Klein Tools Voltage Tester Pen NCVT3P Dual Range AC Detector (12V 1000V CAT IV IP67 Waterproof LED Flashlight Pocket Clip Electrical Diagnostic)
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Klein Tools NCVT3P Dual-Range Non-Contact Voltage Tester with Flashlight
The Klein Tools NCVT3P Dual-Range Non-Contact Voltage Tester detects AC electrical potentials from 12V to 1000V without breaking conductor insulation across residential, commercial, and industrial installations. Engineered with dual-sensitivity selection modes, this pocket test pen verifies low voltage (12V to 70V AC) in HVAC controls, doorbells, and irrigation lines as well as standard line voltage (70V to 1000V AC) in electrical outlets, distribution panels, and multi-wire branch circuits. Featuring a rugged IP67 waterproof housing, CAT IV 1000V overvoltage safety rating, and an independent LED worklight, this 1.9-ounce diagnostic detector equips electricians and facility technicians with instant audible and visual live-circuit verification.
Best Used For:
- Low-Voltage HVAC & Control Circuit Tracing: Detecting 12V to 70V AC signals in thermostat wiring, security sensors, relays, and landscape lighting systems.
- Industrial Panel & Breaker Verification: Verifying live conductors, branch circuit breakers, and industrial disconnect switches up to 1000V AC.
- Receptacle & Switch Troubleshooting: Checking wall outlets, romex bundles, and lighting switches for live AC voltage prior to maintenance.
Key Performance & Safety Features
- Dual-Range Voltage Detection: Toggles seamlessly between 12–70V AC low-voltage mode and 70–1000V AC standard electrical line mode.
- Escalating Audiovisual Alerts: Bright flashing LED indicators and audible alert tones increase in frequency as the sensor approaches voltage sources.
- Independent LED Flashlight: High-output forward-facing worklight illuminates dark electrical vaults and crawlspaces independently of testing functions.
- CAT IV 1000V Overvoltage Protection: Certified safety category for high-energy utility service entrances, industrial feeders, and switchboards.
- IP67 Dustproof & Waterproof Body: Sealed polycarbonate housing survives 6.6-foot drops, jobsite dust ingress, and full water submersion.
What's Included
- (1) Klein Tools NCVT3P Dual-Range Non-Contact Voltage Tester with Flashlight
- (2) Standard 1.5V AAA Alkaline Batteries
- (1) Integrated Heavy-Duty Pocket Clip
Technical Specifications
| Specification | Detail |
|---|---|
| Model Number / Part ID | NCVT3P (Voltage Tester Pen) |
| Low Voltage Detection Range | 12 V to 70 V AC |
| Standard Voltage Detection Range | 70 V to 1000 V AC |
| Frequency Response Range | 50 Hz to 500 Hz |
| Safety Measurement Rating | CAT IV 1000V |
| Ingress Protection Rating | IP67 (Submersible Waterproof & Dustproof) |
| Drop Protection Height | 6.6 ft (2.0 m) Drop Tested |
| Power Supply & Battery Life | 2 x AAA Alkaline (Up to 125 Hours Runtime) |
| Dimensions (L x W x H) | 5.70 in x 1.09 in x 0.93 in (144.8 x 27.7 x 23.6 mm) |
| Total Operating Weight | 1.90 oz (51.0 g with Batteries) |
| UPC Barcode Identifier | 092644693236 |
Pro-Tip: Always test the NCVT3P on a known energized circuit before and after checking target wiring; verifying that the power LED glows solid green confirms the internal circuit and batteries are fully operational prior to testing.