Extech EX505A Heavy Duty True RMS Multimeter

The Extech EX505A is a heavy duty True RMS digital multimeter engineered for demanding industrial and aviation maintenance environments. With a 6000-count backlit LCD, CAT IV-600V safety rating, and IP67-rated waterproof and dustproof housing, the EX505A is built to perform reliably in the harshest field conditions, whether that means exposure to jet fuel mist, hydraulic fluid, rain on a flight line, or the mechanical abuse of daily MRO use. Dual-sensitivity frequency measurement (electric 1kHz / electronic 10MHz), Type K thermocouple input up to 1400°F, and 2-meter drop protection make it a comprehensive diagnostic instrument for A&P mechanics, avionics technicians, and professional MRO electricians.

Key Features

• CAT IV-600V safety rating, highest classification for service entrance and primary distribution system measurements
• IP67-rated waterproof and dustproof housing for reliable operation in wet, dirty, and chemically exposed aviation environments
• True RMS measurement for accurate results on aircraft inverter, VFD, and variable-frequency AC bus circuits
• 6000-count backlit LCD with 0.5% basic accuracy for finer measurement resolution
• Dual-sensitivity frequency measurement: electric (1kHz) and electronic (10MHz) for broad-range frequency diagnostics
• Type K thermocouple input for temperature measurements up to 1400°F (-20°C to 760°C)
• 2-meter drop proof housing for durability in demanding hangar and field environments
• Double-molded test leads for extended service life

Specifications

• DC Voltage: up to 600V
• AC Voltage: up to 600V (True RMS)
• DC/AC Current: up to 10A
• Temperature (Type K): -20°C to 760°C (up to 1400°F)
• Frequency (Electric): up to 1kHz
• Frequency (Electronic): up to 10MHz
• Display: 6000-count backlit LCD
• Basic DCV Accuracy: ±0.5%
• True RMS: Yes
• Safety Rating: CAT IV-600V
• IP Rating: IP67 (Dustproof/Waterproof)
• Drop Proof: 2m (6.5 ft)

Applications

The EX505A heavy duty multimeter is purpose-built for aviation maintenance technicians, MRO electricians, and FBO ground crews who need a rugged, reliable digital multimeter capable of withstanding the physical and environmental demands of daily flight-line and hangar maintenance. Its CAT IV-600V and IP67 ratings make it one of the safest and most durable multimeters for use on aircraft primary electrical systems, ground power units, fuel system wiring, and hydraulic system diagnostics where moisture, contamination, and drop exposure are everyday realities. The dual-sensitivity frequency function and True RMS engine make it equally capable on avionics benches and as a field instrument for complex aircraft electrical troubleshooting.

Need Your Extech EX505A Calibrated?

• PJi operates an ISO/IEC 17025 Accredited Calibration Lab and provides NIST-traceable calibration for the Extech EX505A at purchase.
• Documentation satisfies FAA Part 145, ISO 9001, and AS9100 requirements.
• PJi is the one-stop source: instrument and certificate in one transaction.

Why Buy from Pilot John International?

• Pilot John International is an authorized Extech distributor with an in-house ISO/IEC 17025 Accredited Calibration Lab.
• One-stop source for Extech instruments and NIST-traceable calibration in a single transaction.
• We serve aviation maintenance, FAA Part 145 repair stations, and industrial MRO facilities.
• Full-catalog availability and same-business-day shipping on in-stock items.