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EXTECH CA3018 3000A Cat IV AC Flex Clamp-on Adaptor


The Extech CA3018 Flexible with its 45cm (18″) clamp jaw easily wraps around bus bars and cable bundles that may be difficult to access with regular clamp meters. The thin 7.5mm cable diameter easily fits into tight spaces.

Authorised Australian Distributor

CE   UL   CAT III   CAT IV   1 Year

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SKU: EXTECH CA3018 Category: Tags: ,

Expand your meter’s capabilities with the Extech CA3018 Flex Clamp-on and measure AC Current up to 3000A. Fits most MultiMeters or Clamp Meters with standard shrouded banana plug sockets. Flexible clamp jaw easily wraps around bus bars and cable bundles where standard clamp adaptors and meters can’t. The thin 7.5mm cable diameter easily fits into tight spaces.


  • Measure AC Current up to 3000A
  • Flexible  45.7cm (18″)clamp jaw easily wraps around bus bars and cable bundles
  • 7.5mm cable diameter fits into tight spaces and around large conductors
  • Measures AC Current in three ranges
  • Easy twist clamp cable closure to Lock or Open
  • Compatible with most multimeters and clamp meters with standard sized banana plug inputs
  • Complete with built-in flex clamp cable, 2m (6.6ft) lead with banana plugs, and two AAA batteries
AC Current Ranges 30.00A (100mV per Amp output); 300.0A (10mV per Amp output); 3000A (1mV per Amp output)
Max Resolution 0.01A
Basic Accuracy ±3%FS (45 to 500Hz)
Flex Cable Diameter 0.3″ (7.5mm)
Flex Cable Tip Diameter 0.51″ (13mm)
Dimensions 13.8 x 5.1 x 1″ (350 x 130 x 25mm)
Weight 7.1oz (200g)
Clamp Jaw Flexible type with locking mechanism and 7.5mm (0.3”) coil diameter
Battery status indication LED indicator blinks slowly (battery power > 2.5V) or quickly (battery power < 2.5V)
AC bandwidth 45 to 500Hz (sine wave)
Operating Temperature and Humidity 0~30°C (32~86°F); 80%RH maximum
30~40°C (86~104°F); 75%RH maximum
40~50°C (104~122°F); 45%RH maximum
Storage Temperature and Humidity ‐20°~60°C (‐4°~140°F); 80%RH maximum
Temperature Coefficient 0.2 x specified accuracy / °C, < 18°C (64.5°F), > 28°C (82.4°F)
Altitude Maximum operating altitude 2000m (6562’)
Battery Two “AAA” 1.5V batteries
Battery life 160 hours with alkaline batteries
Safety Standards For indoor use and in accordance with the requirements for double insulation to EN61010‐1, EN61010‐2‐032, EN61326‐1; CAT IV 600V, CAT III 1000V, Pollution Degree 2
Shock Vibration Sinusoidal vibration MIL‐PRF‐28800F (5‐55 Hz, 3g max.)
Drop Protection 1.2m (4’) drop onto hard wood or concrete floor
Function Range Output Voltage Accuracy
AC Current 30.00 A AC 100mV/1A AC ± (3.0% of Full Scale)
for frequency range: 45~500Hz
300.0A AC 10mV/1A AC
3000 A AC 1mV/1A AC

Notes: Accuracy is given as ± (% of reading + least significant counts) at 23°C ±5°C with relative humidity lower than 80%.
Accuracy is specified for a period of one year after calibration.
Max. Output Voltage: 4.5V peak
Output Noise: < 5mV for each range


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