Klein Tools Circuit Analyzer 1...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$279.96
$237.51

Klein Tools Circuit Analyzer 120V AC AFCI GFCI Testing Digital Display Professional Grade

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Model: RT390
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$279.96
$237.51
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Klein Tools Circuit Analyzer 120V AC AFCI GFCI Testing Digital Display Professional Grade

Advanced Electrical Testing Equipment for Professional Diagnostics

The Klein Tools Circuit Analyzer delivers professional-grade electrical testing performance for comprehensive outlet diagnostics and safety device inspection. This ABS plastic construction testing instrument features large color LCD display technology designed for electricians, electrical contractors, and maintenance professionals, providing the reliable performance and industry-leading quality that tradesmen demand from America's most trusted tool manufacturer.

Professional Features & Benefits

Advanced Testing Capabilities

  • AFCI and GFCI Device Testing - Comprehensive inspection with trip time and trip current measurement for complete safety device analysis
  • Wiring Fault Detection - Identifies common wiring faults including dual-open neutral and ground conditions for thorough electrical diagnostics
  • Load Testing Performance - 12A, 15A, and 20A load testing capabilities measure percentage voltage drops for accurate circuit evaluation
  • Large Color LCD Display - Easy-to-understand results display shows wiring faults, device status, voltage readings, and trip timing for professional analysis

Safety and Durability Features

  • CAT III 135V Safety Rating - Professional safety certification ensures reliable operation in electrical environments with Klein Tools quality standards
  • Auto Power-Off Function - Automatically powers off after 5 minutes of inactivity to conserve battery life and extend operational time
  • Drop Protection Design - 6.6-foot drop protection with durable ABS plastic construction withstands jobsite conditions and professional use

Technical Specifications

Dimensions: 7.1 x 2.7 x 1.5 inches, Weight: 0.49 lbs, Voltage Rating: 135V AC, Safety Standard: CAT III 135V, Display: Large Color LCD, Power: 3 x AAA Alkaline Batteries, Drop Protection: 6.6 feet, Construction: ABS Plastic with Electronic Components, Detachable Cord: Yes for Easy Storage

Installation & Usage

  1. Connect circuit analyzer to standard North American 120V AC 3-wire electrical outlet using professional testing procedures
  2. Select appropriate testing mode on large color LCD display for wiring fault detection or safety device inspection
  3. Perform AFCI and GFCI testing with automatic trip time and current measurement for comprehensive device evaluation
  4. Execute load testing at 12A, 15A, or 20A settings to measure voltage drop percentages and circuit performance
  5. Review detailed results on color display showing wiring conditions, device status, and electrical measurements
  6. Store analyzer in included pouch with detachable cord for organized tool management and jobsite portability

Professional Applications

Ideal for:

  • Electrical Installation Testing - New construction outlet verification, wiring fault detection, and safety device commissioning
  • Maintenance and Troubleshooting - Routine electrical system inspection, AFCI/GFCI device testing, and circuit performance evaluation
  • Commercial Electrical Work - Office building electrical testing, retail facility maintenance, and industrial electrical diagnostics
  • Residential Electrical Service - Home electrical inspection, outlet testing, and safety device verification for electrical contractors
  • Code Compliance Verification - AFCI and GFCI testing for electrical code compliance and safety standard requirements
  • Electrical Troubleshooting - Voltage drop analysis, wiring fault identification, and electrical system performance assessment
  • Safety Device Inspection - Professional AFCI and GFCI testing with trip time measurement for comprehensive safety evaluation
  • Circuit Performance Analysis - Load testing and voltage drop measurement for electrical system optimization and diagnostics

Digital Display Technology Advantage

Klein Tools circuit analyzer features advanced color LCD display technology that provides clear, easy-to-understand results for complex electrical testing procedures. The large display shows comprehensive information including wiring fault conditions, AFCI/GFCI device status, trip timing, voltage measurements, and load testing results, enabling electrical professionals to quickly diagnose electrical system conditions and make informed decisions about electrical safety and performance.

Why Choose Klein Tools Quality?

Klein Tools has maintained its legacy of excellence since 1857 as America's premier electrical tool manufacturer, with unwavering commitment to professional safety standards, rigorous testing protocols, and trusted reliability for electrical professionals. This circuit analyzer represents Klein Tools' dedication to innovative electrical testing solutions, precision engineering, and the superior quality that electricians, electrical contractors, and maintenance professionals depend on for accurate electrical diagnostics and safe electrical work practices.



KLN-RT390 - spec sheet

Manufacturer Resources

Product Specs

Afci:
Yes
Application:
Test Wiring Faults, Inspects AFCI and GFCI Devices, Displays Line Voltage, Voltage Drop
Batteries:
3 x AAA Alkaline
Depth:
7.0720 in
Drop Protection:
6.6' (2m)
Gfci:
Yes
Height:
1.5080 in
Included:
Circuit Analyzer; 3 x AAA Batteries; Instructions; and Pouch
Material:
ABS Plastic, Overmold, Electronic Components
Overall Height:
7.1" (3.9 cm)
Overall Length:
1.5" (17.9 cm)
Overall Width:
2.7" (6.9 cm)
Standard:
CAT III 135V
Weight:
0.4880 lbs
Width:
2.7200 in
Category:
Circuit Analyzers
Product Type:
Circuit Analyzer
Department:
Electrical
Product Group:
Test & Measurement
Product Subgroup:
Electrical Testers
Product Voltage:
135V AC
Product Details:
Circuit Analyzer

Klein Tools RT390 – Frequently Asked Questions

How fast can I get the Klein Tools RT390 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Klein Tools RT390 come with a warranty?
Absolutely. The Klein Tools RT390 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Klein Tools RT390?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Klein Tools RT390 from ZenSupply?
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