---
product_id: 737545143
title: "Klein Tools MM420 Digital Multimeter, Automatic Range TRMS Multimeter, 600V AC/DC Voltage, 10A AC/DC Current, 50 Momh Resistor, Orange/Black"
brand: "klein tools"
price: "€ 94.67"
currency: EUR
in_stock: true
reviews_count: 5
category: "Klein Tools"
url: https://www.desertcart.ie/products/737545143-klein-tools-mm420-digital-multimeter-automatic-range-trms-multimeter-600v
store_origin: IE
region: Ireland
---

# 600V AC/DC voltage range Low battery indicator & easy battery access 6.6 ft drop-tested durability Klein Tools MM420 Digital Multimeter, Automatic Range TRMS Multimeter, 600V AC/DC Voltage, 10A AC/DC Current, 50 Momh Resistor, Orange/Black

**Brand:** klein tools
**Price:** € 94.67
**Availability:** ✅ In Stock

## Summary

> ⚡ Power up your precision — never miss a beat with Klein’s MM420!

## Quick Answers

- **What is this?** Klein Tools MM420 Digital Multimeter, Automatic Range TRMS Multimeter, 600V AC/DC Voltage, 10A AC/DC Current, 50 Momh Resistor, Orange/Black by klein tools
- **How much does it cost?** € 94.67 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/737545143-klein-tools-mm420-digital-multimeter-automatic-range-trms-multimeter-600v)

## Best For

- klein tools enthusiasts

## Why This Product

- Trusted klein tools brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Rugged & Reliable:** Built to survive 6.6 ft drops, this multimeter is your dependable partner on any job site.
- • **User-Friendly Design:** Low battery alerts and quick-access battery/fuse compartments keep you working without interruption.
- • **Precision TRMS Technology:** Experience true accuracy with automatic range TRMS measurements for flawless diagnostics.
- • **Illuminated Lead Placement:** LED backlit display and lead illumination ensure error-free readings even in low-light environments.
- • **Versatile Measurement Suite:** Measure voltage, current, resistance, temperature, capacitance, frequency, and more—all in one sleek device.

## Overview

The Klein Tools MM420 is a professional-grade digital multimeter featuring True RMS technology for precise AC/DC voltage and current measurements up to 600V and 10A. Designed with electricians in mind, it offers a comprehensive range of functions including temperature, capacitance, frequency, and diode testing. Its rugged build withstands drops up to 6.6 feet, while LED illumination and a backlit display ensure clear readings in any environment. With user-friendly features like low battery indicators and easy battery access, the MM420 is engineered for reliability and efficiency on the job.

## Description

Product Description Klein Tools MM420 Multimeter is a True Square Average Square Root (TRMS) multimeter for measuring AC/DC voltage, AC/DC current, and resistance. It can also measure temperature, capacitance, frequency, duty cycle, test diodes and conductivity. The Klein Tools test and measurement product line is designed exclusively from the ground up by an electrician. By combining years of field research and extensive inputs from electricians across the country, the company influenced the development of innovative, time-saving meter and electrical testers. Safety Warning Do not use the meter in electric storms or rainy weather. Also, do not use if the meter or test lead appears damaged

Review: good
Review: This multimeter is very useful.

## Features

- This multimeter is made with automatic measurement standard square root (TRMS) technology for increased precision
- Measures up to 600V AC/DC voltage, 10A AC/DC current, 50 mom resistance, continuous, temperature, capacitance, frequency, duty cycle and test diodes
- Led light protection with LED illumination for lead placement and easy to read backlit display
- Low battery indicator and easy access battery and fuse compartment
- Durable meter withstands 6.6 feet (2 m) drops

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0B57PFFYX |
| Amazon Bestseller | #998,082 in DIY, Tools & Garden ( See Top 100 in DIY, Tools & Garden ) #68,394 in Electrical Equipment |
| Are Batteries Included | Yes |
| Battery Type | Alkaline |
| Brand | KLEIN TOOLS |
| Color | orange/black |
| Customer Reviews | 4.7 4.7 out of 5 stars (9,752) |
| Date First Available | May 4, 2024 |
| Included Components | Digital Multimeter, TRMS Auto Range, 600V, Temperature |
| Item Weight | 50 g |
| Laser Class | Lead Alter; Auto Range; Min/Max Measurement; Backlight; Auto Power Off; Data Hold |
| Material | Blend |
| Model Number | MM420 |
| Name List for Name Plates | Includes lead door rate |
| Power Source | Battery Powered |
| Product Dimensions | 23.7 x 12.9 x 9.7 cm; 50 g |
| Wallpaper Pattern | Multimeter |

## Product Details

- **Brand:** KLEIN TOOLS
- **Color:** orange/black
- **Item dimensions L x W x H:** 23.7 x 12.9 x 9.7 cm
- **Power Source:** Battery Powered
- **Style:** Includes lead door rate

## Images

![Klein Tools MM420 Digital Multimeter, Automatic Range TRMS Multimeter, 600V AC/DC Voltage, 10A AC/DC Current, 50 Momh Resistor, Orange/Black - Image 1](https://m.media-amazon.com/images/I/51O0EAYj9aL.jpg)
![Klein Tools MM420 Digital Multimeter, Automatic Range TRMS Multimeter, 600V AC/DC Voltage, 10A AC/DC Current, 50 Momh Resistor, Orange/Black - Image 2](https://m.media-amazon.com/images/I/61G61oMpJeL.jpg)
![Klein Tools MM420 Digital Multimeter, Automatic Range TRMS Multimeter, 600V AC/DC Voltage, 10A AC/DC Current, 50 Momh Resistor, Orange/Black - Image 3](https://m.media-amazon.com/images/I/61x0nOpxbsL.jpg)
![Klein Tools MM420 Digital Multimeter, Automatic Range TRMS Multimeter, 600V AC/DC Voltage, 10A AC/DC Current, 50 Momh Resistor, Orange/Black - Image 4](https://m.media-amazon.com/images/I/51FLeGC6O9L.jpg)
![Klein Tools MM420 Digital Multimeter, Automatic Range TRMS Multimeter, 600V AC/DC Voltage, 10A AC/DC Current, 50 Momh Resistor, Orange/Black - Image 5](https://m.media-amazon.com/images/I/61JV+XD63SL.jpg)

## Available Options

This product comes in different **Style** options.

## Customer Reviews

### ⭐⭐⭐⭐ Review
*by A***R on November 8, 2018*

good

### ⭐⭐⭐⭐⭐ Review
*by H***8 on July 31, 2025*

This multimeter is very useful.

### ⭐⭐⭐⭐⭐ Review
*by D***J on December 16, 2025*

Rewelacyjny multimetr,polecam również dla początkujących.

## Frequently Bought Together

- Klein Tools MM420 Digital Multimeter, Auto-Ranging TRMS Multimeter, 600V AC/DC Voltage, 10A AC/DC Current, 50 MOhms Resistance
- WERJIA Hard Carrying Case for Klein Tools MM420/MM325/MM720/MM700/ET600/MM450 Digital Multimeter
- Klein Tools 69417 Rare-Earth Magnetic Hanger, with Strap

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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-02-23*