--- product_id: 123584662 title: "ET40" brand: "klein tools" price: "€ 40.07" currency: EUR in_stock: true category: "Klein Tools" url: https://www.desertcart.at/products/123584662-et40 store_origin: AT region: Austria --- # 12-240V AC & 1.5-24V DC range Bright LED voltage & polarity indicators CAT III 250V safety & IP41 durability ET40 **Brand:** klein tools **Price:** € 40.07 **Availability:** ✅ In Stock ## Summary > ⚡ Test Smarter, Work Safer — The Voltage Tester That Means Business ## Quick Answers - **What is this?** ET40 by klein tools - **How much does it cost?** € 40.07 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.at](https://www.desertcart.at/products/123584662-et40) ## 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 Jobsite Ready:** IP41 dust and water resistance plus 3m drop protection means this tester thrives where others fail. - • **Safety You Can Trust:** CAT III 250V rating with double insulation guarantees professional-grade protection on every job. - • **Illuminated Precision:** Bright LED indicators ensure you never miss a voltage level or polarity detail, even in low-light environments. - • **Versatile Voltage Mastery:** Seamlessly test both AC and DC voltages across a broad range for all your residential and light commercial needs. - • **Built-In Test Lead Holders:** Smartly designed holders keep your leads secure and perfectly spaced for tamper-resistant outlet testing and easy storage. ## Overview The Klein Tools ET40 Digital AC/DC Voltage Tester offers professional-grade voltage testing from 12 to 240V AC and 1.5 to 24V DC with clear LED indicators for voltage and polarity. Built tough with IP41 dust/water resistance, 3m drop protection, and CAT III 250V safety rating, it’s engineered for reliable, precise measurements on any jobsite. Compact and user-friendly, it includes built-in test lead holders and long-lasting battery life, making it the go-to tool for electricians and pros who demand accuracy and durability. ## Description Klein Tools ET40 is an Electronic AC/DC Voltage Tester. It measures AC voltages from 12V to 240V and DC voltages as low as 1.5V up to 24V. Tester also indicates positive and negative DC polarity. For more than 160 years, Klein Tools has manufactured premium-quality, professional-grade hand tools that deliver the performance, durability and precision needed to get the job done right. Our family of engineers, workers and craftsman continue to put six generations of expertise into every tool we create by using only the highest quality materials, superior workmanship, and keeping manufacturing as close to home as we can. Klein isn't just the name of our company, it's also our family name. And since we're an American company that's family-owned and family-run, you know you can count on us to be here tomorrow. Klein Tools doesn't just make great products, we make great products that stand up to the demands of the professionals who use them every day ... Since 1857. ## Features - VERSATILE VOLTAGE TESTING: Test AC voltages from 12V to 240V and DC voltages from 1.5V to over 17V with four useful levels, covering common residential and DC voltages - CLEAR VOLTAGE INDICATION: Bright LEDs illuminate, providing clear indication of voltage type and level, ensuring accurate measurements every time - BUILT-IN TEST LEAD HOLDERS: Conveniently built-in test lead holders on the back of the meter spaced for testing tamper-resistant US-style outlets and easy storage - POLARITY INDICATION: Easily determine polarity when measuring DC voltages, making electrical troubleshooting quick and efficient - ENHANCED DURABILITY: IP41 ingress protection and 9.8 ft. (3m) drop protection to meet jobsite demands - HIGH SAFETY STANDARDS: CAT III 250V, Class 2, Double insulation rating ensures safe and reliable operation, meeting industry standards - RELIABLE BATTERY LIFE: Long-lasting battery provides consistent performance, allowing you to rely on accurate voltage measurements whenever needed ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07P45RB8S | | Best Sellers Rank | #83,630 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #62 in Voltage Testers | | Brand Name | KLEIN TOOLS | | Color | Orange | | Customer Reviews | 4.5 4.5 out of 5 stars (760) | | Global Trade Identification Number | 00092644691836 | | Included Components | No|Tester, User Manual, and 2 x AAA Batteries | | Item Dimensions | 5.24 x 1.52 x 1.11 inches | | Item Type Name | Klein Tools ET40 Voltage Tester, AC Voltage, DC Voltage, and DC Polarity, Low Voltage Tester Includes Batteries | | Item Weight | 2.3 ounces | | Manufacturer | Klein Tools | | Measurement Type | Voltmeter | | Minimum Operating Voltage | 1.5 volts | | Model | ET40 | | Number of Items | 1 | | Part Number | ET40 | | Power Source | Battery Powered | | Specification Met | CE | | Style Name | 12/240 V | | UPC | 092644691836 | | Warranty Description | See Manufacturer Website | ## Product Details - **Brand:** KLEIN TOOLS - **Color:** Orange - **Item Weight:** 2.3 ounces - **Power Source:** Battery Powered - **Style:** 12/240 V ## Images ![ET40 - Image 1](https://m.media-amazon.com/images/I/612T16OUlgL.jpg) ## Available Options This product comes in different **Style** options. ## Frequently Bought Together - Klein Tools ET40 Digital AC/DC Voltage Tester, 12-240V AC, 1.5-24V DC, LED Illumination, DC Polarity, Auto Off, CATIII 250V-Class 2- Double Insulation, IP4 Dust and Water Resistant - Klein Tools RT250 GFCI Outlet Tester with LCD Display, Electric Voltage Tester for Standard 3-Wire 120V Electrical Receptacles - IDEAL Electrical 45-025 Lil Ripper Stripper Wire Stripper w/ Slitting Blade, V-Notch, Flat Blade Clip --- ## 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.at/products/123584662-et40](https://www.desertcart.at/products/123584662-et40) --- *Product available on Desertcart Austria* *Store origin: AT* *Last updated: 2026-08-20*