Web only

Martindale CM51 Digital Clamp Meter

Code: A06WR

  • Check AC current in your cables
  • Measure AC current up to 300A
  • Digital LCD display

Product details

Martindale CM51 Digital Clamp Meter

• Check AC current in your cables
• Measure AC current up to 300A
• Digital LCD display
• Keep a value displayed with a data hold button
• Compatible with cables up to 27mm in diameter
• Powered from a CR2032 battery

What can this clamp meter do?
Check the AC current in your cables without having to mess about dismantling your system. The clamp meter can measure the AC current in cables up to 27mm in diameter without you needing to disconnect the cables. Measure up to 300A with a sample rate of two and a half times per second. It’s easy to read the value on the digital LCD display, and you can keep a value from a specific time by pressing the data hold button. The clamp meter is safety rated to EN 61010-1, EN 61010-2-032 Overvoltage Cat. III 300V, Class II.

How is the clamp meter powered?
Power the clamp meter with a single 3V CR2032. The ‘auto power off’ feature switches the clamp meter off after 12 minutes without input, which lengthens your battery life. The clamp meter comes with a built-in battery indicator to let you know when to change the battery. For added safety, the clamp meter has a finger guard to protect you.

Type Digital Clampmeter
Basic Functions
DC Voltage n/a
AC Voltage n/a
DC Current n/a
AC Current 40.00A / 300.0A, 40Hz to 500Hz
Resistance n/a
Capacitance n/a
Frequency n/a
Frequency Response n/a
Duty Cycle n/a
Special Functions
Audible Continuity n/a
Diode No
Data Hold Yes
Display Backlight Yes
Sleep Mode n/a
Max Display n/a
Battery Type 1 x 3V CR2032 battery
Product Dimensions 150 x 52 x 24 mm
Product Weight 110g
Max grip size (clamps) 27mm
Probes included n/a

Bulk Prices

Item code Item name Quantity Price
A06WR Martindale CM51 Digital Clamp Meter (1+) £79.99

Why not tell us and our B2B sales team about your specific business needs and expectations?

At Maplin, we’re always looking for innovations and technology that can help your business work more efficiently.

With a dedicated business team and special services available only to business customers, you can access our electronics and technology solutions through our wide network of over 200 stores, our website with more than 20,000 products or though your personal account manager over the phone.

Working with organisations for nearly 30 years, Maplin offers a nationwide range of benefits to our business users:

  • 30 day EOM credit account
  • volume discount pricing
  • online and in-store use of account
  • one-to-one account management
  • bespoke product sourcing and branding
  • free delivery on orders over £10
  • scheduled and forward ordering service

Contact our business team on 

0333 400 9740 to open an account or discuss your business needs.

To receive your free copy of the Maplin Catalogue just call 0333 400 9740.


  • Home Delivery
  • Click & Collect