Klein Non-Contact Voltage Tester with Signal Strength, 12-1000V AC (NCVT7)
Klein Non-Contact Voltage Tester with Signal Strength, 12-1000V AC (NCVT7)
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Product Details
Product Details
Key Features
Overview
The Klein Tools Non-Contact Voltage Tester with Signal Strength, 12-1000V AC (NCVT7) detects AC voltage without touching the conductor. This is a non-contact voltage tester designed for electricians, maintenance techs and HVAC installers who need a quick, safe check on cables, cords, circuit breakers, lighting fixtures, switches, outlets and wires before they work. Klein model NCVT7 senses 12 to 1000V AC across 50 to 500 Hz.
The bar graph LCD is what sets it apart from a basic beeper. The display shows signal strength: more bars light up as voltage increases or as the tip gets closer to the source. That makes it practical for tracing, not just yes-or-no checks. Sweep along a bundle and the bars tell you which conductor is the strongest source, or follow a cord to find where the voltage stops.
Feedback comes three ways. The LED tip glows green when no voltage is detected, blue for low signal strength and red for high signal strength. The audible alert adjusts its rate to match the bar graph, and it is adjustable for noise-sensitive spaces. The LCD is backlit, so it stays readable in a dark panel or ceiling.
Klein builds it for daily carry: a slim pocket clip, a polymer body that is about 5-13/16" long x 1" wide x 1-3/16" tall (14.7 x 2.5 x 3 cm), and a weight of 2 oz (56 g). It is rated IP54 for dust and water spray and drop-protected to 6.6 ft (2 m). Two AAA batteries are included and Klein rates battery life at 142 hours, with auto power-off to save them. Working temperature is 32-122°F (0-50°C). It conforms to UL 61010-1 and 61010-2-030 and is certified to CSA C22.2 No. 61010-1 and 61010-2-030.
Who should buy it: electricians and apprentices who want more information than a single beep, maintenance and facilities techs tracing circuits, and HVAC and low-voltage installers who work around both control voltage and line voltage.
See How Close You Are
The bar graph climbs as you get closer to the source, so you can pinpoint the hot conductor instead of guessing from a beep.
- Bar graph signal strength display
- More bars as voltage rises or distance closes
- Backlit LCD for dark spaces
Read It Without Looking at the Screen
The tip color tells the story: green for no voltage, blue for low signal, red for high.
- Green: no voltage detected
- Blue: low signal strength
- Red: high signal strength
Hear It, Too
The alert rate tracks the bar graph, faster as signal increases, and the volume is adjustable.
- Audible rate matches signal strength
- Adjustable audible alert
- Auto power-off
Clips In, Goes Everywhere
A slim clip keeps it secure in a shirt pocket so it is always within reach.
- Slim pocket clip
- 2 oz (56 g)
- IP54, drop-protected to 6.6 ft (2 m)
What's in the Box
- Non-contact voltage tester
- (2) AAA batteries
Key Specifications
| Voltage Range | 12-1000V AC |
|---|---|
| Frequency | 50-500 Hz |
| Indicators | Bar graph LCD, 3-color LED tip, audible alert |
| Display | Backlit LCD |
| Ingress Protection | IP54 |
| Drop Protection | 6.6 ft (2 m) |
| Batteries | (2) AAA, included |
| Battery Life | 142 hours |
| Auto Power-Off | Yes |
| Working Temperature | 32-122°F (0-50°C) |
| Standards | UL 61010-1, 61010-2-030; CSA C22.2 No. 61010-1, 61010-2-030 |
| Dimensions (L x W x H) | 5-13/16" x 1" x 1-3/16" (14.7 x 2.5 x 3 cm) |
| Weight | 1.97 oz (56 g) |
Built For
Pro Tip
Use the bar graph to trace, not just test. Hold the tip on a cord or cable and slide along it; where the bars drop off is where the voltage stops, which is handy for finding a break or a switched leg.
Tool Nut's Take
A Voltage Tester That Tells You How Much
The Klein Tools Non-Contact Voltage Tester with Signal Strength, 12-1000V AC (NCVT7) adds a signal strength bar graph to the everyday pocket tester, so you get proximity, not just presence.
- Who it's for: Electricians, maintenance techs and HVAC installers who check and trace circuits daily.
- Why it stands out: 12-1000V AC range, bar graph signal strength, 3-color tip and a backlit screen in a 2 oz pen.
- Worth knowing: It detects AC only and does not measure an exact voltage. Confirm with a meter before you call a circuit dead.
Common Questions
- What voltage range does the Klein NCVT7 detect? 12 to 1000V AC, from 50 to 500 Hz.
- Does it detect DC voltage? No. Klein lists it for AC voltage.
- What do the LED colors mean? Green means no voltage detected, blue means low signal strength and red means high signal strength.
- Are batteries included? Yes. Two AAA batteries are included, with a rated battery life of 142 hours.
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