Non-contact voltage detector basics

15 May 2019 | Electrical

Voltage presence is useful information to have when troubleshooting or working on a failed asset. The first tool you’ll reach for is a non-contact voltage detector, also known as a voltage tester. These pocket-sized detectors immediately identify the presence of voltage.

Fluke non-contact voltage detector

Certified up to CAT IV 1000 V, the Fluke non-contact voltage detectors are rugged, safe and easy to use. A built-in sensor at the tip of the tool detects the presence of voltage when touching a conductor, outlet or supply cord. By holding the detector, you are the ground reference through capacitive coupling. When the tip glows red and the unit beeps, you know voltage is present.

Compare non-contact voltage detectors

Fluke offers five tools in the non-contact voltage detector family. Testers that detect 20 to 90 volts, 90 to a thousand volts and the LVD2, which incorporates a flash light and detects up to 600 volts. Below is an easy-to-read comparison chart of all five tools.

ModelsFluke Non-Contact Voltage Detector Family
Basic features
Voltage range90 V ac to 1000 V ac90 V ac to 1000 V ac20 V ac to 90 V ac90 V ac to 600 V ac40 V ac to 300 V ac
On/off buttonX XXX
Always on X   
Audible alertX X  
Flashlight   XX
Dual sensitivity   XX
Warranty and electrical safety
Warranty (years)22221
Safety ratingCAT IV 1000 VCAT IV 1000 VCAT IV 1000 VCAT IV 600 VCAT III 300 V

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