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Model #ET40

Store SKU #1004537460

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Electronic AC/DC Voltage Tester

$1497
  • Tests voltages for AC at four useful levels: from 12V to 240V AC
  • Tests voltages for DC at 1.5V to 24V, at four useful levels
  • Identifies and distinguishes between AC or DC voltage
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Product Overview

Klein Tools ET40 is an Electronic AC/DC Voltage Tester. It features indicators for positive and negative DC polarity, and tests DC voltages as low as 1.5V. It tests AC voltages 12-240VAC. Excellent for checking, verifying or troubleshooting common residential electrical wiring in electrical outlets, light fixtures, doorbells and more. It operates on 2 x AAA batteries.
  • Voltage Tester for AC voltages from 12V to 240V AC at four useful levels aligned with commonly used residential voltages
  • Tests DC voltages from 1.5-Volt to greater than 17-Volt to 24-Volt at four useful levels aligned with commonly used DC voltages
  • Bright LEDs illuminate to indicate the type and level of voltage detected
  • Built to withstand a 9.9 ft. (3 m) drop
  • Indicates polarity when measuring DC voltages
  • Powers off automatically after approximately 2-minutes of non-use to conserve battery life
  • CAT III 250-Volt, class 2, double insulation
  • Ingress protection IP41 dust and water resistant
  • Built-in test lead holders on sides of tester
  • Low battery indicator with easily accessible battery compartment
  • Pocket clip secures tester to pocket for reliable everyday carrying
  • Shop all Klein Tools voltage testers here



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Info & Guides

You will need Adobe® Acrobat® Reader to view PDF documents. Download a free copy from the Adobe Web site.

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Price
$1297
$1497
$2451
$2697
Ratings
(157)
(139)
(126)
(80)
Test Meter TypeVoltage TesterVoltage TesterVoltage TesterVoltage Tester
Control TypeDigitalDigitalManual/AnalogDigital
Electrical Tools FeaturesAudible Alert,Auto Ranging,DC Polarity Indicator,HandheldBattery Powered,DC Polarity Indicator,Handheld,Integral Lead Storage,Low Battery Indicator,Visual AlertAudible Alert,HandheldBattery Powered,Handheld,Noncontact Detection,On/Off Switch for Laser Sight,Visual Alert
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Specifications

Dimensions

Product Depth (in.)
5.24 in
Product Height (in.)
1.11 in
Product Width (in.)
1.52 in

Details

Battery Power Type
Alkaline
Battery Size
AAA
Control Type
Digital
Display Type
Indicator Lights
Electrical Tools Features
Battery Powered,DC Polarity Indicator,Handheld,Integral Lead Storage,Low Battery Indicator,Visual Alert
Measures/Detects
Polarity,Voltage
Number of Batteries Required
2
Product Weight (lb.)
0.268 lb
Returnable
90-Day
Test Meter Type
Voltage Tester
Tools Product Type
Voltage Detector

Warranty / Certifications

Manufacturer Warranty
Please refer to the attached warranty document in the Product Overview section above under Info & Guides.

Questions & Answers

Typical questions asked about products:

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Customer Reviews

  • 4.1
    out of 139 reviews
  • 83% recommend this product
Filter by:
Showing 1-10 of 139 reviews
Frankly, the very positive reviews are a curiosity to me. I suppose if all you want to do is ver...
Frankly, the very positive reviews are a curiosity to me. I suppose if all you want to do is verify a live or dead circuit and/or confirm if line voltage is (roughly) 120 VAC or 240 VAC, then this tester would be adequate. However, you will not be able to determine the exact voltage--only the approximate. For example, let's say you have an AC generator and you want to know if it is putting out 110 votes or 130 volts, all you will see is a light indicating that you have 120V. I bought this as a gift for someone to check their 1.5 volt and 9 volt used batteries to determine if they still have a usable charge. Nearly depleted 1.5 volt batteries still happily light up the test light which suggests those batteries still have usable life. A true tester (aka meter) would tell you what the exact voltage is, not whether you are simply in the ballpark. You know if you are reading 1.4 volts or less that it is time to replace the 1.5V battery. In short, you can read the voltage label on the batteries and glean about as much information as the go/no go lights. Unless a battery is nearly dead this tester will indicate it is in good shape. For true diagnostics, you need a meter, not a series of on/off lights. It is misleading that it says it includes a low battery indicator. That indicator is for the internal tester batteries, not for what you want to check, and it only flashes if the internal batteries are low..
by
    1 person found this helpful
    This Klein Voltage Tester is a very handy little tool to have in your electrical pouch. It is com...
    This Klein Voltage Tester is a very handy little tool to have in your electrical pouch. It is compact, is easy to read and convenient to handle. It fits in your shirt pocket for quick access. I like the slim design and the quality appears to be very good and rugged. The test leads are short and have caps which are handy when doing circuit board tests. Get one of these for your electrical kit.
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    • Recommended
    This Klein model ET 40 AC and DC voltage tester is very compact and easy to use. It has a hardwi...
    This Klein model ET 40 AC and DC voltage tester is very compact and easy to use. It has a hardwired set of 9 inch test leads (see picture) which will fit most any test situation. The leads tips store right in the sides of the tester (see picture), clipping right into the side of the tester. The tester can easily be stored in a small space or fit into your pocket or belt because the body of the tester is only 5 inches in length and it has a handy clip to secure the tester (see picture). It has fixed voltage ranges which will show an LED display when the voltage reaches that level (see picture) as opposed to a specific digital voltage readout value. For some DIY applications, this is just the right tool to use. It runs on two 1.5V AAA batteries, and the compartment they are in is secured by a screw so no worries about it all coming apart if dropped (see picture)! This is very a rugged tool. I highly recommend it for situations where you frequently work with certain voltage levels such as in power supply or automotive system testing (12V) as well as around the house with standard 120 or 240 volt lines.
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    • Recommended
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        This is a good, economical power tester for most household...
        This is a good, economical power tester for most household needs. I would give it an excellent rating if the next version had longer tips to make it easier to insert into receptacles, etc.
        by
          Simple to use And fit in one hand...
          Simple to use And fit in one hand
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                  Showing 1-10 of 139 reviews