A studio product shot of the Klein Tools RT250KIT Premium Electrical Test Kit. The kit features the RT250 GFCI Receptacle Tester with a digital LCD screen and the NCVT3P Dual-Range Non-Contact Voltage Tester with an integrated flashlight, both in high-visibility orange and black industrial housings.
Product infographic for the RT250 GFCI Receptacle Tester highlighting its digital diagnostic capabilities. Text callouts emphasize the large backlit LCD for easy viewing of voltage, the unique time-to-trip measurement for GFCI devices, and the patent-pending detection of simultaneous open neutral and open ground wiring faults.
Marketing graphic for the NCVT3P Dual-Range Non-Contact Voltage Tester. The image details the dual-range detection of 12-1000V AC and 70-1000V AC, the integrated bright flashlight that operates independently, and the high-intensity visual and audible indicators for safe circuit identification.
An angled studio shot of the RT250 LCD Receptacle Tester. The image highlights the ergonomic handheld design, the 3-prong North American electrical plug, and the high-contrast faceplate that displays a wiring fault legend for rapid circuit troubleshooting.
A side-angle perspective of the RT250 tester focusing on the integrated tactile buttons for GFCI testing. The rugged orange polymer housing and the compact, portable form factor are emphasized for professional electricians and home inspectors.
A front view of the NCVT3P dual-range voltage tester pen. The image showcases the sleek pen-style design with a heavy-duty black pocket clip, clear sensing tip, and dedicated power and flashlight buttons on the yellow industrial body.
The Klein Tools NCVT3P voltage tester shown with its screw-thread battery cap removed. This view highlights the internal compartment for two AAA batteries and the durable O-ring seal designed to provide dust and water resistance on the jobsite.
Action shot of the RT250 Receptacle Tester plugged into a standard residential wall outlet. The backlit LCD is active, displaying a precise real-time voltage reading of 121V and confirming a correct wiring condition with clear text indicators.
Action shot showing a technician using the NCVT3P non-contact tester to verify power at an electrical junction box. The integrated LED flashlight is activated to illuminate the workspace, while the sensing tip identifies a live wire without making physical contact.
A comprehensive technical comparison chart for the Klein Tools non-contact voltage tester family. The table compares the NCVT3P against other models like the NCVT6 and NCVT4IR, detailing specifications such as IP ratings, drop protection, and dual-range sensitivity.
GFCI Receptacle Tester with LCD, RT250 promotional how to video
A studio product shot of the Klein Tools RT250KIT Premium Electrical Test Kit. The kit features the RT250 GFCI Receptacle Tester with a digital LCD screen and the NCVT3P Dual-Range Non-Contact Voltage Tester with an integrated flashlight, both in high-visibility orange and black industrial housings.
Product infographic for the RT250 GFCI Receptacle Tester highlighting its digital diagnostic capabilities. Text callouts emphasize the large backlit LCD for easy viewing of voltage, the unique time-to-trip measurement for GFCI devices, and the patent-pending detection of simultaneous open neutral and open ground wiring faults.
Marketing graphic for the NCVT3P Dual-Range Non-Contact Voltage Tester. The image details the dual-range detection of 12-1000V AC and 70-1000V AC, the integrated bright flashlight that operates independently, and the high-intensity visual and audible indicators for safe circuit identification.
An angled studio shot of the RT250 LCD Receptacle Tester. The image highlights the ergonomic handheld design, the 3-prong North American electrical plug, and the high-contrast faceplate that displays a wiring fault legend for rapid circuit troubleshooting.
A side-angle perspective of the RT250 tester focusing on the integrated tactile buttons for GFCI testing. The rugged orange polymer housing and the compact, portable form factor are emphasized for professional electricians and home inspectors.
A front view of the NCVT3P dual-range voltage tester pen. The image showcases the sleek pen-style design with a heavy-duty black pocket clip, clear sensing tip, and dedicated power and flashlight buttons on the yellow industrial body.
The Klein Tools NCVT3P voltage tester shown with its screw-thread battery cap removed. This view highlights the internal compartment for two AAA batteries and the durable O-ring seal designed to provide dust and water resistance on the jobsite.
Action shot of the RT250 Receptacle Tester plugged into a standard residential wall outlet. The backlit LCD is active, displaying a precise real-time voltage reading of 121V and confirming a correct wiring condition with clear text indicators.
Action shot showing a technician using the NCVT3P non-contact tester to verify power at an electrical junction box. The integrated LED flashlight is activated to illuminate the workspace, while the sensing tip identifies a live wire without making physical contact.
A comprehensive technical comparison chart for the Klein Tools non-contact voltage tester family. The table compares the NCVT3P against other models like the NCVT6 and NCVT4IR, detailing specifications such as IP ratings, drop protection, and dual-range sensitivity.
GFCI Receptacle Tester with LCD, RT250 promotional how to video
KLEIN TOOLS

Klein Tools RT250KIT Premium Electrical Test Kit with RT250 LCD GFCI Receptacle Tester and NCVT3P Dual Range Non-Contact Voltage Detector Flashlight

Only 2 left
SKU: RT250KIT
$39.97

Description

Klein promotional logo logout

Advanced Circuit Diagnostics: The Klein Tools RT250KIT Premium Safety Duo

The Klein Tools RT250KIT is a high-performance diagnostic powerhouse designed for electricians and inspectors who require more than just basic circuit testing. This premium kit features the RT250 GFCI Receptacle Tester with a large backlit LCD and the NCVT3P Dual-Range Non-Contact Voltage Tester with an integrated flashlight. The RT250 is a game-changer in electrical safety, providing real-time voltage readouts and identifying complex wiring faults including a patent-pending detection for simultaneous Open Neutral and Open Ground conditions. Whether you are certifying a new commercial build or troubleshooting a residential renovation, this kit provides the digital precision needed to verify circuit integrity and calculate the exact time required to trip a GFCI safety device.

Engineered for versatility in the field, the NCVT3P volt pen offers dual-range detection (12–1000V AC or 70–1000V AC), allowing you to safely transition between low-voltage systems like thermostats and standard residential mains. Both tools are built to withstand the rigors of the jobsite with 6.6-foot drop protection and high-visibility industrial housings. The integrated flashlight on the NCVT3P operates independently of the voltage sensor, ensuring you can illuminate dark junction boxes and panels before you begin your diagnostics. With a high safety rating of CAT IV 1000V on the voltage tester, this kit delivers the ultimate combination of user protection, technological advanced features, and professional-grade durability.

Key Features

  • Backlit LCD Diagnostics: Large digital display provides real-time voltage readings and identifies wiring faults instantly.
  • GFCI Trip Timer: Measures and displays the specific time (in milliseconds) required to trip a ground fault circuit interrupter.
  • Dual-Range Detection: NCVT3P identifies 12–1000V AC or 70–1000V AC for low-voltage or standard electrical applications.
  • Patent-Pending Technology: Specialized detection for complex "Open Neutral / Open Ground" simultaneous wiring errors.
  • Integrated Flashlight: High-output flashlight illuminates work areas and can be used with or without voltage detection active.
  • Jobsite Ruggedness: Impact-resistant construction built to survive a 6.6-foot (2m) drop on professional jobsites.

What's Included

  • (1) RT250 Electrical Receptacle Tester with LCD
  • (1) NCVT3P Dual Range Non-Contact Voltage Tester with Flashlight
  • (4) AAA Batteries
  • (1) Heavy-Duty Storage Pouch
  • (1) Set of Instruction Manuals

Specifications

Volt Pen Range 12 to 1000V AC / 70 to 1000V AC
LCD Tester Voltage 135V AC Maximum
NCVT Safety Rating CAT IV 1000V
RT250 Safety Rating CAT II 135V
Drop Protection 6.6 ft.
Display Type Backlit Digital LCD (RT250)
Batteries Required 4 x AAA (Included)
Special Indicators Simultaneous Visual and Audible Alarms
Kit Overall Length 9.13 in.
Kit Overall Width 5.13 in.
Kit Overall Height 2.75 in.
Total Kit Weight 9.9 oz.

Pro-Tip: When using the RT250 to check GFCI trip times, verify the standard voltage reading first. If your supply voltage is significantly lower than 120V (e.g., under 108V), the GFCI may take longer to trip, which could lead to a false "Fail" interpretation. Always ensure the circuit has a stable supply for the most accurate timing results.