Best Uni T Electrical Testers in 2026

Green LED indicates tester is ready for use

BUILT-IN FLASHLIGHT: this non contact AC voltage detector features a built-in flashlight for user convenience in dim lighting

QUICKLY checks for the presence of live voltage on outlets, wiring, circuit breakers, lighting fixtures and switches

CAT IV 600V SAFTEY RATING, UL and CUL listed

Not designed for use with Tamper Resistant (TR) outlets

RUGGED IP67 WATERPROOF and dust tight housing with a 6' drop test rating

MULTI-FUNCTIONAL this electric tester features a built-in forward and rear facing flashlight for user convenience

The tester will not detect voltage if the voltage is DC; Wire is shielded or in a grounded metal box or conduit; the user is not grounded or is isolated from earth ground; the detector tip cannot be fully inserted into the electrical outlet; the electrical outlet is a Tamper Resistant design; the user is not holding the detector or the user’s hand is insulated from the detector (i.e. with a glove); the voltage source or wire is partially buried.

CONVENIENT THIRD-HAND TEST PROBE HOLDER: The clip on the back of the clamp meter allows you to hold a test lead in one hand and the meter and the other test lead in your other hand making the testing process easier

BUILT IN WORK LIGHT: The built-in work light is an extra convenience feature that allows visibility even in dimly lit areas

WHAT INCLUDED: Carrying case, clamp meter, test leads, type K temperature probe with banana plug adapter, AAA batteries and instruction manual

FASTER PROJECT TIMES: The 40040S can be used to trace up to 3 cables at one time. This eliminates the need to go back and forth, saving time and money.

WHAT’S IN THE BOX: The 40040S: Pro Continuity Tester with Remote and 9 volt battery included.

SATISFACTION GUARANTEED: At Southwire, we strive to ensure that every product we develop helps increase safety, improve productivity, reduce manpower, save time and save money - both on and off the jobsite. After all, we don't just want to produce the most products. We want to produce the best products.

ENHANCED FEATURES: This multimeter features an intuitive menu, hi-Res color display with graphing feature, an onboard memory for saving and viewing measurements and recordings. Rugged meter with CAT IV 600V / CAT III 1000V.

MApp MOBILE APP FEATURES: View readings from a safe distance right from your mobile phone, Set up recording sessions, Add photos and notes to create a detailed report, Pull-up menu to modify meter settings remotely and E-Mail critical equipment issues to maintenance.

PRECISE READINGS: This voltage tester features True-RMS for higher accuracy on AC circuits with harmonic distortion and Low-z eliminates false readings from 'ghost Voltage'.

IP67 RATED: The 14090T has a job to do- and it won't be stopped by dust or water. The multimeter features a rugged housing, and is IP67 rated to be water resistant and dustproof so that it can stand up to the most demanding environments.

SATISFACTION GUARANTEED: At Southwire, we strive to ensure that every product we develop helps increase safety, improve productivity, reduce manpower, save time and save money - both on and off the jobsite. After all, we don't just want to produce the most products. We want to produce the best products.