Klein Tools RT110 Outlet Tester, AC Electrical Receptacle Tester for North American Outlets

Works perfectly, live in an older house, was not sure if the groud was good or not, tested correctly.

I had bought something that I read some reviews that they were not properly grounded; so I wanted to test the grounds myself…this showed me that the grounds were correct putting my mind at ease! Simple and easy! Works perfectly!

Works good. Easy to understand

so far, so good; works as advertised

I was replacing a previous unit which now receives on a modest review score. So I read reviews of several models before buying this one. Of course, it it not possible to confirm that it is working properly unless you intentionally mis-wire an outlet to see what it shows. I did not do this, which explains the 4-star rating I gave it for Accuracy; it may well deserve 5 stars. However I can report that the display is easily visible and shows that the power outlets I tested were all good (no faults). It seems well made and should not crack apart unless stressed greatly. I did not do this either!

Good outlet tester for checking for live power. Speed is instant read with simple instructions

I’ve always liked this brand and have bought several of their products through Amazon. I use this outlet tester constantly as a quick visual check to confirm our ESD protective mats are properly grounded for sensitive circuit‑chip work. Electricians have told me that older versions of testers like this used to overheat or fail internally, and I remember experiencing that years ago too — but times have definitely changed. This model has been excellent. I’m approaching 5+ years with it, and it’s still working reliably.

turn off main breaker when working in the breaker box. tests basic functionality at a 120 volt AC outlet . 110 to 125 volt , 50 hz , 60 hz the quality at the outlet may not be fully know . a DVM digital volt meter will be needed to measure for any possible voltage on Ground . i fixed the issue before i received this tester . last year i had 2.5 volts on ground. recently i was measuring 6 volts on ground . Earth ground Rod to ground bus bar , 6 volts Earth ground Rod to neutral wire , 0 volts neutral bus bar to ground bus bar , 6 volts . breaker box , looked like it had been wired correctly . then i heard about the Green Bonding Screw . the Green Bonding Screw is a single point tie point that connects ties ground bus bar and neutral bus bar . the Green Bonding Screw is found on the neutral bus bar in the breaker box . tightened the Green Bonding Screw a couple of thread pitches . 0 volts , perfect . the contracter installers did NOT check verify their work . Ground bus bar was tied to breaker panel Neutral bus bar was tied to Earth ground Rod. however , the ground bus bar was NOT touching the neutral bus bar . By intention , the Neutral bus bar does NOT touch the breaker panel . instead , the Green Bonding Screw is ALL important to provide the single point contact ( helps to prevent ground loops to ) i got this outlet tester for trivial use when something doesn't check good , you will need a DVM digital volt meter to do some actual troubleshooting . breaker box needs to work first : 3 measurements: earth ground rod to neutral bus bar , 0 volts earth ground rod to ground bus bar , 0 volts neutral bus bar to ground bus bar , 0 volts each outlet has 3 measurements : hot to neutral , 120 volts ( same )* hot to Gnd , 120 volts ( same )* neutral to Gnd , 0 volts .

Does what it says. Simple, efficient

Works. Easy to use. No issues.

Muy buen producto, me ha ayudado mucho a instalaciones eléctricas para hacer comprobaciones rápidas. Lo recomiendo mucho sin problemas, posiblemente lo único malo es que las instrucciones no están en español solo ingles, no tengo problemas para leerlo pero seria bueno tenerlo en español de igual manera.

The tool did it's job, helps to make sure your electrical outlets are up to code. Good tool to have in your tool box. Easy to use; instructions are on the tool, indicator lights are self explanatory.

Sin duda el mejor comprobador de contactos de pared viene un instructivo en español su calidad certificada lo hace el número 1 lo recomiendo totalmente viene su cajita para guardarlo solo recórtalo de las orillas al abrirlo por primera vez lo más importante no usa pilas ni nada de para recargar los leds de los indicadores, sin duda la mejor compra.