Klein Tools RT250 GFCI Receptacle Tester Backlit LCD Display Voltage Reading Fault Detection Auto-Hold Feature 3-Wire 120V Outlet Testing Pro Grade

Precision Electrical Diagnostics: The Klein Tools RT250 LCD GFCI Receptacle Tester

The Klein Tools RT250 is a sophisticated electrical diagnostic tool designed for professional electricians, home inspectors, and DIY enthusiasts who demand more than a simple light-sequence tester. Specifically engineered for North American 3-wire 120V electrical outlets, this tester features a large, easy-to-read backlit LCD that provides real-time voltage readings and clear, descriptive wiring fault identifications. Beyond standard outlet testing, the RT250 is an essential tool for inspecting GFCI devices, providing a precise digital readout of the exact time required to trip the ground fault circuit interrupter. Whether you are verifying a new installation or troubleshooting an older home, the RT250 ensures your electrical systems are safe, compliant, and functioning correctly.

Engineered for efficiency and jobsite durability, the RT250 includes a patent-pending detection system for complex Open Neutral and Open Ground wiring faults. One of its most standout features is the Auto-Hold functionality, which is incredibly useful when testing outlets in hard-to-reach areas or behind furniture; the display retains the reading so you can view it safely after removing the tester. Integrated bright green and red LEDs complement the digital display for instant visual confirmation, while the rugged ABS housing is drop-protected up to 6.6 feet (2 meters). Compact enough to fit in a pocket but powerful enough for industrial use, this CAT II 135V rated tester is the definitive solution for comprehensive receptacle health checks.

Key Features

• Backlit LCD Display: Provides clear voltage readouts and identifies wiring faults in plain text for easy interpretation.
• GFCI Trip Time: Measures and displays the exact time required to trip a GFCI device, ensuring safety compliance.
• Patent-Pending Fault Detection: Specifically detects and identifies "Open Neutral Open Ground" wiring faults.
• Auto-Hold Function: Automatically holds the reading on the display, perfect for testing outlets in restricted or dark spaces.
• Visual LED Indicators: High-visibility green and red LEDs provide immediate pass/fail status of the outlet wiring.
• Jobsite Tough: Constructed from durable ABS with 6.6-foot (2-meter) drop protection and a CAT II 135V safety rating.

What's Included

• (1) RT250 GFCI Receptacle Tester with LCD
• (2) 1.5V AAA Alkaline Batteries
• (1) User Manual

Specifications

Pro-Tip: When testing GFCI outlets, a trip time between 25ms and 40ms is typical for a healthy device. If the RT250 shows a trip time significantly higher or fails to trip the device, the GFCI is likely faulty and should be replaced immediately to ensure user safety from electrical shocks.