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Klein MM720 vs Amprobe AM-570: A Head-to-Head Comparison

When it comes to professional-grade digital multimeters, two models that often get compared are the Klein Tools MM720 and the Amprobe AM-570.

Klein Tools MM420 Digital Multimeter, Auto-Ranging TRMS Multimeter, 600V AC/DC Voltage, 10A AC/DC Current, 50 MOhms Resistance

Both are True RMS meters designed for electricians and technicians, but they differ in features, safety ratings, and usability. Let’s break them down.

πŸ“Š Comparison Table

FeatureKlein MM720Amprobe AM-570
True RMSβœ… Yesβœ… Yes
Auto-Rangingβœ… Yesβœ… Yes
Voltage RangeUp to 1000VUp to 1000V
Current Range10A + microamps10A + microamps
Temperatureβœ… Yesβœ… Yes
LoZ Modeβœ… Yes❌ No
DisplayHigh-resolution backlitBacklit
Min/Max Recordingβœ… Yesβœ… Yes (with Peak Hold)
Safety RatingCAT IV 600V / CAT III 1000VCAT IV 600V / CAT III 1000V
Specialized HVAC UseMicroamps + TemperatureMicroamps + Temperature
BuildRugged Klein designRugged Amprobe housing
πŸ’³ PricingπŸ’² Check PriceπŸ’² Check Price

πŸ” Overview of the Klein MM720

The Klein MM720 is a versatile, rugged multimeter aimed at professional electricians and HVAC technicians. It’s designed to handle demanding environments with a strong safety rating and useful functions.

Klein Tools MM720 Digital Multimeter, Auto-Ranging TRMS, Low Impedance (LoZ), 1000V AC/DC Voltage, 10A AC/DC Current, 60 MOhms Resistance

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Key Features:

  • True RMS for accurate readings on non-linear loads
  • Auto-ranging with manual override option
  • Measures AC/DC voltage, current (10A + microamps), resistance, capacitance, frequency, and duty cycle
  • Temperature measurement with thermocouple
  • LoZ (Low Impedance) mode to eliminate ghost voltages
  • Min/Max recording for fluctuating signals
  • High-resolution backlit display
  • CAT IV 600V / CAT III 1000V safety rating

Best For: Professionals working in HVAC, industrial, and electrical troubleshooting who need precision and safety.

⚑ Overview of the Amprobe AM-570

The Amprobe AM-570 is another True RMS digital multimeter designed for both electrical and HVAC applications. It’s known for its reliability, safety, and user-friendly features.

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Key Features:

  • True RMS for accurate AC measurements
  • Auto-ranging with manual range option
  • Measures AC/DC voltage, current, resistance, capacitance, frequency, and duty cycle
  • Temperature measurement with K-type thermocouple
  • Microamp function for HVAC flame sensors
  • Min/Max and Peak hold functions
  • Backlit display for low-light use
  • CAT IV 600V / CAT III 1000V safety rating

Best For: Electricians and HVAC techs who want a solid multimeter with a focus on HVAC applications and general troubleshooting.

Klein Tools MM325 Multimeter, Digital Manual-Ranging 600V AC/DC Voltage Tester, Tests Batteries, Current, Resistance, Diodes, and Continuity

βœ… Pros and Cons of Each

Klein MM720 Pros:

  • LoZ mode eliminates ghost voltages
  • High-resolution display
  • CAT IV safety rating for high protection
  • Excellent for both HVAC and industrial work

Klein MM720 Cons:

  • Slightly bulkier than some competitors
  • Pricier than Klein’s lower-tier models

Amprobe AM-570 Pros:

  • Peak Hold function for capturing surges
  • Strong HVAC support with microamps + temperature
  • Reliable brand with a reputation for accuracy
  • Comfortable grip and ergonomic design

Amprobe AM-570 Cons:

  • No dedicated LoZ mode
  • Display not as sharp as the MM720

πŸ† Verdict: Klein MM720 or Amprobe AM-570?

Both meters are excellent choices for professionals, and they share a lot of overlap.

  • Choose the Klein MM720 if you want LoZ functionality, higher display resolution, and all-around versatility for industrial and electrical environments.
  • Choose the Amprobe AM-570 if you value HVAC-friendly features like Peak Hold and want a trusted alternative to Klein and Fluke.

πŸ‘‰ In short:

  • MM720 = best for electricians who need LoZ mode and advanced troubleshooting.
  • AM-570 = best for HVAC and general-purpose use with solid reliability.

Klein Tools MM325 Multimeter, Digital Manual-Ranging 600V AC/DC Voltage Tester, Tests Batteries, Current, Resistance, Diodes, and Continuity