Fluke BK120 SmartTrace Breaker Finder and Socket Tester

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Product guide

Fluke BK120 SmartTrace Breaker Finder and Socket Tester

Fluke BK120 SmartTrace combines a circuit breaker finder, non-contact voltage detector, socket tester and LED flashlight. Its receiver and transmitter are intended for circuit tracing and outlet checks, with audible and visual alerts for breaker locating.

At a glance

Four functions are listed: breaker finder, NCV detector, socket tester and bright LED flashlight.
Audible and visual alerts are claimed for locating a circuit breaker.
Dual-sensitivity NCV mode is specified for non-contact checks on terminal strips and supply cords.
The transmitter's socket tester uses LEDs to check wiring in standard and GFCI outlets.

Price

$89.96Save 19%

Reference price: ~~$110.39~~

Price checked: Nov 13, 2026

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Often bought together

Fluke 1AC II VoltAlert Non-Contact Voltage Tester, Pocket-Sized, 90-1000V AC, Audible Beeper, CAT IV Rating

$59.00

Fluke ST120+ GFCI Socket Tester with Audible Beeper

$44.95

Pros and cons

Pros

Combines breaker tracing with non-contact voltage detection and outlet checks in one listed tool.
The transmitter's visible LED indications and the receiver's audible and visual alerts provide more than one way to read results.

Technical specifications

4 specifications

Identity
Brand	Fluke
Model	FLUKE-BK120

Power
Power configuration	Corded Electric

Dimensions
Dimensions listed	27.9 x 15.2 x 5.7 centimetres

What to know before buying

Listing details to confirm

The feature description says the socket tester checks standard and GFCI outlets, while customer feedback reports mixed opinions about accuracy and dual-voltage capabilities. Treat those experiences as variable rather than a confirmed fault, and verify the tool's operating suitability for the intended electrical system.

What’s in the box

Included

BK120 receiver
Transmitter

Who is it for?

A good fit for

Electricians and maintenance users who want breaker tracing, NCV checks and outlet wiring checks in one tool.
Homeowners who need a listed tester for standard and GFCI outlets and can confirm the device suits their electrical system.

Less suited to

Buyers needing a general-purpose multimeter with documented measurement ranges beyond the listed breaker-finding and outlet-testing functions.

Fluke BK120 SmartTrace Breaker Finder and Socket Tester · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.6 / 5 · 689 ratings

5 stars82%82%
4 stars9%9%
3 stars3%3%
2 stars2%2%
1 star4%4%

Customer feedback is positive about quality, functionality and ease of using the socket tester, with functionality noted particularly alongside an NCV tester. Opinions are mixed on accuracy, value and dual-voltage capabilities. That makes the feedback relevant to users relying on breaker tracing and outlet checks, but it does not establish a specific fault or resolve suitability for a particular electrical system.

Positive themes

Customers describe the product positively for quality and functionality.
Customers report that the socket tester is easy to operate.

Mixed feedback

Customer opinions are mixed on accuracy, value for money and dual-voltage capabilities.

Frequently asked questions

What functions does the Fluke BK120 provide?

The listing describes it as a breaker finder, NCV detector, socket tester and LED flashlight. It also claims audible and visual breaker-location alerts.

Can it test GFCI outlets?

The transmitter is described as a socket tester for standard and GFCI outlets. Customer feedback reports mixed opinions about accuracy and dual-voltage capabilities, so confirm the tool fits your intended use.

What components are listed as included?

The manufacturer's included-components field lists a BK120 receiver and transmitter.