and would definitely buy it again.
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Reviewed in the United States on May 16, 2026
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JusKolMeAl
Lexington, US
★★★★★ 5
Saved a few bucks for top quality!
I’m not a visual artist by any stretch, but I also hate not having every option at my disposal, so I bought this item used on here. The best $70 bucks I’ve ever saved. It didn’t come in an Apple box but it came in an Amazon box that was the size of an Apple box and it was padded and secure. The quality was as new as it would be coming from the Apple Store. It’s a pretty good device. It works well. I enjoy using it to make slight adjustments in my attempts to draw things and I do enjoy writing with it. Great weight and the haptics are on point when you use the options like squeezing it to change tools. It fits nicely on the top of the iPad with the magnet. Battery life has yet to drop below 95 even when I had it off the pad for a few days. I’m very happy with my purchase and I love the fact that I saved a few bucks by purchasing used.
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Reviewed in the United States on March 24, 2026
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Tammy
Lexington, US
★★★★★ 5
Excellent Apple Pencil but make sure it works with the iPad you currently own!
I love the new pencil! The haptics in it are great! I originally had the 2nd gen pencil and needed a new one so I bought this one. When I got it, it wouldn’t sync to my iPad Pro 11 (4th gen) though. Apparently I didn’t read completely that it wouldn’t. However, because of this, my husband bought me the new iPad Pro (M5 chip) and the pencil works great with it! It syncs easily with the iPad and is easy to use.
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Reviewed in the United States on April 29, 2026

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