UT 39+ Series
The UT 39+ Series by UNI‑T offers reliable, field-ready measurement solutions designed for technicians, engineers, and HVAC professionals. They combine industrial-grade safety—compliant with CAT II 1000 V and CAT III 600 V—with robust drop-resistance for heavy-duty use.
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High-voltage DC/AC measurement (up to 1000 V/750 V)
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Current measurement up to 10 A DC/AC
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Resistance, capacitance, frequency, and hFE transistor testing
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Diode and continuity tests, manual range, data hold, automatic shutoff, and backlight.
Model-specific features:
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UT39C+: built-in temperature measurement (–40 °C to 1000 °C, K-probe included) ideal for HVAC diagnostics.
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UT39E+: upgraded to a 20000-count display, adds conductance (nS) and enhanced resolution for electronics design.
The series also integrates overvoltage/current protection and alarms to help prevent damage from misuse.
🛠 Technical Specifications
| Function | UT39A+ / UT39C+ / UT39E+ |
|---|---|
| DC Voltage | 200 mV–1000 V ±(0.5%+5) |
| AC Voltage | 2 V–750 V ±(0.8%+3) |
| DC Current | μA–10 A ±(0.8%+3) |
| AC Current | μA–10 A ±(1%+2) |
| Resistance | up to 200 MΩ ±(0.8%+1) |
| Capacitance | up to 10 mF ±(4%+5) |
| Frequency | 40 Hz–400 Hz |
| Temperature (UT39C+) | –40 °C–1000 °C ±(3%+10) |
| Conductance (UT39E+) | 0.1–100 nS |
| Display Count | 4000 (A+/C+), 20000 (E+) |
| Safety Rating | CAT II 1000 V / CAT III 600 V |
| Features | hFE, diode, continuity, data hold, backlight |
| Protection | Overvoltage / overcurrent alarm |
| Size & Weight | 175 × 83 × 53 mm / ~330 g |
⚠️ Precautions & Tips
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Use included K-type probe for temperature on UT39C+.
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Replace batteries promptly to maintain protection features.
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Keep the overvoltage alarm active—it catches accidental range misuse.
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Clean the input jacks and maintain the casing after 2 m drop incidents.
💡 Use Cases & Applications
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Electrical HVAC testing – UT39C+ monitors line voltages and thermal diagnostics.
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Power system inspection – High voltage capability supports up to 1000 V checks safely.
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Electronics R&D – UT39E+ is great for component-level work with its 20 k count resolution.
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Maintenance & repair benches – HFE testing, diode/continuity checks for circuit boards.
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Field service kits – Rugged drop-proof design and overvoltage alerts are ideal for outdoor jobs.
🎥 YouTube Tutorial
🏁 Conclusion & Value Proposition
Whether you need HVAC temperature reading, high-resolution electronic testing, or safe high-voltage work, the UT 39+ Series delivers protection, precision, and practical features in a palm-size form. Built to withstand tough environments—these multimeters are trusted tools for professionals.
Available now at Electroway—empower your toolkit with UT 39+ dependability.
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