​FLIR Systems, Inc. designs, develops, manufactures, markets, and distributes technologies that enhance perception and awareness. 

FLIR bring innovative sensing solutions into daily life through their thermal imaging systems, visible-light imaging systems, locator systems, measurement and diagnostic systems, and advanced threat detection systems. 

Today FLIR advanced systems and components are used for a wide variety of thermal imaging, situational awareness, and security applications, including airborne and ground-based surveillance, condition monitoring, navigation, recreation, research and development, manufacturing process control, search and rescue, drug interdiction, transportation safety and efficiency, border and maritime patrol, environmental monitoring, and chemical, biological, radiological, nuclear, and explosives threat detection.

About FLIR

CM4X Series

The FLIR CM4X Clamp Meter Family includes three professional and affordable True RMS meters designed for commercial and residential electricians.

The CM42 and CM44 feature AC clamp measurement, and the CM46 offers both AC/DC measurement to meet your unique needs. Each meter is equipped with a bright backlit display for ease of use inside electrical panels. Accu-TipTM technology delivers amperage measurements on smaller-gauged wires more accurately – to a tenth of a digit.

All models offer MAX/MIN/AVG recording, frequency measurement, and electrical field detection to help you determine voltage presence and relative strength of the field.

Made with an over-molded, easy-to-grip design, the CM4X clamp meter family is durable enough to withstand a two-meter drop, and the slim form factor is convenient to carry in your toolbag anywhere you go.

Precise, accurate measurements
High accuracy and resolution in small panels

  • Accu-Tip enables more accurate amperage measurements on smaller- gauged wires
  • MAX/MIN/AVG recording, and frequency and diode measurement
  • Data hold, zero function, and low pass filter (VFD) for voltage measurement

Engineering you can have confidence in
Built rugged to last you for years to come

  • Durable to withstand a 2-meter drop, and operates at -10 to 50°C (14 to 122°F)
  • Large, bright backlit display makes readings easy to see
  • Tough, over-molded, easy-to-grip design and slim, portable size

Professional performance at an affordable price
Provides all the critical features you need

  • Built to accept up to a 30mm max conductor
  • Electrical field detection (NCV) determines if voltage is present and the relative strength of the field for safety
  • True RMS professional clamp meters



Measurements CM42 CM44 CM46 Basic Accuracy
DC Voltage 600 V 600 V 600 V ±1.0%
AC Voltage (Digital Low Pass Filter/VFD) 600 V 600 V 600 V ±1.0%
AC + DC Voltage (Digital Low Pass Filter/VFD) 600 V ±1.2%
Clamp-On AC Current (50-100 Hz) (100-400 Hz) 400 A 400 A 400 A ±1.8% ±2.0%
Accu-Tip Clamp-On AC Current 60A 60A 60A ±1.5%
Clamp-On DC Current 400 A ±2.0%
Accu-Tip Clamp-On DC Current 60A ±2.0%
Frequency 50-400 Hz 50-400 Hz 50-400 Hz ±1.0%
Resistance 60 kΩ 60 kΩ 60 kΩ ±1.0%
Capacitance 2500 μF 2500 μF ±2.0%
Diode 2.0 V 2.0 V 2.0 V ±1.5%
DCμA 2000 μA 2000 μA ±1.0%
Temperature -40°C to 400°C (-40°F to 752°F) -40°C to 400°C (-40°F to 752°F) ±1.0%
General Meter      
Display 3-5/6 digits 6000 counts
Operating Temperature -10°C to 50°C (14 to 122°F)
Continuity 10Ω< & < 250Ω
Recording Min/Max/Avg
Backlight LCD Yes
Drop Test 2m
Certifications UL,CE
Category CAT IV 300V / CAT III 600V
Jaw Opening 30 mm Max
Warranty Limited Lifetime
Battery Type 2xAAA
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