Klein Tools ET310TRANS Transmitter — Replacement for ET310 Circuit Breaker Finder with Integrated GFCI Tester

Overview

The Klein Tools ET310TRANS is the dedicated replacement Transmitter for the ET310 Circuit Breaker Finder. Paired with a Receiver, it helps you identify the correct breaker while wiring checks are performed at the outlet. The Transmitter also carries an integrated GFCI Outlet Tester, allowing quick on-site verification of wiring faults before you proceed with any work.

Built by Klein Tools, a family-owned brand with six generations of electrical expertise, this component emphasizes quality materials, dependable craftsmanship, and thoughtful tool design. It’s designed for professional electricians who value accuracy, durability, and field-ready practicality.

What you get

• Replacement Transmitter for the ET310 Circuit Breaker Finder with Integrated GFCI Outlet Tester
• Two-part system: a Transmitter connected to the outlet or fixture, and a Receiver that scans the panel to locate the correct breaker
• Test GFCI devices for tripping with the built-in tester in the Transmitter
• Check common wiring faults in North American grounded outlets
• Compatible with optional accessories (Cat. No. 69411) to connect the Transmitter to other fixtures

Field-ready usage and benefits

In the field, this Transmitter helps you confirm which circuit powers a outlet or fixture, reducing guesswork when working inside panels. The integrated GFCI tester adds a quick diagnostic step that can prevent unnecessary trips during a site visit. When used with the ET310 Receiver, you can smoothly pinpoint the breaker associated with a specific outlet, streamlining multi-circuit setups and maintenance tasks.

Note that benefits are presented as possibilities based on the product features and typical use cases, not guarantees. The combination of reliable construction, a two-piece system, and practical testing capabilities supports safer, more efficient electrical work.

Brand heritage and reliability

With decades of experience in premium hand tools, Klein Tools emphasizes durability and professional-grade performance. The ET310TRANS reflects the brand’s commitment to robust, field-tested solutions that professionals can rely on over time.