McMaster-Carr logo
    Filter by
    Battery Size
    Batteries Included
    Export Control Classification Number (ECCN)
    DFARS Specialty Metals
    Batteries Required
    Batteries Replaceable
    Number of Leads
    For Cable Type
    Manufacturer Model Number
    Number of Test Connections
    Forward
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Print
    How can we improve?
    Comments
    E-mail address (if you would like a response)
    37 Products

    Line Break Detectors

    Image of Product. Front orientation. Line Break Detectors. Long-Reach-Tip Sensor End, Sheathed-Alligator-Clip Sensor End.
    Image of Product. Front orientation. Line Break Detectors. Sheathed-Alligator-Clip Sensor End, Probe-Tip Sensor End.
    Image of Product. Front orientation. Exploded view. Line Break Detectors. Test-Lead Sensor End with Replaceable Alligator Clips.

    Long-Reach-Tip Sensor End,

    Sheathed-Alligator-Clip

    Sensor End

    Probe-Tip Sensor End,

    Sheathed-Alligator-Clip

    Sensor End

    Test-Lead Sensor End with

    Replaceable Alligator

    Clips

    Check continuity in circuits. If there are no line breaks, light or sound alerts signal continuity.
    Line Break Detectors
    Replacement
    Test Leads
    Test
    Leads
    Batteries
    Sensor End
    Measures
    Alert
    Type
    No.
    of
    Lg.
    Included
    Size
    No.
    Required
    Each
    Pair
    Long-Reach Tip, Sheathed Alligator ClipContinuity, Ground FaultsLight172"YesCR210000000000000———0
    Probe Tip, Sheathed Alligator ClipContinuityLight136"YesAAA200000000000———0
    Test Leads with Replaceable Alligator ClipsContinuitySound248"No9V100000000000000000000000000

    Voltage Detectors

    Confirm that voltage is present in receptacles, cables, and other electrical components. The detectors have light or sound alerts to indicate voltage.
    Voltage Detectors
    Image of Product. Front orientation. Voltage Detectors. Long-Reach-Tip Sensor End, 6V DC to 50V DC.
    Image of Product. Front orientation. Voltage Detectors. Long-Reach-Tip Sensor End, 12V AC to 250V AC.
    Image of Product. Front orientation. Voltage Detectors. Test-Lead Sensor End with Sheathed Alligator Clips.

    Long-Reach-Tip Sensor End

    6V DC to 50V DC

    Long-Reach-Tip Sensor End

    12V AC to 250V AC

    Test-Lead Sensor

    End with Sheathed

    Alligator Clips

    Image of Product. Front orientation. Voltage Detectors. Test-Lead Sensor End with Needle Tips.
    Image of Product. Front orientation. Voltage Detectors. Noncontact Sensor End, 12V AC to 1,000V AC.
    Image of Product. Front orientation. Voltage Detectors. Noncontact Sensor End, 50V AC to 1,000V AC.

    Test-Lead Sensor End

    with Needle Tips

    Noncontact Sensor End

    12V AC to 1,000V AC

    Noncontact Sensor End

    50V AC to 1,000V AC

    Long-Reach-Tip Sensor End, Test-Lead Sensor End with Sheathed Alligator Clips, and Test-Lead Sensor End with Needle Tips—Long-reach tips, tests leads with sheathed alligator clips, and test leads with needle tips must touch the electrical component you're testing to sense voltage.
    Noncontact Sensor End—Noncontact detectors can sense voltage when brought near the electrical component.
    Batteries
    Sensor End
    Electrical Safety
    Rating
    DC Voltage,
    V DC
    AC Voltage,
    V AC
    Measures
    Alert Type
    Certification
    Req.
    Included
    Each
    Long-Reach Tip—6 to 50—DC VoltageLight, SoundUL Listed, C-UL ListedNo—00000000000000
    Long-Reach TipCAT III, 250V12 to 25012 to 250AC Voltage, Continuity, DC VoltageLightETL Listed, C-ETL ListedYesYes000000000000
    Test Leads with Sheathed Alligator ClipsCAT I, 50V5 to 505 to 50AC Voltage, DC VoltageLightETL Listed, C-ETL ListedNo—00000000000
    Test Leads with Needle TipsCAT III, 600V160 to 600120 to 480AC Voltage, DC VoltageLightCSA Certified
    		No—000000000000
    NoncontactCAT IV, 600V—12 to 1,000AC VoltageLight, SoundETL Listed, C-ETL ListedYesYes0000000000000
    NoncontactCAT IV, 1,000V—50 to 1,000AC VoltageLight, SoundUL Listed, C-UL ListedYesYes0000000000000
    Fluke Voltage Detectors
    Image of Product. Front orientation. Voltage Detectors. Fluke Voltage Detectors, Long-Reach-Tip Sensor End.

    Long-Reach-Tip Sensor End

    Long-Reach-Tip Sensor End—Long-reach tips, tests leads with sheathed alligator clips, and test leads with needle tips must touch the electrical component you're testing to sense voltage.
    Batteries
    Sensor End
    Mfr. Model
    No.
    Electrical Safety
    Rating
    AC Voltage,
    V AC
    Measures
    Alert Type
    Certification
    Req.
    Included
    Each
    Long-Reach Tip1AC-IICAT IV, 1,000V90 to 1,000AC VoltageLight, SoundCSA Certified, CSA-US CertifiedYesYes0000000000000
    Long-Reach Tip1LAC-IICAT IV, 1,000V20 to 90AC VoltageLight, SoundCSA Certified, CSA-US CertifiedYesYes000000000000

    High-Voltage Detectors

    Image of Product. Front orientation. Voltage Detectors. High-Voltage Detectors.
    Safely check for the presence of voltage in high-voltage equipment and lines. This noncontact detector checks for voltage by sensing electrostatic fields when brought near the electrical component. Light and sound alerts indicate voltage.
    Hot Stick (48" Long)—For testing 1,500-122,000V AC, a hot stick is required (not included). It attaches to the high-voltage detector to extend your reach and detect voltage from a distance.
    Batteries
    Sensor
    End
    AC Voltage,
    V AC
    Measures
    Alert Type
    Includes
    Req.
    Included
    Each
    Noncontact30 to 122,000AC VoltageLight, SoundCarrying CaseYesYes00000000000000

    Voltage Detectors for Hard Hats

    Image of ProductInUse. Shown with Hard Hat (Sold Separately). Bottom orientation. Voltage Detectors. Voltage Detectors for Hard Hats.

    Shown with Hard Hat

    (Sold Separately)

    Image of Product. Bottom orientation. Voltage Detectors. Voltage Detectors for Hard Hats.
    Clip these detectors to your hard hat to identify voltage and current from 360°. Without making physical contact, they flash light in the direction of the electrical threat and beep louder as you get closer to it. These lightweight detectors are comfortable to wear all day. They’re often used to identify live conductors, energized lines underground, and residual voltage.
    Set the sensitivity level to determine when the detector alerts you. While the battery life varies depending on the number of alerts, a full charge can last up to five days. Recharge the battery with the included USB charging cable or a standard USB 2.0 Micro-B charger.
    120V AC to 500 kV AC—120V AC-500kV AC detectors sense voltages as low as those in a power socket and as high as those in high-power transmission lines. Since they detect a wide range of voltages, they’re a helpful tool for rescue workers, electricians, and telecom workers. They can also connect to an app to notify emergency response services when there is a fall, injury, or no movement detected. The app is optional, and it requires a paid subscription. This safety feature makes these detectors a great option for those working alone.
    2.4 kV AC to 500 kV AC—2.4kV AC to 500kV AC detectors identify a wide range of voltages found in high-power transmission lines, so they’re often used by linemen. However, they won’t detect the low voltage ranges found in telecom lines or small machinery.
    Voltage Detectors
    Replacement
    Hard Hat Clips
    Batteries
    AC Voltage,
    kV AC
    No. of Sensitivity
    Levels
    AC Current,
    amp
    Measures
    Life,
    hr.
    Included
    Includes
    Alert Type
    Flammability
    Rating
    Wt.,
    oz.
    Enclosure
    Rating
    Features
    Each
    Each
    120 to 500111 to 200AC Current, AC Voltage40YesCarrying Case, USB Charging CableLight, SoundUL 94 V-0
    		0.95IP67
    		App Connectivity00000000000000000000000000
    2.4 to 50071 to 200AC Current, AC Voltage80YesCarrying Case, USB Charging CableLight, SoundUL 94 V-0
    		0.5IP67
    		—0000000000000———0

    Data Cable Testing Adapters

    Image of Product. Front orientation. Data Cable Testing Adapters.
    Attach the included cord to an RJ45 wall outlet to isolate the signals of a data line, and use alligator clips to connect your testing device.
    No. of Test
    Connections
    Includes
    Each
    8Cord with RJ45 Plugs000000000000

    Fluke Vibrating Voltage Meters

    Image of Product. Front orientation. Voltage Meters. Fluke Vibrating Voltage Meters.
    Detect voltage with three types of alerts for extra safety—light, sound, and vibration. There are LEDs that light up to show the approximate voltage level, and a digital LCD shows precise voltage measurements. Fluke meters are known for quality and durability.
    Batteries
    Mfr. Model
    No.
    Electrical Safety
    Rating
    Measures
    Voltage Increments
    Max.
    Resistance
    Alert Type
    Display Type
    Display
    Features
    Includes
    Lead
    Lg.
    Certification
    Req.
    Included
    Each
    T+ProCAT IV, 600VAC Voltage, Continuity, DC Voltage, Resistance12V, 24V, 48V, 120V, 208V, 240V, 277V, 480V, 600V10 kΩLight, Sound, VibrationDigital, Light IndicatorBacklightTest Leads34"UL Listed, C-UL ListedYesYes00000000000000

    Vibrating Voltage Meters

    Image of Product. Front orientation. Voltage Meters. Vibrating Voltage Meters.
    In addition to vibrating to confirm the presence of voltage, these meters have LEDs that light up to show an approximate voltage level.
    AC
    Voltage, V AC
    DC
    Voltage, V DC
    Batteries
    Electrical Safety
    Rating
    Measures
    Min.
    Max.
    Min.
    Max.
    Alert Type
    Display Type
    Includes
    Lead
    Lg.
    Certification
    Req.
    Included
    Each
    CAT III, 600VAC Voltage, DC Voltage100600100600Light, VibrationLight IndicatorTest Leads28"UL Listed, C-UL ListedNo—0000000000000
    CAT III, 600VAC Voltage, Continuity, DC Voltage56005600Light, VibrationLight IndicatorTest Leads28"UL Listed, C-UL ListedYesYes000000000000

    Fluke Wireless Remote-Reading Voltage Meters

    Image of Product. Front orientation. Voltage Meters. Fluke Wireless Remote-Reading Voltage Meters.
    Measure voltage from a distance with these wireless connection-enabled meters that transmit readings to a separate display. Fluke is known for quality and durability.
    The meters work with the Fluke 3000 FC multimeter, a computer with a Fluke pc3000 FC connector plugged in (not included), or a mobile device that has the Fluke Connect app.
    True RMS AC Calculation—The true RMS meter takes accurate AC measurements regardless of the load type or sine wave shape. This is important for testing electronic devices that draw current in short pulses that can distort the shape of the wave, such as computers and adjustable-speed drives.
    Display Count—Display count is an industry designation and not an actual value. These 1,000-count meters show numbers up to 999.
    Batteries
    Mfr. Model
    No.
    AC
    Calculation
    Electrical Safety
    Rating
    Measures
    Max. AC Voltage,
    V AC
    Max. DC Voltage,
    V DC
    Display
    Type
    Display
    Features
    Data Log
    Cap.
    Display
    Count
    Includes
    Certification
    Req.
    Included
    Each
    v3000 FCTrue RMSCAT IV, 600VAC Voltage1,000—DigitalBacklight65,0001,000Alligator Clips, Magnetic Hanger, Test LeadsCSA Certified, CSA-US CertifiedYesYes000000000000000
    v3001 FC—CAT IV, 600VDC Voltage—1,000DigitalBacklight65,0001,000Alligator Clips, Magnetic Hanger, Test LeadsCSA Certified, CSA-US CertifiedYesYes00000000000000

    Line Testers

    Image of Product. Front orientation. Line Testers.
    Diagnose problems with analog and digital telephone lines.
    Display
    Measures
    Alert
    Type
    Type
    Features
    Includes
    Batteries
    Included
    No. of Batteries
    Req.
    Battery
    Size
    Each
    DC Current, DC Voltage, Dial ToneLightDigitalCall Waiting, Caller ID, Number DialedHeadset, Test Leads with Alligator Clips and RJ11 PlugNo2AA000000000000000

    Tone-Generating Line Testers

    Image of Product. Front orientation. Line Testers. Tone-Generating Line Testers, RJ11 Plug.
    Image of Product. Front orientation. Line Testers. Tone-Generating Line Testers, RJ45 Plug.

    RJ11 Plug

    RJ45 Plug

    Generate an audible signal when testing for short circuits, line continuity, or when locating a cable. Use an amplifier (sold separately) to hear the signal. These tone generators have a light signal to verify polarity.
    Line Testers
    Line Tester
    Pouches
    Measures
    Alert Type
    Features
    Includes
    Batteries
    Included
    No. of Batteries
    Req.
    Battery
    Size
    Each
    Each
    Cable Location, Continuity, PolarityLight, SoundRJ11 PlugTest Leads with Alligator ClipsNo19V000000000000000000000000000
    Cable Location, Continuity, PolarityLight, SoundRJ45 PlugTest Leads with Alligator ClipsNo19V00000000000000000000000000

    Line Tester Adapters

    Image of Product. Front orientation. Line Tester Adapters.
    Attach the included cord to an RJ11 wall outlet to isolate the signals of a telephone line, and use alligator clips to connect your testing device.
    No. of Test
    Connections
    Includes
    Each
    6Cord with RJ11 Plugs000000000000

    Noise-Filtering Line Testing Amplifiers

    Image of Product. Front orientation. Line Testing Amplifiers. Noise-Filtering Line Testing Amplifiers.
    Block out power-line hum when identifying a cable. Use this amplifier with a tone generator or tester to identify a cable without making direct contact with the wire. The tone will get louder the closer you get to the correct cable.
    Line Testing Amplifiers
    Line Tester
    Pouches
    Measures
    Alert
    Type
    Features
    Each
    Each
    Cable LocationSoundNoise Filter, Socket for Telephone Line Tester0000000000000000000000000000

    Line Testing Amplifiers

    Image of Product. Front orientation. Line Testing Amplifiers.
    Use this amplifier with a tone generator or tester to identify a cable without making direct contact with the wire. The tone will get louder the closer you get to the correct cable.
    Line Testing Amplifiers
    Line Tester
    Pouches
    Measures
    Alert
    Type
    Features
    Each
    Each
    Cable LocationSoundSocket for Telephone Line Tester000000000000000000000000000
    back to top