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Chauvin Arnoux CA 6418 Oblong Head Earth Clamp

The Chauvin Arnoux CA 6418, a single earth clamp for all types of earth  cables, bars and straps due to the unique design of it's oblong jaw.

Next Day Delivery (subject to availability)

£1,164.00 excluding VAT £1,396.80 including VAT @ 20%
  • 32mm Ø Jaw Size
  • Clamps Over Earth/Bus Bars
  • Measurement Ranges to 1,200 Ω
  • Measurement Ranges to 20A
  • OLED Screen
  • Unique Oblong Jaw
  • Data Hold Function
  • Audible Indication
  • FreeDelivery
  • 30DayMoneyBack
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  • Description
  • Features & Specification
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Chauvin Arnoux CA 6418 with a unique oblong head

A single earth clamp for all types of earth  cables, bars and straps

The CA6418 earth clamp from Chauvin Arnoux, delivered in a carrying case, can be used for quick testing of earth resistance.
With a clamping capacity that allows measurements on 30 x 40mm or 20 x 55mm rectangular bars and cables 32mm in diameter. The CA6418 clamp simultaneously displays the earth resistance and leakage current.
Ergonomically designed, with features such as an OLED display, ensures 180-degree visibility in all lighting conditions. An automatic "pre-Hold" mode when the clamp is opened and automatic compensation of the jaw gap when powering up ensure optimized processing of the measurements provided by the CA6418 clamp.
With a large internal memory- measurements can be stored with a time and date stamp, thanks to the real time clock.

The C.A 6418 Comes Supplied With:

  • 1 carrying case
  • 4 x 1.5 V batteries
  • 1 wrist strap
  • 1 CD-Rom containing the user’s manuals 
  • 1 quick startup guide
  • 1 multi-language safety datasheet
  • 1 verification certificate

Key Features:

  • Loop resistance measurement from 0.01 to 1,200 Ω
  • Current measurement from 0.5 mA to 20 A
  • Alarms available in Ω and A
  • Time/date-stamped storage of 300 measurements
  • Automatic hold of the display when the clamp is opened
  • Automatic calibration of the jaw gap
  • Recalibration possible without returning to factory

CA 6418 conductor dimensions

Additional Features:

  • Current from 0.5 mA to 20 A -Wide  measurement  range from 0.010Ω to   1,200Ω
  • Alarms configurable on Ω and A
  • Automatic Pre‐Hold mode  when the clamp is opened
  • 300 time/date‐stamped measurements
  • Automatic  calibration  of  the  jaw  gap  at startup
  • Buzzer and automatic power‐off
  • Weight: 700 g with rechargeable batteries
  • Dimensions: 225 x 125 x 83 mm

ISSWWW and Chauvin Arnoux

The Chauvin Arnoux Group of companies, incorporating the Metrix and Multimetrix brands are synonymous with design and production of the finest quality products for the electrical testing industry, covering a diverse sector of the market for over 100 years. From their awarded Digiflex current sensors, universal testers, multimeters, network and power analysers, right up to laboratory instrumentation and beyond.
ISSWWW and Chauvin Arnoux have enjoyed a close working partnership for many years and we supply many of their products to trade and industry the world over.


Chauvin Arnoux CA 6418 Clampmeter Technical Specifications
Loop Ohmmeter
Measurement Ranges 0.010 to 0.099 Ω 0.10 to 0.99 Ω 1 to 49.9 Ω 50 to 149 Ω 150 to 245 Ω 250 to 440 Ω 450 to 640 Ω 650 to 1,200 Ω
Resolution 1 mΩ 10 mΩ 100 mΩ 1 Ω 5 Ω 10 Ω 10 Ω 50 Ω
Accuracy ± (1.5 %R* + 0.01 Ω) ± (1.5 %R + 2 r) ± (1.5 %R + 2 r) ± (2.5 %R + 2 r) ± (5 %R + 2 r) ± (10 %R + 2 r) ± (15 %R + 2 r) ± (20 %R + 2 r)
No-load Voltage ≤ 4.5 mV to 2,083 Hz
Measurement Ranges 0.5 to 9.995 mA 10.00 to 99.90 mA  100.0 to 299.0 mA 0.300 to 2.990 A 3.00 to 20.00 A
Resolution 50 µA 100 µA 1 mA 10 mA 100 mA
Accuracy ± (2 %R + 200 µA) ± (2 %R + r) ± (2 %R + r) ± (2 %R + r) ± (2 %R + r)
Alarms Configurable for Z and I
Buzzer Active
HOLD Manual or automatic PRE-Hold
Automatic power-off Active / Inactive
General Specifications
Loop Ohmmeter
Display OLED 152 segments – Active area 48 x 39 mm
Storage 300 time/date-stamped measurements
Power SUpply 4 x 1.5 V LR6 AA alkaline batteries or 4 NiMH batteries
Battery Life 2,400 x 30 s measurements
Calibration Automatic at start-up
IEC61010 100 V CAT IV , 150 V CAT III
Ingress Protection IP 40
Dimensions 300 x 106 x 56 mm
Weight 1.2 kg approx. including batteries

Standard FREE 3-5 Day Courier Delivery – UK Mainland only - Zones A & B
Included in the price for all orders over £40.00 (exc vat). Sent using express courier, delivered within 3-5 working days from the date of your order, subject to availability.

Standard 1-2 Day Express Courier Delivery – UK Mainland only - Zones A & B
£4.50 for all all orders under £40.00 (exc vat). Sent by express courier, delivered within 1-2 working days from the date of your order, subject to availability.

Express Courier 1-2 Day Delivery – UK Mainland only - Zones A & B
£4.50 select at the checkout. Sent using express courier.

Next Day Delivery – UK Mainland only - Zones A & B
£8.00 select at the checkout. Sent using express courier, orders must be placed before 3pm for next day delivery, subject to availability.

Saturday Pre 12am - UK Mainland only - Zones A & B
£15.00 select at the checkout. Sent using express courier, orders must be placed before 3pm for Saturday delivery.

Orders must be placed before 3pm for next day delivery and a telephone number supplied, subject to availability.
Please note that predicted delivery times are based on regular trading days Monday to Friday. Public holidays, bank holidays and weekends are outside the usual scope of our dispatch and therefore may incure additional days lead time to your order.

Orders requiring calibration. Whilst we take the greatest care to get all orders dispatched and delivered to you in the stated time frame, orders received late afternoon and requiring calibration may on occasion miss dispatch that day, according to the complexity of the calibration. Be assured they will ship on the next dispatch, this in most cases should not add more than 24 hours to you delivery.

Delivery Surcharges
Because of the high cost of carriage we need to apply a surcharge on all deliveries made in the following regions bringing the carriage charges to:

  • Zones A & B  - Mainland delivery rates apply. 
  • Zone C - Scottish Highlands. 
  • Zone D - Outer Hebrides, Orkney Isles, Shetland Isles, Isle of Man, Scilly Isles, and Channel Islands.
  • Zone E - Northern Ireland
  • Zone F - Republic of Ireland

New Postage Map Sept 2018> 

International delivery

International delivery charges are automatically added to your order at the checkout; you can also use the guide below for a guide on prices. For any questions regarding international deliveries please contact us at

If no shipping option is available to your selected country please call us on +44 (0) 1603 406 148 to purchase your items.