Extech EX623A True RMS Digital Clamp Meter with IR Thermometer, CAT III 600V, 400A AC/DC

Electrical technicians and HVAC professionals rely on the Extech EX623A for comprehensive troubleshooting in one tool. This True RMS clamp meter measures AC/DC current up to 400A, AC/DC voltage up to 600V, resistance, capacitance, frequency, and temperature via built-in IR thermometer and Type K thermocouple input. The 4000-count display with backlight ensures clear readings in dim environments. Non-contact voltage detection and continuity beeper add safety and convenience. Auto power off preserves battery life. CAT III 600V safety rating makes it suitable for distribution panel measurements.

Key specifications

• AC/DC current: 0.1A to 400A
• AC/DC voltage: 0.1mV to 600V
• Resistance: 0.1Ω to 40MΩ
• Capacitance: 0.001nF to 40mF
• Frequency: 0.001Hz to 40MHz
• IR temperature: -50 to 270°C (-58 to 518°F)
• Type K temperature: -20 to 760°C (-4 to 1400°F)
• Display counts: 4000
• Jaw opening: 30 mm (1.2")
• Safety rating: CAT III 600V
• Power source: 3 x AAA batteries

Why choose it

Combines electrical and temperature measurement in one rugged device, reducing the need for multiple tools. True RMS ensures accurate readings on non-linear loads. The built-in IR thermometer allows non-contact temperature checks, while the Type K input extends range for contact measurements. Min/Max and data hold functions capture transient events.

Ideal use cases

• HVAC system diagnostics
• Industrial electrical maintenance
• Motor and transformer testing
• Residential and commercial panel checks

Good to know

Auto power off conserves battery life. The 30mm jaw accommodates large conductors. Continuity beeper and diode test are included. NCV detector provides quick voltage presence indication.