Martindale CM51 300A AC Mini Clamp Meter

Product no.: CM51
Old price £69.00
from £41.40
Price plus VAT, plus delivery

  • Autoranging 40.00A & 300.0A AC
  • 27mm jaw diameter
  • 110g, 150 x 52 x 24mm
  • Fits in a shirt pocket
  • Display hold
  • Auto power off & low battery indicator

    The CM51 is a high accuracy, current only mini AC clamp meter. This compact clamp is small enough to fit in a shirt pocket and with resolution down to 10mA is ideal for residential and commercial applications.
    This low cost auto ranging clamp meter has a jaw diameter of 27mm and is useful tool for electricians, maintenance teams and installers.
    The clamp has a useful Data-hold feature to freeze the displayed value when used in difficult to access locations where the display may be difficult to read.
    There is also an auto power off function and the clamp is supplied with a manual, battery and a soft carry case.


Display 3¾ digit LCD display with annunciators
AC A 40.00A/300.0A (40Hz to 500Hz)
Accuracy ± 1.8% rdg ± 5 dgt, 50-60Hz
Max conductor 27mmØ
Operating temperature & humidity 0°C to 40°C, less than 80% RH.
Weight 110g
Dimensions 150 x 52 x 24mm
Includes case, battery and manual



  CM51 CM55 CM57
AC Current ✔ ✔ ✔
DC Current      
AC/DC Volts   ✔ ✔
Ohms   ✔ ✔
Frequency     ✔
Capacitance     ✔
Non-contact Voltage Detector     ✔
Auto ranging ✔ ✔ ✔
Max Conductor Size 27mm Ø 25mm Ø
25mm Ø
True RMS     ✔
Min Max      
Backlight     ✔
Auto Power Off ✔ ✔ ✔
Safety CAT III 300V CAT III 600V CAT III 600V
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