UNI-T UT139S Electricians True RMS Digital Multimeter with EBTN Display

The UNI-T UT139S is a professional-grade multimeter built for electricians, maintenance technicians, and electronics hobbyists who demand accuracy and reliability. Featuring True RMS measurement, it delivers precise readings on non-sinusoidal waveforms from variable-frequency drives and switching power supplies. The LoZ (Low Impedance) function eliminates ghost voltage readings in high-capacitance systems, ensuring trustworthy diagnostics in complex electrical environments. The high-contrast EBTN black display offers excellent visibility in low-light conditions, while the 31-segment analog bar graph provides intuitive visual feedback on changing values. With a 6000-count display, built-in temperature measurement ranging from -40°F to 1832°F, a 10A current range, and a Low Pass Filter for cleaner signal readings, the UT139S handles everything from electrical installation and electronics repair to HVAC system diagnostics. Non-contact voltage detection adds an extra layer of safety during testing. Rated CAT III 600V / CAT IV 300V, this multimeter is engineered to perform across a wide range of professional applications with confidence and precision.