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UNI-T UT139E True RMS auto ranging digital multimeter straight front view,6000-count LCD,LoZ,LPF,℃/℉,MHz,NCV,REL,MAX/MIN & CAT III 600V safety input terminals

Complete retail bundle of UNI-T UT139E multimeter, original color box, test leads, thermocouple wire, user manual and factory AAA batteries

Upright straight front full detail view of UNI-T UT139E multimeter with full marked function symbols on black front panel

Right side vertical slanted view of UNI-T UT139E red wrapped multimeter, slim compact body outline display

Full rear back view of UNI-T UT139E multimeter, closed battery cover and dual kickstand clamping slots on red rear casing

Left oblique shot of UNI-T UT139E multimeter propped upright by unfolded built-in rear black kickstand, red rubber outer casing

Split product shot of UT139E multimeter black core main unit detached from independent red removable protective rubber sleeve

Features & Details

⚡ TRUE RMS

Accurately measures distorted AC voltage and current waveforms in noisy environments flawlessly.

🎛️ VFC FILTER

Filters out high-frequency interference natively. Therefore, it reads variable frequency drives with extreme precision safely.

🛡️ CAT III 600V

Operates safely in heavy-duty industrial environments smoothly. Features full-range input and overvoltage protection.

⚖️ 4 VARIANTS

Choose the perfect model seamlessly. Ranges from the basic UT139A up to the ultimate 6000-count UT139E pro meter.

About this item

Product specification

Attribute

UNI-T UT139 Series Technical Specifications

General Information & Material

Brand Name

UNI-T (Distributed by Xin Tester)

Product Type

Auto-Ranging True RMS Digital Multimeter Series

Safety Rating

CAT III 600V (Double Insulation Protective Holster)

Measurement Parameters & Display

DC / AC Voltage

Up to 600V (with VFC low-pass filter mode activated)

Display Counts

1999 (UT139A) / 3999 (UT139B/C) / 6000 (UT139E Pro)

Temp Range (UT139C)

-40°C to 1000°C (-40°F to 1832°F) via external probe

Physical Properties & Accessories

Dimensions (H x W x D)

170 × 80 × 48 mm (6.69 × 3.15 × 1.89 inches)

Device Weight

Approx. 354 g (12.49 oz) including standard battery pack

Package Contents

UT139 Multimeter, Premium Test Leads, User Manual, Batteries (UT139C includes Temp Probe)

The Professional Auto Ranging Multimeter

Electricians need highly reliable tools for complex electrical diagnostics daily. Therefore, UNI-T introduces the UT139 series auto ranging multimeter. We engineered this robust device to handle harsh industrial environments safely. Consequently, you can measure noisy electrical signals without losing accuracy. Furthermore, the ergonomic rubber casing ensures comfortable handling during long maintenance shifts.

Select Your Perfect Model

We offer four unique variants. Please review the key differences before adding to your cart.

UT139A (Basic)

1999 Display Counts
VFC & NCV Functions
Battery Test Mode

UT139B (Standard)

3999 Display Counts
VFC & NCV Functions
Wider Capacitance Range

UT139C (HVAC)

3999 Display Counts
VFC & NCV Functions
Temperature Probe

UT139E (Pro)

6000 Display Counts
LPF (Low Pass Filter)
LoZ (Low Impedance)

📏

Flawless True RMS Technology

Average-responding meters fail to measure non-linear loads accurately. Consequently, we integrated a sophisticated True RMS chip into this auto ranging multimeter securely. It measures distorted AC waveforms generated by modern electronics perfectly. Ultimately, this prevents costly diagnostic errors.

🎛️

VFC Frequency Conversion Mode

Industrial motors produce severe high-frequency interference continuously. Therefore, we equipped this tester with a VFC (Variable Frequency Control) function natively. It engages a low-pass filter to block electrical noise safely. As a result, you get stable readings instantly.

⚡

NCV Non-Contact Verification

You must verify circuit status before starting any repair work safely. The built-in NCV sensor detects live voltage safely through wire insulation. It triggers visual and auditory alarms immediately. Therefore, it protects you from hidden electrical hazards.

🛡️

CAT III 600V Safety Rating

We built this instrument to withstand massive transient overvoltage spikes. It complies strictly with CAT III 600V safety standards and double insulation requirements. Additionally, the thick rubber holster protects the meter from accidental drops effortlessly.

💡

Tech Insight: True RMS and Measurement Standards

Variable Frequency Drives (VFDs) control industrial motors efficiently. However, they generate intense electrical noise that confuses standard testing equipment completely.

By utilizing this advanced auto ranging multimeter with a VFC filter, you block this high-frequency interference effectively. This ensures your readings align with rigorous scientific accuracy. To explore advanced measurement and calibration standards, we highly recommend visiting the NIST official calibration and measurement hub.

Complete Your Electrical Toolkit

Every UT139 package includes the multimeter, premium test leads, batteries, and a comprehensive manual. The UT139C model also includes a temperature probe.

Do you need instruments for high-current applications?
Browse our professional clamp meters |
Contact sales for bulk orders

Product guides and documents

UT139E User Manual (PDF)

Use Cases

Home DIY & Repair Non-Contact Testing Pocket Size Portable True RMS Measurement

FAQs

Q1: What is the main difference between the UT139C and the UT139E?

A1: The UT139C features a 3999-count display and includes a temperature probe. Conversely, the UT139E is our premium 6000-count model. Furthermore, the UT139E includes an advanced Low Pass Filter (LPF) and a Low Impedance (LoZ) mode to eliminate ghost voltages perfectly.

Q2: How does the VFC function help me during diagnostics?

A2: VFC stands for Variable Frequency Control. When you activate it, the meter engages an internal low-pass filter. Consequently, it blocks high-frequency electrical noise generated by variable speed motor drives, ensuring your voltage readings remain perfectly accurate.

Q3: Does the basic UT139A model measure temperature?

A3: No, the UT139A does not include a temperature probe. However, it features a highly useful 1.5V and 9V battery testing mode. If you specifically need temperature testing for HVAC work, we highly recommend choosing the UT139C model.

Q4: Is it safe to use this multimeter on industrial power panels?

A4: Yes, absolutely. We engineered the entire UT139 series to meet strict CAT III 600V safety ratings. Additionally, it features full-range 600V input protection. Therefore, it shields you from sudden transient overvoltage spikes safely and reliably.

Auto Ranging Multimeter, UNI-T UT139 Series True RMS 600V Tester (UT139A/B/C/E)

Name: Auto Ranging Multimeter | UNI-T UT139 Series 600V
Brand: UNI-T
Availability: InStock

Price range: $54.99 through $75.99

Extra 5% Off with code: welcome5

color

Clear

6–12 Month Warranty

Repair & Refund support available for most products.

Free Worldwide Shipping

Ships within 3 business days.

Taxes & Duties

Buyer responsible for local import fees.

24/7 After-Sales Support

Technical assistance & video guidance within 24h.