Since 1910, General Tools has grown to become a recognized industry leader for specialty hand tools and instruments. The DMM550 is ideal for use in an industrial setting by HVAC/R contractors, building maintenance technicians, MRO (maintenance, repair and operations) personnel at process and power plants, electricians and electrical/electronic technicians. It resists damage from falls from up to 6 ft. and includes a non-contact voltage (NCV) detector and a thermocouple probe.

California residents: see   Proposition 65 information

• 18 functions, 48 ranges
• Measures AC/DC voltage, AC/DC current, resistance, capacitance, frequency and duty cycle
• Also measures temperature from -58-degree to 1112-degreeF using “K” type thermocouple probe
• Checks continuity and diode integrity
• True RMS measurements
• Designed to meet CAT III 1000-Volt, CAT IV 600-Volt safety standard
• Auto or manual ranging
• 110-Volt AC non-contact voltage (NCV) detector
• AC voltage measurement range/accuracy: 0 to 1000-Volt/±1.5% (typical)
• DC voltage measurement range/accuracy: 0 to 1000-Volt/±0.5% (typical)
• AC/DC current measurement range/accuracy: 0 to 10 Amp/±1.5% (typical)
• Resistance measurement range/accuracy: 0 to 40MΩ/±0.8% (typical)
• Frequency measurement range/accuracy: 10Hz to 40 MHz/±1.5% of reading
• Capacitance measurement range/accuracy: 0 to 40mF/±3% of reading (typical)
• Temperature measurement range/accuracy: 32-degree to 1832-degreeF/±1% of reading
• Backlit 3-1/2 digit (4000 count) dual readout LCD with 40-segment analog bar graph
• Hold, max, min, reel (zero) display options
• Includes cloth pouch with belt loop, double-insulated test leads with screw-on alligator clips, “K” type thermocouple probe and plug adaptor, 3-year limited warranty and user’s manual