Klein Tools ET40 displays AC/DC voltage with clear LED readout for quick checks.
Klein Tools ET40 bright LEDs illuminate voltage levels for easy troubleshooting in dim spaces.
Klein Tools ET40 back features built-in test lead holders for organized testing.
Klein Tools ET40 DC polarity indicator shows polarity for safe DC connections.
Klein Tools ET40 IP41 rating protects against dust and water in harsh jobsites.
Klein Tools ET40 CAT III 250V with double insulation for safer testing.
Klein Tools ET40 rugged body resists drops and rough handling.
Klein Tools ET40 long battery life reduces mid-work changes.
Klein Tools ET40 used for residential voltage checks and quick diagnostics.

KLEIN TOOLS

Klein Tools ET40 Digital AC/DC Voltage Tester — 12-240V AC / 1.5-24V DC, LED, IP41, CAT III 250V

High-performance tools and home improvement made for confident daily results

$26.25

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Why customers choose TaskHolt Tools

Overview

The Klein Tools ET40 Digital AC/DC Voltage Tester is built for quick, reliable voltage checks across common electrical tasks. It measures AC voltages from 12V up to 240V and DC voltages from 1.5V to 24V, covering typical residential outlets and many DC systems you may encounter on the job. Bright LED illumination guides you through readings, helping you confirm voltage type and level at a glance, even in busy or dim environments. A polarity indicator for DC readings helps identify positive and negative connections before you proceed with a test.

Key capabilities

  • Test AC voltages from 12V to 240V and DC voltages from 1.5V to 24V
  • Bright LED indicators show voltage type and level for quick confirmation
  • Built-in test lead holders on the back keep leads organized and within reach
  • DC polarity indication helps identify connections during troubleshooting

Real-world use cases

  • Outlet and circuit checks in residential and commercial settings
  • DC system checks in vehicles and equipment
  • Diagnostics and quick verifications during installations or service calls

Safety, durability, and performance

Designed for demanding environments, the ET40 offers IP41 dust and water resistance and a rugged build with 3 meters (about 10 feet) of drop protection. It carries CAT III 250V and Class 2 double insulation, aligning with common industry safety expectations while supporting dependable field use. A long-lasting battery and an auto-off feature help keep you ready for the next check, reducing interruptions on busy jobs.

In practice, the ET40 blends portable convenience with dependable measurement readiness. Its bright display and polarity guidance support quick decisions, and the organized storage features let you move between outlets, panels, and equipment without digging for tools or leads. This makes it a versatile companion for electricians, technicians, and DIY enthusiasts who value clarity, safety, and reliable performance on the job.

FAQ

Q: What voltages can the ET40 test?

A: It tests AC voltages from 12 to 240V and DC voltages from 1.5 to 24V, with polarity indication.

Q: What safety features does the ET40 offer?

A: CAT III 250V, Class 2 double insulation, IP41 protection, and 3 m drop protection.

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