As an American manufacturer of hand for more than 160 years, makes premium-quality, professional-grade that deliver performance, durability and precision. Our team continues to put six generations of expertise into each tool by using the highest quality materials and superior workmanship.

doesn't just make great products, we make great products that stand up to the demands of the professionals who use them every day … Since 1857.

The RT250 is an electrical receptacle tester that tests the wiring conditions at an electrical outlet and inspects GFCI devices. The LCD displays the voltage, identifies the wiring fault, and the time required to trip a GFCI device. It is designated for use with North American 3-wire 120V electrical outlets.

GFCI electrical circuit tester inspects GFCI devices

Easy to read LCD display shows voltage, faults, GFCI trip time

Identifies common wiring faults on North American 120V outlets

From the manufacturer

The RT250 is an electrical receptacle tester that tests the wiring conditions at an electrical outlet and inspects GFCI devices. The LCD displays the voltage, identifies the wiring fault, and the time required to trip a GFCI device. It is designated for use with North American 3-wire 120V electrical outlets. For more than 160 years, has manufactured premium-quality, professional-grade hand that deliver the performance, durability and precision needed to get the job done right. Our family of engineers, workers and craftsman continue to put six generations of expertise into every tool we create by using only the highest quality materials, superior workmanship, and keeping manufacturing as close to home as we can. isn't just the name of our company, it's also our family name. And since we're an American company that's family-owned and family-run, you know you can count on us to be here tomorrow. doesn't just make great products, we make great products that stand up to the demands of the professionals who use them every day ... Since 1857.

Product Description