Klein Tools produces some of the most trusted digital multimeters in the industry, and two models that often get compared are the Klein MM720 and the Klein MM700. While both are designed for professional use, they differ in accuracy, safety ratings, and advanced features. Let’s break them down so you can decide which one fits your needs best.
🔍 Overview of the Klein MM720
The Klein MM720 is one of Klein’s higher-end auto-ranging multimeters. It’s built with True RMS capability, advanced safety ratings, and features designed for electricians who deal with complex and noisy signals.
Key Features of the MM720:
- True RMS for accurate readings on non-linear loads
- Auto-ranging with manual range override
- Measures voltage, current, resistance, capacitance, frequency, and duty cycle
- Temperature measurement with included thermocouple
- Microamp range for flame sensor testing (HVAC-friendly)
- LoZ (Low Impedance) mode to eliminate ghost voltages
- Min/Max recording function
- CAT IV 600V / CAT III 1000V safety rating
Best For: Professional electricians, HVAC technicians, and industrial engineers who need accuracy and safety in high-demand environments.
⚡ Overview of the Klein MM700
The Klein MM700 is a professional-grade True RMS multimeter that emphasizes versatility. While it doesn’t have every advanced feature of the MM720, it’s still a robust tool with excellent accuracy and a slightly more straightforward design.
Key Features of the MM700:
- True RMS for precise readings
- Measures voltage, current, resistance, frequency, duty cycle, and temperature
- Low Impedance (LoZ) mode for eliminating ghost voltages
- Min/Max/Relative measurement functions
- CAT IV 600V / CAT III 1000V safety rating
- Rugged housing with drop protection
- Wide operating temperature range
Best For: Electricians and technicians who want a reliable, full-featured multimeter at a slightly lower price point than the MM720.
📊 Side-by-Side Comparison Table
| Feature | Klein MM720 | Klein MM700 |
|---|---|---|
| True RMS | ✅ Yes | ✅ Yes |
| Auto-Ranging | ✅ Yes | ✅ Yes |
| Voltage Range | Up to 1000V | Up to 1000V |
| Current Range | 10A (with microamps) | 10A |
| LoZ Mode | ✅ Yes | ✅ Yes |
| Temperature | ✅ Yes | ✅ Yes |
| Display | High-resolution, backlit | Standard backlit |
| Safety Rating | CAT IV 600V / CAT III 1000V | CAT IV 600V / CAT III 1000V |
| Min/Max Recording | ✅ Yes | ✅ Yes |
| Flame Sensor Microamps | ✅ Yes | ❌ No |
| Durability | Rugged design | Rugged, drop-tested |
| Best For | Pros needing microamps + HVAC | General electricians, industrial work |
✅ Pros and Cons of Each
Klein MM720 Pros:
- Microamp range for HVAC and flame sensors
- Higher display resolution
- True RMS and LoZ mode included
- CAT IV safety rating for maximum protection
Klein MM720 Cons:
- Pricier than the MM700
- Slightly bulkier design
Klein MM700 Pros:
- True RMS with LoZ for reliable results
- CAT IV / CAT III safety rating
- Rugged, professional-grade build
- Excellent value for the features
Klein MM700 Cons:
- Lacks microamp range
- Display is not as detailed as MM720
🏆 Verdict: Klein MM720 or MM700?
Both the Klein MM720 and MM700 are excellent True RMS multimeters designed for professionals.
- Choose the MM700 if you want a reliable, rugged, and affordable multimeter that covers most electrical and industrial needs.
- Choose the MM720 if you need extra precision, microamp functionality for HVAC work, and advanced features for complex troubleshooting.
👉 In short:
- MM700 = dependable and cost-effective professional tool.
- MM720 = advanced, versatile, and ideal for demanding environments.