Klein Tools Non-Contact Voltag...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$112.77
$60.70
Klein Tools NCVT-4IR Non-Contact Voltage Tester Pen, 12-1000 AC V with Infrared Thermometer

Klein Tools Non-Contact Voltage Tester with Infrared Thermometer 12-1000V AC CAT IV Professional HVAC Tool

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Model: NCVT-4IR
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$60.70
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Klein Tools Non-Contact Voltage Tester with Infrared Thermometer 12-1000V AC CAT IV Professional HVAC Tool

Professional dual-function testing tool for HVAC and electrical applications

The Klein Tools Non-Contact Voltage Tester with Infrared Thermometer combines essential testing capabilities in one compact, professional-grade instrument. Designed specifically for HVAC applications, this CAT IV 1000V rated tool provides non-contact voltage detection from 12-1000V AC with integrated IR thermometer functionality. The lightweight design with pocket clip and IP54 ingress protection ensures reliable performance in demanding field conditions.

Professional Features & Benefits

  • 12-1000V AC Detection Range: Safely identifies voltage presence in cables, cords, circuit breakers, switches, outlets and wires without direct contact
  • Integrated IR Thermometer: 4:1 distance-to-spot ratio thermometer measures -22 to 482�F (-30 to 250�C) with convenient laser pointer targeting
  • CAT IV 1000V Safety Rating: Professional-grade safety certification for use in high-voltage electrical environments and installations
  • IP54 Ingress Protection: Dust and water resistance with screw-thread battery cap and O-ring seal for reliable field operation
  • Backlit LCD Display: Clear readings with 0.1-degree resolution and visual/audible voltage indicators for enhanced visibility
  • Extended Battery Life: Auto power-off feature provides average 134-hour operation with 2 x AAA batteries
  • 6.6' Drop Protection: Rugged construction withstands jobsite conditions while maintaining compact 2.00 oz weight

Technical Specifications

  • Batteries: 2 x AAA
  • Battery Life: Average - 134 hr; Continuous IR - 64 hr
  • Department: Electrical
  • Drop Protection: 6.6' (2 m)
  • Frequency: 50 - 500 Hz
  • Ingress Protection: IP54
  • Item Depth: 6.2600 in
  • Item Height: 1.2100 in
  • Item Weight: 0.1120 lbs
  • Item Width: 1.0800 in
  • Overall Height: 1.19" (3 cm)
  • Overall Length: 6.25" (15.9 cm)
  • Overall Width: 1.25" (3.2 cm)
  • Product Details: Non-Contact
  • Product Group: Test & Measurement
  • Product Subgroup: Electrical Testers
  • Product Type: Non-Contact
  • Product Voltage: 12 - 1000V AC
  • Standard: CAT IV 1000V
  • Weight: 2.00 oz (57.00 g)

Professional Applications

  • HVAC System Troubleshooting and Maintenance
  • Electrical Panel and Circuit Testing
  • Commercial Building Maintenance
  • Industrial Equipment Diagnostics
  • Security and Communications System Installation
  • Environmental Control System Service
  • Irrigation System Electrical Testing

Why Choose Klein Tools Quality?

Klein Tools delivers professional-grade reliability with CAT IV 1000V safety certification and IP54 ingress protection. The rugged construction with 6.6' drop protection and extended 134-hour battery life ensures dependable performance in demanding field conditions, backed by Klein Tools' commitment to professional electrical testing equipment.

Manufacturer Resources

Spec Sheet

Product Specs

Batteries:
2 x AAA
Battery Life:
Average - 134 hr; Continuous IR - 64 hr
Drop Protection:
6.6' (2 m)
Frequency:
50 - 500 Hz
Ingress Protection:
IP54
Item Depth:
6.2600 in
Item Height:
1.2100 in
Item Weight:
0.1120 lbs
Item Width:
1.0800 in
Overall Height:
1.19" (3 cm)
Overall Length:
6.25" (15.9 cm)
Overall Width:
1.25" (3.2 cm)
Standards:
CAT IV 1000V
Department:
Electrical
Product Group:
Test & Measurement
Product Subgroup:
Voltage Testers
Product Type:
Non-Contact Voltage Tester
Product Voltage:
12 - 1000V AC
Product Details:
Non-Contact
Product Weight:
2.00 oz (57.00 g)
Product Width:
1.08 in
Product Depth:
6.26 in
Product Height:
1.21 in
Voltage Rating:
12-1000V

Klein Tools NCVT-4IR – Frequently Asked Questions

1) Is this Klein voltage tester rated for use inside a service panel or at the meter?
The NCVT-4IR carries a CAT IV 1000V rating, which covers the utility-service side of an installation including service entrance, meter, and outdoor drops, as well as everything downstream. That is the highest of the four measurement categories, so panel and branch-circuit work is inside its rating.
2) Is one tester enough for an HVAC tech, or do I still need a separate IR gun?
For a service call, the NCVT-4IR covers both jobs: confirm a circuit is live or dead without touching a conductor, then take surface temperatures on the same tool. It is a pen-style instrument at 6.25 inches long and 2.00 oz with a pocket clip, so it replaces carrying a separate voltage pen and a small IR gun. What it does not do is give you a numeric voltage reading, resistance, or amperage, so it supplements a multimeter and clamp meter rather than replacing them.
3) Does it tell me how much voltage is present, or just whether a wire is hot?
It is a presence detector, not a meter. The NCVT-4IR signals live AC between 12 and 1000 volts with both visual and audible indicators, so you know a conductor, outlet, breaker, switch, or cord is energized without contacting it. It does not display a voltage value. When you need the actual number, or need to verify a true dead circuit before working on it, follow up with a contact meter.
4) Can I use this tester on a 400 Hz or variable-frequency circuit?
Detection is specified over 50 to 500 Hz, so a 400 Hz aircraft or generator circuit is inside that window along with standard 50/60 Hz power. Drive output frequencies that run outside 50 to 500 Hz are not covered by the stated range.
5) What temperature range does the IR thermometer on the NCVT-4IR cover?
It reads -22 to 482 degrees F (-30 to 250 degrees C) at 0.1 degree resolution on a backlit LCD. That spans refrigerant line and evaporator temperatures at the low end and hot ductwork, motor housings, and overheating breaker terminals at the high end. It will not read flue gas or combustion chamber temperatures, which run past 482F.
6) Will this tester survive being dropped off a ladder or used in wet conditions?
Drop protection is rated to 6.6 feet (2 m), and ingress protection is IP54, which means dust-protected and shielded against water splashing from any direction. The battery cap uses a screw thread with an O-ring seal to hold that rating. IP54 is splash and rain resistance, not submersion, so do not dunk it in a condensate pan.
7) What is the exact Klein part number to order this voltage tester and IR thermometer?
Klein Tools NCVT-4IR. That is the single model for this pen-style non-contact voltage tester with built-in infrared thermometer, 12-1000V AC, CAT IV 1000V. There are no finish, range, or configuration variants to specify, so the model number alone is the complete order.
8) What batteries does the Klein NCVT-4IR take and how long do they last?
Two AAA cells, user-replaceable through a screw-thread cap. Klein rates average battery life at 134 hours, dropping to 64 hours if you run the infrared thermometer continuously. Auto power-off helps stretch that in normal service use. For an MRO stockroom standardizing consumables, AAA is the same cell used across most pen testers, so no special battery to shelve.
9) Will it fit in a shirt pocket with my other tools?
Yes. The body measures 6.25 inches long, 1.25 inches wide and 1.19 inches high, weighs 2.00 oz, and has a pocket clip, so it rides in a shirt pocket or pouch the same way a plain voltage pen does.
How fast can I get the Klein Tools NCVT-4IR delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Klein Tools NCVT-4IR come with a warranty?
Absolutely. The Klein Tools NCVT-4IR is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Klein Tools NCVT-4IR?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Klein Tools NCVT-4IR from ZenSupply?
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