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Klein ET310 Digital Circuit Breaker Finder

Manufacturer: Klein Tools | Catalog # ET310 | OneSource Part # 4953593

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Technical Information

Locate Circuit Breakers in Panel, Test GFCI Devices
Blade Dimensions
10.96 in L x 1.39 in W x 2.16 in H
ABS Plastic
Number of Rows
Electronic Tester


Pkg Qty

Manufacturer Information

Family Brand Name
Klein Tools

General Product Info

Product UPC
0.625 lb


10.96 Inch
1.39 Inch
10.96 Inch
Overall Length
10.96 in
2.160 in
  • Easily accessible battery compartment. Uses one 9V battery in receiver only; Transmitter does not require a battery
  • GFCI tester consists of two parts - a Transmitter connected to the electrical outlet or fixture, and a Receiver used to scan the panel to locate the correct breaker
  • Measurement Category II is applicable to test and measuring circuits connected directly to utilization points (socket outlets and similar points) of the low-voltage MAINS installation
  • Transmitter incorporates a three-pin plug for connecting to North-American-style grounded electrical outlets.
  • This circuit breaker finder can quickly and accurately locate the correct circuit breaker in a panel corresponding to the circuit to which an electrical outlet or fixture is connected
  • Operates on 90-120V AC circuits
  • Includes Transmitter, Receiver, user manual, and 9V battery (for Receiver)
  • The transmitter may be connected to other electrical fixtures using optional accessories which are sold separately (Cat. No. 69411)
  • Transmitter incorporates a GFCI outlet tester to inspect the wiring condition at the electrical outlet and test GFCI devices
  • Receiver delivers clear visual and audible indications when the correct breaker has been located
  • CAT II 120V safety rating
  • Low battery indicator
  • Receiver powers off automatically after approximately three minutes of non-use to conserve battery life
  • Transmitter is powered by the circuit when connected to the electrical outlet or fixture
  • Built to withstand a 6.6-Foot (2 m) drop
  • Transmitter docks in the Receiver for convenient storage as a single item when tester is not is use
  • Before each use, verify tester operation by testing on a known live and correctly wired receptacle and circuit.
  • Tester is intended for indoor use only. The tester is designed for use with 120V AC electrical systems. DO NOT connect to higher voltage electrical supplies.
  • Exercise extreme caution around energized, bare wires, especially when working in or around an open breaker panel.
  • If using accessories to connect to bare wires ensure that the circuit is not energized before inspecting, applying, or removing the transmitter.
  • DO NOT use if the tester appears damaged in any way. Always consult a qualified electrician to resolve wiring problems.
  • Read, understand, and follow all warnings and instructions before operating testers.