UNI-T UT202R True RMS Digital Clamp Meter 400A AC/DC Voltage Resistance Capacitance Frequency Temperature NCV

Electrical troubleshooting demands accurate, safe current measurement without breaking the circuit. The UNI-T UT202R clamp meter solves this by letting you measure AC current up to 400A simply by clamping around a conductor. True RMS technology ensures precise readings even on non-sinusoidal waveforms, while the 4000-count display and auto-ranging simplify your work. Whether you're an electrician, HVAC technician, or DIY enthusiast, this meter provides the essential functions you need in a compact, rugged design.

Who is it for

Professionals and hobbyists who need a reliable, portable clamp meter for electrical maintenance, troubleshooting, and installation. Ideal for electricians, HVAC technicians, automotive electricians, and home users working on single or three-phase systems.

Main features

• True RMS measurement for accurate AC current and voltage on distorted waveforms
• 400A AC current capability with 28mm jaw opening for conductors up to 28mm diameter
• Measures AC/DC voltage, resistance, capacitance, frequency, and temperature (with K-type thermocouple, not included)
• Non-contact voltage (NCV) detection for quick safety checks
• Data hold, backlight, auto power off, and low battery indication for convenience
• Safety rated CAT II 600V / CAT III 300V

Specifications

• Display: 4000 counts, backlit
• AC Current: 40A / 400A (±2.5%+5)
• AC Voltage: 4V / 40V / 400V / 600V (±1.2%+5)
• DC Voltage: 400mV / 4V / 40V / 400V / 600V (±0.8%+1)
• Resistance: 400Ω / 4kΩ / 40kΩ / 400kΩ / 4MΩ / 40MΩ (±1.0%+2)
• Capacitance: 4nF / 40nF / 400nF / 4µF / 40µF / 400µF / 4mF (±4.0%+3)
• Frequency: 10Hz ~ 10MHz (±0.1%+3)
• Temperature: -40°C ~ 1000°C / -40°F ~ 1832°F (±1.0%+3)
• Jaw Opening: 28mm
• Power: 2 x 1.5V AAA batteries (included)
• Dimensions: 210mm x 75mm x 30mm
• Weight: 200g (without batteries)
• Safety: CAT II 600V, CAT III 300V

Tips

For best accuracy, center the conductor in the jaws and avoid measuring near strong magnetic fields. Use the NCV function to quickly check for live wires before working. Replace batteries when the low battery indicator appears to maintain measurement precision.