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True RMS Digital AC Clamp Meter UT201+ UNI-T
This digital AC clamp meter features True RMS and Auto-Ranging for fast, accurate readings without manual range settings. It measures AC current up to 400A, AC/DC voltage up to 600V and resistance, and includes non-contact voltage detection (NCV). Rated CAT II 600V / CAT III 300V, with a 28 mm jaw opening.
Accurate Current Measurement Without Breaking the Circuit
For electrical checks on panels, motors and residential or industrial installations, this clamp meter lets you measure current by simply clamping around the conductor, without opening the circuit, quickly and safely.
Key Features
- True RMS: delivers accurate AC current and voltage readings even on non-sinusoidal signals, such as those produced by inverters and modern electronics.
- Auto-Ranging: the meter selects the correct range automatically, reducing the risk of a wrong setting and speeding up every measurement.
- AC Current up to 400A: a 28 mm jaw opening for measuring current in cables and conductors without touching the conductor.
- Non-Contact Voltage Detection (NCV): detects the presence of voltage before you touch the conductor, adding an extra layer of safety.
- Additional Functions: continuity test with buzzer, diode test, Data Hold, MAX/MIN, a 4000-count backlit display and auto power-off.
Technical Specifications
| Type | Digital AC Clamp Meter |
| True RMS | Yes |
| Auto-Ranging | Yes |
| DC Voltage (Max) | 600 V |
| AC Voltage (Max) | 600 V |
| AC Current (Max) | 400 A (4 A / 40 A / 400 A) |
| DC Current | Not supported |
| Resistance | up to 40 MΩ |
| Continuity Test (Buzzer) | Yes |
| Diode Test | Yes |
| NCV (Non-Contact Voltage) | Yes |
| Jaw Opening | 28 mm |
| Display | 4000 counts, backlit |
| Safety Category (CAT) | CAT II 600V / CAT III 300V |
| Power Supply | 2 × AAA 1.5V batteries |
| Dimensions / Weight | 215 × 63.5 × 36 mm / approx. 248 g |
Frequently Asked Questions
What is True RMS and why do I need it?
True RMS (Root Mean Square) meters accurately measure AC current and voltage even when the signal is not a perfect sine wave, which is common with modern electronics and inverters.
Does this clamp meter measure DC current?
Clamp current measurement is AC only, up to 400A. DC voltage is measured normally up to 600V using the test leads.
What's in the Box:
- Test Leads – 1 pair
- Fabric carrying bag
- AAA batteries
- User manual
Safety tip: before every measurement, make sure the meter's safety category (CAT) covers the circuit you are working on, and avoid contact with bare conductors.