Extech EX840A True RMS 1000A AC/DC Clamp Meter with IR Thermometer

When electrical troubleshooting demands high current measurements and non-contact temperature readings in one tool, the Extech EX840A delivers. This digital clamp meter combines True RMS AC/DC current up to 1000 A with an integrated IR thermometer and Type K thermocouple input, all in a rugged CAT IV 600 V rated housing.

Who is it for

Electricians, HVAC technicians, and industrial maintenance professionals who need a versatile meter for high-energy environments. The 43 mm jaw opening accommodates large conductors, while the built-in IR thermometer adds quick surface temperature checks without switching tools.

Main features

• True RMS AC/DC clamp meter for accurate readings on non-linear loads
• Measures up to 1000 A AC/DC current and 1000 V AC/DC voltage
• Integrated IR thermometer with -50 to 270°C range and Type K input up to 1000°C
• 4000-count backlit display with auto ranging and data hold
• Min/Max/Peak hold and non-contact voltage detection
• CAT IV 600 V, CAT III 1000 V safety rating for industrial use

Specifications

• AC/DC current: 1000 A
• AC/DC voltage: 1000 V
• Resistance: 40 MΩ
• Capacitance: 40 mF
• Frequency: 4 kHz (ACV/ACA), 400 kHz (Logic)
• IR temperature: -50 to 270°C
• Type K temperature: -50 to 1000°C
• Display counts: 4000
• Jaw opening: 43 mm
• Safety: CAT IV 600 V, CAT III 1000 V

Tips

Use the non-contact voltage detector to quickly check for live circuits before clamping. For temperature measurements, the IR thermometer is ideal for hot spots, while the Type K probe provides contact accuracy on pipes or motors.