---
product_id: 123584662
title: "Klein Tools ET40 Digital AC/DC Voltage Tester, 12-240V AC, 1.5-24V DC, LED Illumination, DC Polarity, Auto Off, CAT III 250V-Class 2- Double Insulation, IP41 Dust and Water Resistant"
brand: "klein tools"
price: "$150085"
currency: COP
in_stock: true
reviews_count: 13
category: "Klein Tools"
url: https://www.desertcart.co/products/123584662-klein-tools-et40-digital-ac-dc-voltage-tester-12-240v
store_origin: CO
region: Colombia
---

# 12-240V AC & 1.5-24V DC range Bright LED voltage & polarity indicators CATIII 250V safety & IP41 dust/water resistance Klein Tools ET40 Digital AC/DC Voltage Tester, 12-240V AC, 1.5-24V DC, LED Illumination, DC Polarity, Auto Off, CAT III 250V-Class 2- Double Insulation, IP41 Dust and Water Resistant

**Brand:** klein tools
**Price:** $150085
**Availability:** ✅ In Stock

## Summary

> ⚡ Illuminate your workflow with precision and power!

## Quick Answers

- **What is this?** Klein Tools ET40 Digital AC/DC Voltage Tester, 12-240V AC, 1.5-24V DC, LED Illumination, DC Polarity, Auto Off, CAT III 250V-Class 2- Double Insulation, IP41 Dust and Water Resistant by klein tools
- **How much does it cost?** $150085 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co](https://www.desertcart.co/products/123584662-klein-tools-et40-digital-ac-dc-voltage-tester-12-240v)

## 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

- • **Illuminated Clarity:** Bright LED indicators ensure you never second-guess voltage type or polarity, making troubleshooting faster and foolproof.
- • **Rugged Jobsite Ready:** Engineered with IP41 dust/water resistance and 9.8 ft drop protection — built tough to keep up with your demanding projects.
- • **Safety You Can Trust:** CATIII 250V rating and double insulation provide professional-grade protection, so you work confidently every time.
- • **Built-In Lead Holders:** Integrated test lead holders designed for tamper-resistant outlets keep your tools organized and your workflow uninterrupted.
- • **Versatile Voltage Mastery:** Seamlessly test both low and high AC/DC voltages with precision from 1.5V to 240V — your all-in-one electrical sidekick.

## Overview

The Klein Tools ET40 Digital AC/DC Voltage Tester offers professional-grade voltage testing from 12-240V AC and 1.5-24V DC with bright LED indicators for clear readings. Featuring built-in test lead holders, IP41 ingress protection, and CATIII 250V safety certification, it’s engineered for durability and accuracy on any jobsite. Powered by included AAA batteries, this compact, rugged tester is trusted by professionals for reliable, safe electrical diagnostics.

## 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.

Review: BEST for beginners!! - This has been such an easy, accurate to and best for beginners!!
Review: klien meters - works as it should,great price also, order other klien meters ty

## 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. (3 m) drop protection to meet jobsite demands
- HIGH SAFETY STANDARDS: CATIII 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 |
| Batteries | 2 AAA batteries required. (included) |
| Batteries Included? | Yes |
| Batteries Required? | Yes |
| Battery Cell Type | Alkaline |
| Best Sellers Rank | #23,861 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #27 in Voltage Testers |
| Brand | KLEIN TOOLS |
| Color | Orange |
| Customer Reviews | 4.5 4.5 out of 5 stars (1,633) |
| Date First Available | February 19, 2019 |
| Description Pile | 2 x AAA |
| Display Style | Analog LED |
| Finish | Brushed |
| Global Trade Identification Number | 00092644691836 |
| Included Components | No|Tester, User Manual, and 2 x AAA Batteries |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 2.3 ounces |
| Item dimensions L x W x H | 5.24 x 1.52 x 1.11 inches |
| Item model number | ET40 |
| Manufacturer | Klein Tools |
| Material | Plastic Housing, PCB with Electronic Components |
| Measurement Accuracy | +/-0.5% |
| Min. Operating Voltage | 1.5 Volts |
| Part Number | ET40 |
| Pattern | Solid |
| Power Source | Battery Powered |
| Product Dimensions | 5.24 x 1.52 x 1.11 inches |
| Shape | Rectangular |
| Size | One Size |
| Special Features | DC Polarity Indicators for DC Positive, DC Negative, and Both Illuminated for AC. Tests Low DC Voltage to 1.5V. Built in Test Lead Holders on Sides of Tester. |
| Specification Met | CE |
| Style | 12/240 V |
| UPC | 092644691836 |

## Product Details

- **Brand:** KLEIN TOOLS
- **Color:** Orange
- **Item Weight:** 2.3 Ounces
- **Power Source:** Battery Powered
- **Style:** 12/240 V

## Images

![Klein Tools ET40 Digital AC/DC Voltage Tester, 12-240V AC, 1.5-24V DC, LED Illumination, DC Polarity, Auto Off, CAT III 250V-Class 2- Double Insulation, IP41 Dust and Water Resistant - Image 1](https://m.media-amazon.com/images/I/51i2DA8X-sL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ BEST for beginners!!
*by R***G on September 6, 2025*

This has been such an easy, accurate to and best for beginners!!

### ⭐⭐⭐⭐⭐ klien meters
*by M***E on August 17, 2025*

works as it should,great price also, order other klien meters ty

### ⭐⭐⭐⭐⭐ Save yourself the Shock!
*by R***N on January 14, 2025*

How many times ahve you been working on a DIY project and wondered is the power on or off? Oh well, let me get to work! and Whammy you got the shock! We've all been there and this will save you, literally and never hurts to be safe! These is SUPER easy to use and while basic, it's a small form factor that is straightforard and simple to operate and a time and shock saver!

## 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
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*Product available on Desertcart Colombia*
*Store origin: CO*
*Last updated: 2026-02-02*