https://www.mccoys.com/shop/p/1124973-052303-18/klein-tools-et40-electronic-tester-12-to-240-v-ac-voltage-15-to-17-to-24-v-dc-voltage-analog-led-display
ET40 Electronic Tester, 12 to 240 V AC Voltage, 1.5 to >17 to 24 V DC Voltage, Analog LED Display
Sku: 1124973-052303-18
$21.11
4 Available at
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Estimated Arrival On: 01/23/2026
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 1.5 V. It tests AC voltages 12 to 240 VAC. 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.
- Tests AC voltages from 12 V to 240 VAC at four useful levels aligned with commonly used residential voltages
- Tests DC voltages from 1.5 V to greater than 17 to 24 V 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 drop
- Indicates polarity when measuring DC voltages
- Powers off automatically after approximately 2 min of non-use to conserve battery life
Measuring Functions
AC Voltage, DC Voltage
Measuring Range
12 to 240 V AC Voltage, 1.5 to >17 to 24 V DC Voltage
Display Type
Analog LED
Indication Type
Bright LED
IP Rating
IP41
Temperature Rating
5 to 113
Material
Plastic
Dimensions
5.24 in L x 1.11 in W x 1.52 in H
Includes
(2) AAA Batteries
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