Description
The Klein MM400 Digital Multi-Tester (Multimeter) is a professional auto-ranging electrical test instrument designed for accurate measurement and diagnostics in residential, commercial, and light-industrial environments. Developed by Klein Tools in the U.S.A., it is engineered by electricians for electricians, combining durability, safety, and time-saving functionality.
Key Benefits
- Auto-ranging multimeter for fast and accurate electrical measurements
- Measures voltage, current, resistance, temperature, capacitance, and frequency
- CAT III 600V safety rating for professional electrical work
Product Overview
The Klein Tools MM400 Multimeter is built for daily jobsite use, offering reliable measurement of AC/DC voltage and current, resistance, and advanced functions such as temperature, capacitance, frequency, duty-cycle, diode testing, and continuity. Its rugged housing is designed to withstand drops and regular wear, while the clear 4000-count LCD display ensures easy readability.
This multimeter is suitable for electricians, maintenance technicians, and service professionals requiring dependable diagnostics in controlled electromagnetic environments.
Ideal Applications
- Electrical installation and troubleshooting
- HVAC and maintenance diagnostics
- Residential, commercial, and light-industrial electrical testing
Technical Specifications
| Brand | Klein Tools |
| Model | MM400 |
| Display | 4000-count LCD |
| Safety Rating | CAT III 600V, CE Certified |
| Voltage | 600V AC / 600V DC |
| Current | 10A AC / 10A DC |
| Resistance | 40 M |
| Capacitance | 200 F |
| Frequency | 1 Hz 50 kHz |
| Temperature Range | 0 to 1000F (-18 to 538C) |
| Drop Protection | 3.3 ft (1 m) |
| Batteries | 2 AAA |
| Dimensions (L W H) | 6.00 in 3.16 in 1.78 in (15.2 8 4.5 cm) |
| Weight | 8.2 oz (231 g) |
Whats Included
- 1 Klein MM400 Digital Multimeter
- Test leads
- Thermocouple with adapter
- Batteries
- User manual
Learn more about our Warranty Policy or contact us for professional assistance.
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