When it comes to professional digital multimeters, two names come up often: Klein Tools and Fluke. The Klein MM720 is a higher-end model from Klein, while the Fluke 117 is a compact electrician’s favorite. Both are solid tools, but they target slightly different needs. Let’s compare them side by side.
📊 Side-by-Side Comparison Table
| Feature | Klein MM720 | Fluke 117 |
|---|---|---|
| True RMS | ✅ Yes | ✅ Yes |
| Auto-Ranging | ✅ Yes | ✅ Yes |
| LoZ Mode | ✅ Yes | ✅ Yes |
| Voltage Range | Up to 1000V | Up to 600V |
| Current Range | 10A + microamps | 10A |
| Temperature | ✅ Yes | ❌ No |
| Non-Contact Voltage | ❌ No | ✅ Yes (VoltAlert) |
| Display | High-resolution backlit | Backlit |
| Safety Rating | CAT IV 600V / CAT III 1000V | CAT III 600V |
| Size/Portability | Larger, rugged | Compact, easy to carry |
| Best For | Industrial, HVAC, demanding environments | Everyday electricians, commercial/residential |
🔍 Overview of the Klein MM720
The Klein MM720 is designed for advanced troubleshooting with features that appeal to electricians, HVAC technicians, and industrial engineers.
Key Features:
- True RMS for accurate readings on non-linear loads
- Auto-ranging with manual override
- Measures AC/DC voltage, current, resistance, capacitance, frequency, and duty cycle
- Temperature measurement with thermocouple
- Microamp range for HVAC flame sensor testing
- LoZ (Low Impedance) mode to eliminate ghost voltages
- Min/Max recording function
- CAT IV 600V / CAT III 1000V safety rating
Best For: Professionals who need a wide range of functions and maximum safety in demanding environments.
⚡ Overview of the Fluke 117
The Fluke 117 is one of the most popular electrician’s multimeters, known for its reliability, compact size, and everyday practicality.
Key Features:
- True RMS for accurate readings
- AutoVolt automatic AC/DC voltage selection
- VoltAlert non-contact voltage detection
- LoZ (Low Impedance) input to eliminate ghost voltages
- Measures voltage, current (10A), resistance, continuity, frequency, and capacitance
- Backlit display for low-light environments
- Ergonomic design with compact form factor
- CAT III 600V safety rating
Best For: Electricians working in residential, commercial, and light industrial settings who value speed, simplicity, and trusted performance.
✅ Pros and Cons of Each
Klein MM720 Pros:
- More advanced measurement capabilities
- Microamp range for HVAC work
- Temperature measurement included
- Higher safety rating (CAT IV)
Klein MM720 Cons:
- Bulkier design
- More expensive than basic models
Fluke 117 Pros:
- Compact and ergonomic design
- Non-contact voltage detection (VoltAlert)
- AutoVolt simplifies measurements
- Trusted Fluke accuracy and durability
Fluke 117 Cons:
- No temperature measurement
- Lower safety rating than MM720
- No microamp range for HVAC
🏆 Verdict: Which One Should You Choose?
Both the Klein MM720 and Fluke 117 are excellent meters, but they serve different roles.
- If you’re a field technician, HVAC specialist, or industrial electrician, the Klein MM720 offers more versatility with microamps, temperature, and a CAT IV rating.
- If you’re a general electrician working in residential or commercial settings, the Fluke 117 is a compact, reliable, and highly practical choice.
👉 In short:
- Choose the Klein MM720 for advanced troubleshooting and safety.
- Choose the Fluke 117 for everyday use and portability.