- Details
- Category: Clamp Meters

The EX655 is a 600 amp True RMS AC/DC clamp meter. This clamp meter also monitors AC/DC voltage, resistance, capacitance, frequency, temperature, continuity/diode tests, and includes an NCV detector. The EX655 meter has a 1.18" jaw size and can accommodate conductors up to 350 MCM. It also has a 6000 count backlit LCD display, data hold, min/max, relative function, low pass filter, inrush mode, DC zero function, LCD trending bargraph, auto power off, and a convenient LED worklight. It comes with test leads, a general-purpose bead wire temperature probe, and three AAA batteries.
AC Current | 60A, 600A |
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AC Current Basic Accuracy | ±2.5% of reading |
AC Current Max Resolution | 0.01A |
AC Microcurrent | 600µA |
AC Microcurrent Max Resolution | 0.1µA |
AC Voltage | 750V |
AC Voltage Basic Accuracy | ±1.2% of reading |
AC Voltage Max Resolution | 1mV |
Capacitance | 60mF |
Capacitance Max Resolution | 0.01nF |
Continuity | Yes |
DC Current | 60A ,600A |
DC Current Basic Accuracy | ±2.5% of reading |
DC Current Max Resolution | 0.01A |
DC Microcurrent | 600µA |
DC Microcurrent Max Resolution | 0.1µA |
DC Voltage | 1000V |
DC Voltage Basic Accuracy | ±0.8% of reading |
DC Voltage Max Resolution | 0.1mV |
Diode Test | Yes |
Frequency | 10Hz to 1MHz |
Frequency Max Resolution | 0.01Hz |
Jaw Size | 1.18" (30mm), conductors up to 350MCM |
Non-Contact Voltage (NCV) Detector | 100 to 1000VAC |
Resistance | 60MΩ |
Resistance Max Resolution | 0.1Ω |
Temperature (Type K) Max Resolution | -40 to 1832°F (-40 to 1000°C) |
Temperature (Type N) Basic Accuracy | 1°F/°C |
True RMS | Yes |
Certifications | CE, UL |
Dimensions | 9 × 3 × 1.6" (228 × 77 × 41mm) |
Power | 3 × AAA (1.5V) batteries |
Safety Category | CATIII - 600V, CATII - 1000V |
Warranty | 3 years |
Weight | 9.4oz (265g) |
- Details
- Category: Clamp Meters

The EX623A True RMS AC/DC clamp meter features two thermocouple inputs for measuring T1, T2, and T1-T2 differential temperature. It includes an infrared thermometer, a laser pointer for locating hot areas, and a Non-Contact Voltage (NCV) detector for safely testing for live electrical current. It has a DC micro-amp function that is perfect for measuring flame rods in HVAC systems, as well as capacitance measurement capabilities of up to 40 mF. The EX623A comes with test leads, a 9-volt battery, a Type K thermocouple, a bead wire temperature probe, and a carrying box.
AC Current | 0.01 A to 600 A |
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AC Current Basic Accuracy | ±(1.5% + 5d) |
AC Voltage | 0.1 mV to 600 V |
Capacitance | 0.001 nF to 40 mF |
DC Current | 0.01 A to 600 A |
DC Microcurrent | 0.1 µA to 600 µA |
DC Voltage | 0.1 mV to 600 V |
Duty Cycle | 0.5% to 99.0% |
Frequency | 0.001 Hz to 100 kHz / Frequency (Clamp) 0.1 Hz to 400 Hz |
Jaw Size | 32 mm (1.25 in) |
Non-Contact Voltage (NCV) Detector | Yes |
Resistance | 0.1 Ω to 60 M Ω |
Temperature (IR) Max Resolution | -50°C to 270°C (-58°F to 518°F) |
Temperature (Type K) Max Resolution | -50°C to 1000°C (-58°F to 1832°F) |
Dimensions | 241 mm × 96 mm × 45 mm (9.4 in × 3.7 in × 1.74 in) |
Display | 6000 counts |
Safety Category | CAT III-600 V |
Warranty | 2 years |
Weight | 315 g (11.11 oz) |
- Details
- Category: Clamp Meters

The small Extech 380950 is a mini AC/DC clamp meter. The 380950 has an extra-small diameter jaw that can reach into very small spaces while maintaining a 1 mA resolution and very low-current sensitivity. This amp clamp is used for critical troubleshooting duties in plant maintenance, electrical, HVAC, and telecom work, as well as residential, automotive, fleet maintenance, marine, and motorcycle electrical repair. Complete with test leads, two 1.5V AAA batteries, and a carrying box.
AC Current | 4A, 80A |
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AC Current Basic Accuracy | ±(2.5% of reading + 5 digits) |
AC Current Max Resolution | 1mA |
AC Voltage | 400mV to 600V |
AC Voltage Basic Accuracy | ±(2.0% of reading + 4 digits) |
AC Voltage Max Resolution | 0.1mV |
Continuity | Yes |
DC Current | 4A, 80A |
DC Current Basic Accuracy | ±(2.5% of reading + 4 digits) |
DC Current Max Resolution | 1mA |
DC Voltage | 400mV to 600V |
DC Voltage Basic Accuracy | ±(1.5% of reading + 3 digits) |
DC Voltage Max Resolution | 0.1mV |
Diode Test | Yes |
Duty Cycle | 5 to 99.9% |
Duty Cycle Basic Accuracy | ±(1.2% of reading + 3 digits) |
Duty Cycle Max Resolution | 0.1% |
Frequency | 5Hz to 10MHz |
Frequency Basic Accuracy | ±(1.2% of reading + 3 digits) |
Frequency Max Resolution | 0.001Hz |
Jaw Size | 0.5" (12mm), conductors up to 3/0 AWG |
Resistance | 400Ω to 40MΩ |
Resistance Max Resolution | 0.1Ω |
Certifications | CE, UL |
Dimensions | 8.2 × 2.7 × 1.4" (210 × 70 × 37mm) |
Display | 4000-count segment LCD |
Safety Category | CAT III-300V |
Warranty | 2 years |
Weight | 7oz (200g) |
- Details
- Category: Clamp Meters

The Extech 380947 is a 400-amp True RMS tiny clamp meter. This meter has a tiny diameter jaw that can reach into confined spaces while delivering 1mA resolution and very low-current sensitivity. This tiny clamp meter can be used to troubleshoot current and frequency issues in plant maintenance, electrical, HVAC, and telecom work, as well as residential electrical, fleet maintenance, marine, and motorcycle repair. Includes battery and instructions.
AC Current | 4A, 40A, 100A, 400A |
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AC Current Basic Accuracy | ±1.5% |
AC Current Max Resolution | 0.001A |
DC Current | 40A, 400A |
DC Current Basic Accuracy | ±1.0% |
DC Current Max Resolution | 0.01A |
Frequency | 10kHz |
Frequency Basic Accuracy | ±(0.5% of reading + 2 digits) |
Frequency Max Resolution | 0.01Hz |
Jaw Size | 0.9" (23mm), conductors up to 4/0 AWG |
True RMS | Yes |
Certifications | CE, UL |
Dimensions | 7 × 1.8 × 1.3" (178 × 45 × 32mm) |
Display | 4000-count segment LCD |
Safety Category | CAT III-300V |
Warranty | 2 years |
Weight | 8oz (225g) |