Add $175.00 for FREE shipping
Learn More!
Tool Type
Electrical Detectors
Audible Indicator
Battery Operated
LED Feedback
Visual Indicator
Ease of Installation
Beginner (Installs < 10 minutes)
Extech Instruments
Other Ways to Shop
In Stock
On Sale
Order the Smarthome Catalog

Locates Circuit Breakers and Tests Receptacle Wiring
Extech Instruments CB10 AC Circuit Breaker Finder and Receptacle Tester
Extech Instruments CB10 AC Circuit Breaker Finder and Receptacle Tester
Extech Instruments CB10 AC Circuit Breaker Finder and Receptacle Tester
Item# 90274
Price: Normally $39.99 
Hot Deal $34.99
Free shipping on orders over $175 - See Details


  • Quickly locate 110V to 125VAC Circuit Breakers and Fuses
  • Variable Sensitivity adjustment to pinpoint correct circuit breaker
  • Bright Red and Green LEDs indicates if receptacle is correctly wired or six fault conditions
  • Push button GFCI test
  • Audible and visual circuit breaker indication
  • Convenient storage position for transmitter/receptacle tester
  • Eliminates circuit interruptions

Essential Info

3-in-1 Tester - Circuit Breaker Finder, Circuit Tester, and GFCI Receptacle Tester.
Locates circuit breakers and tests receptacle wiring.

GFCI Transmitter - Tests GFCI circuits, LED indication of 2 test conditions and 5 wiring faults. Tests Reversed/Open Connections with lights to indicate circuit condition

What's Included

  • One Receiver
  • One GFCI Transmitter
  • 9V Battery for Receiver
  • More Info

    Locate branch circuit breakers without flipping breakers to other circuits
    Confirm proper wiring during electrical wiring installation or repair
    Test receptacle ground fault operation
    Adjustable sensitivity for pinpointing the correct breaker


    Transmitter and Receiver snap together for easy storage
    Receiver: 6.4x2.2x1.5" (162x55x38)/4oz (113g);
    Transmitter: 3.25x1.75x1" (83x44x25mm)/1.6oz (45g)

    Important notes:
    Defective exchanges for identical item within 30 days of purchase. After 30 days, please contact the manufacturer.
    Manufacturer contact information: Extech Instruments Corp, Tel: (781) 890-7440 Ext 200



    9-Volt Batteries       
    9-Volt Batteries       

    Related Items

    Customers Also Bought

    Sign-up for Exclusive Email offers 
    How to Order Track Your Package Shipping Returns Contact Us Customer Service Retail Store
    Getting Started Learning Center FAQ Dealers Customer Testimonials Affiliate Program
    About Us INSTEON Press Awards Employment Guarantees Security & Privacy
    Free Catalog Email Newsletter Forum RSS Site Map
    Have questions? Call us at 800-762-7846 (Mon-Fri 5am-7pm and Sat 6am-3pm PT) or send us a message
    Place your order by 3pm PT for same day shipping
    Copyright 1995-2014 SMARTHOME™
    Verisign Secure Site PayPal Acceptance Mark