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Cea Convex & Convex Pulse Multi Process Welder – 400v

  • Achieve professional-quality welds on various materials
  • Simplify operation with user-friendly controls
  • Minimise rework thanks to reduced splatter and distortion (Convex Pulse model)
  • Tackle diverse welding projects with a single machine
  • Enjoy easy manoeuvrability for on-site jobs
  • Invest in a reliable and long-lasting welding solution


Worldwide Delivery
Rated excellent on Google
Over 50 years welding expertise
Free delivery over £85 inc. VAT
Convex 321
Convex 325 Pulse
Convex 401
Convex 405 Pulse

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Take your welding projects to the next level with the Cea Convex & Convex Pulse Multi Process Welder. This versatile machine is perfect for both experienced welders and enthusiastic DIYers, offering superior performance in MIG/MAG, MMA (stick), and TIG (lift arc) welding processes.

The Cea Convex boasts a user-friendly synergic control panel, simplifying operation. Simply select your material type, wire diameter, and desired gas, and the welder automatically sets the optimal parameters for a flawless weld. But for experienced welders, the ability to fine-tune settings provides ultimate control.

The Convex Pulse takes welding a step further. Its innovative pulse technology minimises splatter and distortion, creating a smooth, professional finish on even the trickiest materials like thin sheet metal, stainless steel, and aluminium. This is ideal for applications requiring superior aesthetics, such as car body repairs or intricate metalwork.

The Cea Convex is also a champion of portability. Its compact and lightweight design makes it easy to manoeuvre around workshops or take on-site for maintenance jobs.

Don’t settle for just any welder. Choose the Cea Convex & Convex Pulse and experience the difference.


  • Multi-process welding capabilities (MIG/MAG, MMA, TIG (lift arc))
  • User-friendly synergic control panel for effortless operation
  • Advanced pulse technology for splatter and distortion reduction (Convex Pulse model)
  • Suitable for welding a variety of materials, including mild steel, stainless steel, aluminium, and more
  • Ideal for both professional and DIY applications
  • Compact and lightweight design for ultimate portability
  • Robust construction for long-lasting durability

What’s In The Box

  • Convex / Convex Pulse
  • 4 rolls of wire Ø 0.8 – 1.0mm (Convex 321 & 325 Pulse) or 1.0 – 1.2mm (Convex 401 & 405 Pulse)
  • Programs for Fe – CrNi – Al and TIG / MMA functions
  • vision.COLD, vision.ULTRASPEED and ECP (Premium models only)


Part No. Description
004640 Convex 321
004645 Convex 401
004825 Convex 325 Pulse
004830 Convex 405 Pulse
004640PR Convex 321 Premium
004645PR Convex 401 Premium
004825PR Convex 325 Pulse Premium
004830PR Convex 405 Pulse Premium



Additional information




Free Delivery

Free Delivery




400v 3


Convex 321 , Convex 325 Pulse , Convex 401 , Convex 405 Pulse


Premium , Standard


Click and Collect:
Free Click and Collect with no minimum spend from our warehouse on the Empress Park, Southampton with on-site parking. Once your order has been processed, we will advise you when it is ready for pickup.  Just want advice?  No problem.  Feel free to call in to speak to one of our friendly experts.

EWS Fleet Coverage Areas: 
Southampton | Eastleigh | Winchester | Alton | Farnham | Petersfield | Havant | Hayling Island | Waterlooville | Fareham | Portsmouth | Gosport | Chichester | Arun | Worthing | New Forest | Christchurch | Salisbury | Wiltshire | Test Valley | Basingstoke and Deane | West Berkshire | Reading | Hart | Waverley | East Hampshire | East Dorset | Hampshire | Bournemouth | Poole | Lymington | Ringwood | Verwood | East Preston | Goring-by-Sea | Lancing | Shoreham-by-Sea | Steyning | Bramber | Horsham | Adur

Nationwide Delivery (all items excluding gas cylinders):
Free UK mainland (England, Scotland and Wales) delivery on orders over £85 inc. VAT.
UK mainland delivery is £7.50 inc. VAT on orders under £85 inc. VAT.
UK islands and Northern Ireland shipping costs may vary.

UK Delivery for Gas Cylinders:
Shipping costs for gas cylinders are calculated at checkout once the delivery postcode is entered.

International Delivery:
Please contact us for an accurate delivery quote.

321 401
Three phase input 50/60 Hz V +20% 400
Input Power @ I2 Max kVA 13 17,8
Delayed Fuse (l eff) A 20 25
Power Factor / cos φ   0,87/0,99 0,90/0,99
Efficiency Degree   0,87
Open circuit voltage V 63 63
Current range A 10 – 320 10-400
Duty cycle at (40°C) A 100% 280 300
A 60% 300 350
A % 320(40%) 400(40%)
Wires Ø mm 0,6 – 1,2 0,6 – 1,2
Standards   EN 60974-1 • EN 60974-5 • EN 60974-10
Protection Class IP 23S
Insulation Class   H
Dimensions  mm 660
 mm 290
 mm 515
Weight kg 41 42

Machine Servicing

We can repair all makes and model welding machines using genuine manufacturer parts.


Successfully calibrated welding equipment can maximise performance through high quality welds. A certified calibration by us will ensure that your welding machine runs to its best capabilities.

Cea Convex 321 Multi Process Welder - 400v Hero

Cea Convex & Convex Pulse Multi Process Welder – 400v

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