A flat-lay arrangement of the Klein Tools circuit breaker finder kit components, including the orange and black receiver wand, the GFCI outlet transmitter, a light socket adapter, a 3-prong ground adapter, alligator clip adapter, a 9V battery, and a black zippered hard case.
An infographic displaying the receiver and transmitter with text pointing out "Visual and audible indicators" on the receiver, "Tests GFCI devices" on the transmitter, and "Transmitter docks in receiver for storage."
An informational graphic showing the three included adapters: an alligator clip adapter, a 3-prong to 2-prong grounding adapter, and a light socket adapter, with text explaining their uses.
The orange and black ET310 receiver wand standing vertically next to the compact orange GFCI transmitter unit against a white background.
An angled view of the orange and black receiver wand lying flat, showcasing the power button, grip texture, and the sensing tip.
The receiver wand and transmitter displayed diagonally, showing the bottom port of the receiver and the prongs of the transmitter, indicating how they dock together.
A studio shot showing the three accessory adapters isolated: the white 3-prong ground adapter, the white light socket adapter, and the black alligator clip cable.
A close-up of a hand holding the orange receiver wand to scan a column of circuit breakers in a grey electrical panel, with the tip illuminated green.
A close-up of a hand plugging the orange transmitter unit into a standard white electrical outlet to trace the circuit.
A person wearing leather gloves holding the transmitter connected to the alligator clip adapter, which is attached to bare wires inside an open wall junction box.
The open black carrying case showing the circuit breaker finder kit components neatly organized inside a custom-fit black foam insert.
The closed black semi-hard carrying case featuring the Klein Tools logo in white and orange piping around the zipper.
Digital Circuit Breaker Finder with GFCI Outlet Tester (ET310) promotional video
Circuit Breaker Finder Accessory Kit promotional video
A flat-lay arrangement of the Klein Tools circuit breaker finder kit components, including the orange and black receiver wand, the GFCI outlet transmitter, a light socket adapter, a 3-prong ground adapter, alligator clip adapter, a 9V battery, and a black zippered hard case.
An infographic displaying the receiver and transmitter with text pointing out "Visual and audible indicators" on the receiver, "Tests GFCI devices" on the transmitter, and "Transmitter docks in receiver for storage."
An informational graphic showing the three included adapters: an alligator clip adapter, a 3-prong to 2-prong grounding adapter, and a light socket adapter, with text explaining their uses.
The orange and black ET310 receiver wand standing vertically next to the compact orange GFCI transmitter unit against a white background.
An angled view of the orange and black receiver wand lying flat, showcasing the power button, grip texture, and the sensing tip.
The receiver wand and transmitter displayed diagonally, showing the bottom port of the receiver and the prongs of the transmitter, indicating how they dock together.
A studio shot showing the three accessory adapters isolated: the white 3-prong ground adapter, the white light socket adapter, and the black alligator clip cable.
A close-up of a hand holding the orange receiver wand to scan a column of circuit breakers in a grey electrical panel, with the tip illuminated green.
A close-up of a hand plugging the orange transmitter unit into a standard white electrical outlet to trace the circuit.
A person wearing leather gloves holding the transmitter connected to the alligator clip adapter, which is attached to bare wires inside an open wall junction box.
The open black carrying case showing the circuit breaker finder kit components neatly organized inside a custom-fit black foam insert.
The closed black semi-hard carrying case featuring the Klein Tools logo in white and orange piping around the zipper.
Digital Circuit Breaker Finder with GFCI Outlet Tester (ET310) promotional video
Circuit Breaker Finder Accessory Kit promotional video
KLEIN TOOLS

Klein Tools Circuit Breaker Finder ET310KIT Digital Locator (GFCI Outlet Tester Light Socket Adapter Clips Case Safety Testing Diagnostic Tool)

Only 3 left
SKU: ET310KIT
$69.98 USD

Description

Klein promotional logo logout

Industrial-Grade Digital Circuit Breaker Locator Kit with Integrated GFCI Receptacle Tester, Light Socket Adapter, and Heavy-Duty Hard Storage Case

The Klein Tools ET310KIT Digital Circuit Breaker Finder Kit delivers specialized electrical diagnosis utility and exceptional safety testing accuracy across live residential and commercial power networks. Operating on standard 90-120V AC systems, this two-part tracing setup utilizes a signal transmitter to load localized current signatures and a microprocessor-controlled receiver to scan panelboards without building-wide power blackouts. This commercial diagnostic solution resolves blind layout guessing, accidental circuit interruptions, and safety compliance tracing faults by combining a dedicated GFCI fault testing matrix with exposed wire alligator clamps and screw-in lamp base adapters. Outfitted with a 6.6-foot drop-protected PC-ABS housing, a CAT II 120V safety protection rating, and an impact-resistant custom foam hard case, this diagnostic tool optimizes subcontractor field productivity during system maintenance, branch mapping, and troubleshooting cycles.

Best Used For:

  • Panelboard Circuit Mapping: Pinpointing the exact singular overcurrent breaker device tracking to a targeted branch outlet or wall switch without shutting down active electronic equipment panels.
  • GFCI System Auditing: Verification of ground fault circuit interrupter device trip times and checking open-ground or reversed wiring defects on standard electrical receptacle terminals.
  • Unterminated Circuit Diagnostics: Tracing raw overhead light fixture adapters and bare un-terminated building wire lines safely using the specialized clip adapter leads.

Key Performance & Safety Features

  • Precision Audio-Visual Feedback: Handheld receiver indicates definitive breaker selection via clear digital signal flashing codes and continuous tone frequencies.
  • Dual-Purpose Signal Core: Heavy-duty plug-in transmitter acts as an automated network diagnostic tracing generator while serving as a full-tier outlet fault path tester.
  • Universal Light Fitting Link: Included screw-base lamp adapter permits operators to scan lighting circuits through standard medium-Edison sockets directly.
  • Exposed Lead Alligator Clamps: Insulated clip bridges attach cleanly to open conductor configurations to ease unmapped structural circuit tracking path bottlenecks.
  • PC-ABS Armor Shell: Premium engineering composite body handles severe 6.6-foot worksite drops and blocks electrical arcing paths during technical testing routines.

What's Included

  • (1) ET310 Digital Circuit Breaker Locator Receiver
  • (1) GFCI Outlet Tester / Signal Transmitter Module
  • (1) Screw-In Light Socket Adapter Lead
  • (1) 3-Prong to 2-Prong Grounding Plug Adapter
  • (1) Heavy-Duty Alligator Clip Lead Assembly
  • (1) Industrial-Grade 9V Alkaline Power Cell
  • (1) Premium Protective Hard Carrying Case with Fitted Foam Insert Matrix

Technical Specifications

Specification Value
Brand Name Klein Tools
Model Number ET310KIT
Device Segment Class Digital Circuit Breaker Finder Kit with Receptacle Tester
Primary Field Utility Breaker Identification, GFCI Device Tripping, Line Fault Diagnosis
Operating Voltage Scope 90 - 120V AC Alternating Current
Safety Certification Rating CAT II 120V Standard
Certified Drop Protection 6.6 ft.
Power Cell Requirement 1 x 9V Standard Battery (Receiver)
Housing Material Blend Impact-Resistant PC-ABS Hard Polycarbonate Compound
Overall Kit Box Length 10.96 in.
Overall Kit Box Width 1.39 in.
Overall Kit Box Height 2.16 in.
Net Pack Weight 1.27 lbs.

Pro-Tip: When diagnosing highly crowded utility panelboards, execute an initial calibration scan down the entire breaker rail row first. The ET310 receiver continuously learns internal magnetic signal coefficients to filter out cross-talk lines, ensuring an accurate audio alert when passing over the targeted breaker core during your second pass.