Rated CAT III 1000 V / CAT IV 600 V, the UT171B is a 60,000-count True-RMS multimeter built for plant and process work. The high count resolves small changes other meters round off, True-RMS keeps AC readings accurate on the distorted waveforms around drives and switching loads, and a high-contrast EBTN display stays readable on a plant floor.
It covers DC voltage to ±(0.025%+5), AC and DC current to 10 A, resistance, capacitance, frequency to 10 MHz, and temperature to 1000 ℃, with non-contact voltage detection and storage for 9999 readings. A 7.4 V rechargeable Li-ion pack and 1 m drop rating suit daily field use. It's backed by UNI-T's nearly 40 years of test-meter manufacturing.
Key Features
60,000-count resolution with high-contrast EBTN display
True-RMS AC voltage and current
DC voltage accuracy ±(0.025%+5); AC bandwidth to 100 kHz
AC/DC current to 10 A; resistance to 60 MΩ, capacitance to 60 mF
Frequency to 10 MHz; temperature −40 ℃ to 1000 ℃
Non-contact voltage (NCV) detection
Low-impedance (LoZ) ACV mode to reject ghost voltages
9999-reading storage
CAT III 1000 V / CAT IV 600 V; 1 m drop; rechargeable Li-ion
UT171B Details
60,000-Count True-RMS Measurement
The 60,000-count display resolves fine detail across the range, and True-RMS sensing keeps AC voltage and current accurate on the non-sinusoidal waveforms common around variable-frequency drives and electronic loads — where average-responding meters read low.
Industrial Accuracy & Bandwidth
DC voltage accuracy of ±(0.025%+5) and 100 kHz AC bandwidth cover precise troubleshooting and signal work, with resistance to 60 MΩ, capacitance to 60 mF, frequency to 10 MHz, and thermocouple temperature to 1000 ℃.
Safe Measurement Features
Non-contact voltage detection flags live conductors before you probe, and a low-impedance ACV mode loads out induced ghost voltages so a de-energized circuit reads as dead. The CAT III 1000 V / CAT IV 600 V rating covers distribution-level work.
Field Build
An EBTN display holds contrast at wide angles and in bright light, a 7.4 V 2000 mAh rechargeable pack runs long shifts, and a 1 m drop rating handles the knocks of plant use.
Compare the UT171 Series
UT171B
UT171C
Display
EBTN
OLED
Square-wave output
—
Yes
Non-contact voltage (NCV)
Yes
—
Applications
Plant and process troubleshooting; motor-drive and control-panel work where True-RMS and LoZ matter; commissioning and preventive maintenance; and bench or field measurement that needs 60,000-count resolution.
Frequently Asked Questions
What does 60,000-count resolution give me?
Finer reading detail than a typical 6,000-count meter — small changes that would otherwise be rounded off stay visible.
Is the UT171B True-RMS?
Yes — AC voltage and current are True-RMS, accurate on distorted waveforms around drives and electronic loads.
How does the UT171B differ from the UT171C?
The UT171B uses an EBTN display and includes NCV; the UT171C uses an OLED display and adds a square-wave output. Core measurement performance is the same.
⚠️ WARNING (California Proposition 65): This product may contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, please visit www.P65Warnings.ca.gov.
