Klein Tools NCVT1XT Non-Contact Voltage Tester, 70 to 1000V AC

No. Klein specifically does not recommend the NCVT1XT for testing tamper-resistant receptacles. The shutters in a TR outlet keep the probe tip far enough from the energized contacts that the sensor may not pick up the field. For TR outlets, use the NCVT-2P or NCVT-3P in low voltage mode instead. On standard non-TR outlets, cords, breakers, switches, lighting fixtures and wires the NCVT1XT works as intended from 70 to 1000V AC.

Yes. The NCVT1XT carries a CAT IV 1000V safety rating, which covers the utility service entrance, the meter, and the line side of the main panel, as well as everything downstream. Pollution degree is 2, the normal indoor rating. Detection range is 70 to 1000V AC at 50 to 500 Hz, so it covers standard 60 Hz branch circuits and higher-frequency drive or generator output within that band.

No, and this is the one that hurts people. Klein's own warning on the NCVT1XT states never to assume neutral or ground wires are de-energized. Neutrals in multi-wire branch circuits can be energized when disconnected and must be retested before handling. A non-contact pen detects the presence of an AC field from 70V up, it does not prove absence of voltage. For lockout/tagout verification use a contact meter and test-verify-test.

No. Detection starts above 70 V, so 24V control wiring, thermostat cable, doorbell transformers and 12V landscape runs will not trigger it. For low voltage work you want a tester with a dedicated low voltage mode, such as Klein's NCVT-2P or NCVT-3P. The NCVT1XT is a line-voltage tool: 70 to 1000V AC, 50 to 500 Hz.

It is built for it. The NCVT1XT is dustproof and waterproof to IP67, meaning sealed against dust and able to withstand temporary immersion, and it is rated for a 9.8 foot (3 m) drop. That covers a fall from a typical ladder or scissor lift platform and rain or wet-trench exposure on outdoor and rough-in work. The housing is polymer.

Two different LEDs. A bright green LED tells you the tester is powered up and working, so you are not holding a dead pen and reading a false safe. When it picks up voltage, a bright red LED lights and an audible tone sounds. It also has a low battery indicator and auto power-off to stretch battery life.

It ships ready to use with instructions and two AAA 1.5 volt batteries included. Replacements are standard AAA cells, and the battery compartment is designed for easy access so a crew can swap them in the field without tools hunting.

Yes. It is a pen-style tester measuring 5.34 inches long, 1.08 inches wide and 0.97 inches high, weighing 0.052 lbs, with a pocket clip. That is light enough to forget it is there and short enough not to stick out of a pocket like a meter probe.

Klein Tools catalog number NCVT1XT. It is a single-model item, no finish, range or option choices to specify, so a fleet order is just quantity against that one MPN. That makes it straightforward for a maintenance department or contractor stocking one tester per truck or per tech.