Extech EX330 multímetro digital, 4000 contagens, CAT III 600V, True RMS, autorange

Electricians, HVAC technicians, and electronics hobbyists use the Extech EX330 on service calls and bench work to measure voltage, current, resistance, capacitance, frequency, and temperature. This compact auto-ranging multimeter fits in one hand and delivers True RMS accuracy for reliable readings on both linear and non-linear loads.

Key specifications

• Display: 4000 counts with backlight
• Safety rating: CAT III 600V
• True RMS: Yes
• Auto-ranging: Yes
• DC voltage: 0.1 mV to 600 V
• AC voltage: 0.1 mV to 600 V
• DC current: 0.1 µA to 10 A
• AC current: 0.1 µA to 10 A
• Resistance: 0.1 Ω to 40 MΩ
• Capacitance: 0.01 nF to 100 µF
• Frequency: 0.001 Hz to 10 MHz
• Temperature (Type K): -20 to 750°C (-4 to 1400°F)
• Diode test: Yes
• Continuity test: Yes (audible beeper)
• Data hold: Yes
• Min/Max function: Yes
• Auto power off: Yes
• Power source: 2 x AAA batteries
• Calibration: Factory standard (without certificate)

Why choose it

The EX330 combines essential measurement functions with True RMS accuracy and a backlit display, making it suitable for troubleshooting in dimly lit panels or tight spaces. Its auto-ranging feature reduces setup time, and the Min/Max function helps capture signal fluctuations.

Ideal use cases

• Electrical installation and maintenance
• HVAC system diagnostics
• Appliance repair
• Electronics testing and hobby projects

Good to know

The meter is calibrated to factory standards without a certificate. It operates on two AAA batteries and includes auto power off to conserve battery life.