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Model #NCVT-4IR

Store SKU #1002841895

Store SO SKU #1002756913

Non-Contact Voltage Tester with Infrared Thermometer

$3999
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  • Voltage Tester provides non-contact determination of AC voltage
  • Volt Pen's compact design includes pocket clip for easy access
  • Tester offers infrared thermometer measurements
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Product Details

Visual Indicator

Visual Indicator

High intensity, bright green LED indicates the tester is operational and aids in illuminating the workspace.

Non-Contact Voltage Testers

Non-Contact Voltage Testers

All of the Klein Tools' Non-Contact Voltage Testers detect voltage in cables, cords, circuit breakers, lighting fixtures, switches, outlets and wires.

Audible Indicator

Audible Indicator

When voltage is detected, a high intensity, bright red LED illuminates and a warning tone sounds

NCVT-2 Dual Range

NCVT-2 Dual Range

NCVT-2 with Dual Range testing automatically detects and indicates low voltage 12-48V AC) and standard voltage (48-1000V AC) allowing broad application.

NCVT-3R with Flashlight

NCVT-3R with Flashlight

The NCVT-3R Non-Contact Voltage Tester with built in flashlight illuminates your work area. Its visual LED bar graph indicates voltage.

NCVT-4IR with Infrared Thermometer

NCVT-4IR with Infrared Thermometer

The NCVT-4IR Non-Contact Voltage Tester is built for HVAC applications, and includes a 4:1 distance-to-spot ratio IR thermometer with both Fahrenheit and Celsius scales.

NCVT-6 with Laser Distance Meter

NCVT-6 with Laser Distance Meter

The NCVT-6 Non-Contact Voltage Tester incorporates a 66-Foot Laser Distance Meter that measures in meters, and inches and feet with decimals or fractions.

NCVT2KIT

NCVT2KIT

The NCVT2KIT from Klein Tools includes a dual-range, non-contact voltage testser as well as a receptacle tester.

NCVT3KIT

NCVT3KIT

The NCVT3KIT includes a non-contact voltage tester with flashlight and a receptacle tester.

69149 Electrical Test Kit

69149 Electrical Test Kit

Klein Tools updated Electrical Test Kit contains MM300 (Manual-Ranging digital Multimeter), NCVT-1 (Non-Contact Voltage Tster) and the RT105 (Receptacle Tester).

RT210 GFCI Receptacle Tester

RT210 GFCI Receptacle Tester

Klein Tools RT210 GFCI Receptacle Tester detects open ground, reverse polarity, open hot, open neutral, and hot/ground reversed conditions.

RT110 Receptacle Tester

RT110 Receptacle Tester

Klein Tools RT110 Receptacle Tester detects wiring correct, open ground, reverse electrical outlet, open hot, open neutral, and hot/ground reversed conditions.

Klein Quality Testers

Klein Quality Testers

Check out our Test and Measure Collection. Klein Tools makes great products that stand up to the demands of the professionals who use them every day… Since 1861

Klein Tools NCVT-4IR is a voltage tester that provides non-contact determination of AC voltage in cables, cords, circuit breakers, switches, outlets and wires; as well as infrared (IR) thermometer measurements, making it the perfect choice for HVAC professionals.
  • Voltage Tester designed specifically for HVAC applications
  • Non-Contact Voltage Tester provides non-contact determination of AC voltage in cables, cords, circuit breakers, switches, outlets and wires, and AC voltage in security, entertainment, communications, environmental control, and irrigation systems
  • Detects AC voltage from 12 to 1000V with visual and audible indicators
  • 4:1 distance-to-spot ratio IR thermometer with user selectable Degrees Fahrenheit or Degrees Celsius from -22 to 482-Degree Fahrenheit (-30 to 250-Degree Celsius)
  • Convenient laser pointer to target measurement area for temperature measurement
  • Backlit LCD display with 0.1-Degree resolution
  • Auto power-off conserves and extends battery life
  • Screw-thread battery cap with O-ring ensures dust and water resistance
  • Lightweight, compact tool with pocket clip provides easy storage and quick access



  • Shop all Klein Tools voltage testers here
  • Click here for more Klein Tool products
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  • Return Policy
  • California residents

Additional Resources

From the Manufacturer

You will need Adobe® Acrobat® Reader to view PDF documents. Download a free copy from the Adobe Web site.
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Specifications

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Questions & Answers

97Questions
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Q:Can you test electric water heater elements for continuity?
by|Jan 29, 2023
1 Answer
Answer This Question

A:  Yes

by|Jan 30, 2023
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    Q:Can this be used on truck fuses?
    by|Nov 30, 2022
    1 Answer
    Answer This Question

    A:  Klein Tools ET250 is a solid-state, digital voltage and continuity tester. It measures AC/DC voltages up to 600V and tests for continuity. For full tester specs please see the Instructions / Assembly document in the Product Detail section under Additional Resources from the Manufacturer.

    by|Dec 1, 2022
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      Q:Will this tester detect if a breaker has power?
      by|Nov 19, 2022
      2 Answers
      Answer This Question

      A:  Yes

      by|Nov 23, 2022

        A:  Yes, the ET250 can be used on breakers.

        by|Nov 21, 2022
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          Q:Can this test the voltage on a lighting circuit?
          by|Oct 13, 2022
          1 Answer
          Answer This Question

          A:  Yes

          by|Nov 9, 2022
            Showing 1-4 of 97
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            Customer Reviews

            4.4 out of 5
            (331)
            • 4.4
              out of 331 reviews
            • 82%recommend this product
            Filter by:
            Showing 1-10 of 331 reviews
            Durable and accurate temp reading I work in the HVAC industry...
            Durable and accurate temp reading I work in the HVAC industry and It is perfect for getting air temp readings ,.
            by
              Amazing tool
              [This review was collected as part of a promotion.] Amazing , practical and very handy tool, helps a lot if you are in the Electrical and hvac field. And very affordable prices . Klein Tools NCVT-4IR combines two useful functions, a non-contact electrical tester and an IR thermometer. Dust and water Resistant. Bought it a few years ago and have no issues.
              by
                • Recommended
                Voltage tester great product
                [This review was collected as part of a promotion.] This is great tool to have small enough to carry in your pocket another great product by Klein
                by
                  • Recommended
                  I bought this tester for work back in December 2018. I really liked this tester for being able to...
                  I bought this tester for work back in December 2018. I really liked this tester for being able to do 2 things instead of the usual 1. I don't like to have to carry any more tools than I have to on my job. However, it is not as rugged as you would expect Klein tools to be. It fell out of my cargo pants pocket down by my knee and the top of the cap that holds the batteries in broke right off. Of course, the little metal piece that connects to the battery got lost. I would really like to give this tool a better rating, which I will happy to do, if I can get the cap replaced promptly.
                  by
                    5 found this review helpful
                    A well-designed and constructed multi-use test instrument, this tester, although marketed to the ...
                    A well-designed and constructed multi-use test instrument, this tester, although marketed to the HVAC sector, will also be useful for electricians and (with the frequent installation of electrically powered on-demand water heaters) plumbers. The rugged clip provided will secure the tool either in one's pocket or tool pouch and the moisture resistant, O-ring sealed battery compartment will add to its longevity under adverse weather conditions. Electrically, the tool will sense from 12V to 1000V. below 120 volts, the tool will emit a slow beep...above that level, the beep will be more rapid. Frequencies from 50 to 500 Hz can be sensed (which may be a limitation if one works with higher frequency variable Frequency Drive motors operating at higher frequencies). The 4:1 sensing "cone" ratio for the IR thermometer will be adequate for most applications, such as checking for proper flow in condenser or evaporator coils (for the HVAC tech) or overheated contacts and terminations for the electrician. The tool is rated for use down to 32 degrees F (no doubt limited by the LCD display) requiring some care as to storage and use, however the sensing device can measure down to minus 22 degree F (just keep it in your pocket in between readings). Operation is quite intuitive in either temperature or voltage sensing modes. If one prefers to read temperature in degrees C, the display can be easily toggled to do so. The voltage sensing element is well protected by a substantial plastic "nose" to prevent damage. All in all...a very well built tool.
                    by
                    • Recommended
                    5 found this review helpful
                    Received this to test from Klein. Love the versatility of it. However it is large in size. Worth ...
                    Received this to test from Klein. Love the versatility of it. However it is large in size. Worth carrying though.
                    by
                      • Recommended
                      1 found this review helpful
                      A great combination of "no contact" meters in a small package. I've used no contact testers for b...
                      A great combination of "no contact" meters in a small package. I've used no contact testers for both temperature and volt over the years but this is the first time I've run across both no contact volt and temperature tester and having it pocket size really makes this an awesome tester. Meant ideally for the HVAC tech., however the low cost of this combination meter makes it worth having for any Diy-er. The compact size fits in a shirt pocket without feeling too bulky. The tool itself seems to be well constructed to hold up to the rigors of being in a pocket or a tool bag. The sensor end for both temperature and volt is well built. I've experienced tip breaks on other no contact volt meters however Klein did a great job in the design and construction of the NCVT-4IR. The display is only for infrared temperature reading and battery status. The display is backlit for easy reading in low light areas, however, the display does not provide voltage measurement. The tip will change colors from blue (power on) to red (voltage detected). Two buttons on the NCVT-4IR allow operation between temperature measurement and voltage detection. There are also options to turn on/off the laser spot for temperature and change from Fahrenheit to Celsius as well as select on/off audible for voltage detection. Batteries access is easy and takes 2) standard AAA batteries. Both temperature measurement and voltage detection work very well. The distance of the tester to the surface temperature being measured will affect accuracy but this is true for any infrared thermometer. Pros: - 2 great no contact test meters in one small package - easy to operate and use - well constructed, durable - great features without being cluttered with buttons or operation menus - takes standard batteries Cons: - none, I've been using for about a month and I absolutely love this tester
                      by
                      • Recommended
                      4 found this review helpful
                      Handy addition to the at home toolbox for any DIY'er. I do much of my own electrical work around ...
                      Handy addition to the at home toolbox for any DIY'er. I do much of my own electrical work around the house, running new circuits, adding lighting and outlets, both low and high voltage. Normally I would get the multi-meter and touch both leads to the exposed wires to determine if they're live or not. This meter eliminates the guesswork. I know quickly and simply if the wire is live or safe to work with. The thermometer is a nice add-on, but not totally necessary for at home use. However for the price you can't beat the combo. Tester also is a good size and has a nice weight to it, doesn't feel flimsy in hand.
                      by
                      • Recommended
                      2 found this review helpful
                      This was easy to use and well-designed! This Klein non-contact voltage tester with a built-in la...
                      This was easy to use and well-designed! This Klein non-contact voltage tester with a built-in laser infrared thermometer has a lot of useful design features which will make it a go-to tool for testing voltage and temperature. I liked the design of the battery compartment in the body of the tester. Klein wen to the trouble of including a rubber O ring (see picture) to seal the battery compartment (it takes two AAA batteries). In my experience, Klein has always made a high quality tool, and this one certainly is high quality. The plastic case is very solid so this will take the usual wear and tear of being in a tool box or getting dropped frequently! It is very rugged. The laser function is good for testing temperature in hard to reach places, like inside an HVAC unit or heating/cooling pipes just out of reach but still within sight. The voltage testing part of this tool is an audio and visual display (not a digital readout), as explained in the 12 page fold-out instructions that come with the tester (see picture). I found it easy to use – just hold up the end of the tool to the circuit, and a fast red light blink (see picture) is high voltage (120V), and a slow red blink is low voltage (12V). The blue light indicates no voltage present (see picture). I highly recommend this tester because of its excellent design and high quality. It is a must-have tool!
                      by
                      • Recommended
                      6 found this review helpful
                      This is a GREAT! addition to my electricians tool bag. It is small (6" long) and lightweight (3 o...
                      This is a GREAT! addition to my electricians tool bag. It is small (6" long) and lightweight (3 oz). It comes with a sturdy pocket clip which allows you to carry it around in your front pocket. This small non-contact tester easily allows you to detect the presence of AC voltages in wires, sockets and switches. Bright LED lights and an audible alarm indicate if a wire is energized and whether it is less than 120v AC or greater than 120v AC. The detection range for AC is 12v to 1000v. The tester includes a non-contact infrared thermometer. Included is a built in red laser pointer for aiding in pointing the thermometer at the desired location. I measured the temperature of an ice cube and a pan of boiling water and found it measured pretty accurately. See the photo and video.
                      by
                      • Recommended
                      5 found this review helpful
                      Showing 1-10 of 331 reviews

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                      THD SO SKU10022852661002756913
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