What is the UT139S multimeter?
The UT139S is built for electricians and serious DIYers who need reliability on every job. From fault finding to voltage checks, this multimeter delivers precise, easy-to-read results—even in low light.
Table of contents
Key features
Get fast, accurate readings with smart safety features—great for everything from home sockets to switchboards.
- ✅ True RMS readings for accurate measurements in real-world conditions
- ✅ Detects ghost voltages with LoZ ACV mode
- ✅ NCV function checks voltage without contact
- ✅ 6000 count display with bar graph for detailed feedback
- ✅ MAX/MIN/REL modes for tracking signal changes
- ✅ Auto/manual range selection for control and ease
- ✅ Built-in LED backlight and auto power-off to save battery
- ✅ Full input protection rated to CAT III 600V