--- product_id: 562207687 title: "Klein Tools MM420 Digital Multimeter, Auto-Ranging TRMS Multimeter, 600V AC/DC Voltage, 10A AC/DC Current, 50 MOhms Resistance" brand: "klein tools" price: "£146.69" currency: GBP in_stock: true reviews_count: 5 category: "Klein Tools" url: https://www.desertcart.co.uk/products/562207687-klein-tools-mm420-digital-multimeter-auto-ranging-trms-multimeter-600v store_origin: GB region: United Kingdom --- # 600V AC/DC Voltage 50 MΩ Resistance 10A AC/DC Current Klein Tools MM420 Digital Multimeter, Auto-Ranging TRMS Multimeter, 600V AC/DC Voltage, 10A AC/DC Current, 50 MOhms Resistance **Brand:** klein tools **Price:** £146.69 **Availability:** ✅ In Stock ## Summary > ⚙️ Master your measurements with Klein’s pro-grade precision! ## Quick Answers - **What is this?** Klein Tools MM420 Digital Multimeter, Auto-Ranging TRMS Multimeter, 600V AC/DC Voltage, 10A AC/DC Current, 50 MOhms Resistance by klein tools - **How much does it cost?** £146.69 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/562207687-klein-tools-mm420-digital-multimeter-auto-ranging-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 - • **Built to Last:** Rugged design withstands 6.6-foot drops—ready for any job site challenge. - • **Safety First, Always:** Lead-Alert LEDs ensure correct test lead placement for foolproof safety. - • **Precision Meets Power:** Auto-ranging TRMS tech delivers pinpoint accuracy every time. - • **Hands-Free Convenience:** Integrated test lead holders, kickstand, and optional magnetic hanger for ultimate ease. - • **Work Anywhere, Anytime:** Backlit LCD display guarantees clear readings even in low-light conditions. ## Overview The Klein Tools MM420 Digital Multimeter is a robust, auto-ranging TRMS device capable of measuring up to 600V AC/DC voltage, 10A AC/DC current, and 50 MΩ resistance. Designed for professionals and serious DIYers, it features lead-alert safety LEDs, a backlit display for low-light visibility, and durable construction that withstands drops up to 2 meters. Complete with test leads, thermocouple, and batteries, it’s engineered for accuracy, safety, and convenience across residential, HVAC, and light industrial environments. ## Description Product Description ## Features - VERSATILE FUNCTIONALITY: Measures AC/DC voltage up to 600V, 10A AC/DC current, 50MΩ resistance; additional features include continuity, temperature, capacitance, frequency/duty cycle and diode test - LEAD-ALERT PROTECTION: LEDs on the meter illuminate to indicate proper test lead placement, enhancing accuracy and safety during measurements - BACKLIT DISPLAY: LCD shows clear readings in low-light conditions for enhanced visibility - ACCURATE MEASUREMENTS: Auto-ranging and True Root Mean Squared (TRMS) technology provides precise and accurate measurements - CONVENIENT FEATURES: Test lead holders on the back of the meter, kickstand and optional magnetic hanger (Cat. Nos. 69445 or 69417) for hands-free operation - DURABLE CONSTRUCTION: Built to withstand a 6.6-Foot (2 m) drop, ideal for use in basic and controlled electromagnetic environments such as residential, business, HVAC and light-industrial locations - COMPLETE PACKAGE: Includes test leads with CAT III/CAT IV safety caps, thermocouple, instructions, and 2 x AAA batteries ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0B57PFFYX | | Best Sellers Rank | #34,901 in Home Improvement ( See Top 100 in Home Improvement ) #46 in Multi Testers | | Brand | KLEIN TOOLS | | Brand Name | KLEIN TOOLS | | Colour | Black | | Country of Origin | China | | Customer Reviews | 4.7 out of 5 stars 573 Reviews | | Global Trade Identification Number | 00092644693748 | | Included Components | Digital Multimeter, TRMS Auto-Ranging, 600V, Temp | | Item Dimensions | 23.7 x 12.9 x 9.7 Centimeters | | Item Length | 6.41 Inches | | Item Type Name | Building Material | | Item Weight | 0.11 Pounds | | Item Width | 1.78 Inches | | Item dimensions L x W x H | 23.7 x 12.9 x 9.7 Centimeters | | Manufacturer | KLEIN TOOLS | | Measurement Type | Multimeter | | Minimum Operating Voltage | 9 Volts | | Model Number | MM420 | | Part Number | MM420 | | Power Source | Battery Powered | | Power Source Type | Battery Powered | | Specification Met | Cat Iii 600v Safety Rating | | Style | Auto-Ranging | | Style Name | Auto-Ranging | | UPC | 092644693748 | | Unit Count | 1.0 Count | | Upper Temperature Rating | 60 Degrees Celsius | ## Product Details - **Brand:** KLEIN TOOLS - **Colour:** Black - **Item Weight:** 0.91 Pounds - **Power Source:** Battery Powered - **Style:** Auto-Ranging ## Images ![Klein Tools MM420 Digital Multimeter, Auto-Ranging TRMS Multimeter, 600V AC/DC Voltage, 10A AC/DC Current, 50 MOhms Resistance - Image 1](https://m.media-amazon.com/images/I/51O0EAYj9aL.jpg) ![Klein Tools MM420 Digital Multimeter, Auto-Ranging TRMS Multimeter, 600V AC/DC Voltage, 10A AC/DC Current, 50 MOhms Resistance - Image 2](https://m.media-amazon.com/images/I/61G61oMpJeL.jpg) ![Klein Tools MM420 Digital Multimeter, Auto-Ranging TRMS Multimeter, 600V AC/DC Voltage, 10A AC/DC Current, 50 MOhms Resistance - Image 3](https://m.media-amazon.com/images/I/61x0nOpxbsL.jpg) ![Klein Tools MM420 Digital Multimeter, Auto-Ranging TRMS Multimeter, 600V AC/DC Voltage, 10A AC/DC Current, 50 MOhms Resistance - Image 4](https://m.media-amazon.com/images/I/51FLeGC6O9L.jpg) ![Klein Tools MM420 Digital Multimeter, Auto-Ranging TRMS Multimeter, 600V AC/DC Voltage, 10A AC/DC Current, 50 MOhms Resistance - Image 5](https://m.media-amazon.com/images/I/61JV+XD63SL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by D***J on 16 December 2025* ### ⭐⭐⭐⭐⭐ Review *by C***N on 13 February 2026* ### ⭐⭐⭐⭐⭐ Review *by Z***H on 26 March 2026* ## 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 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/562207687-klein-tools-mm420-digital-multimeter-auto-ranging-trms-multimeter-600v](https://www.desertcart.co.uk/products/562207687-klein-tools-mm420-digital-multimeter-auto-ranging-trms-multimeter-600v) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-16*