i4s Smart Spot Welder
The only welder ready for the future, today!
C2X Arm
Full force welds in auto weld mode
The i4s Smart Gun
The on-gun display screen providing feedback
on every weld performed.
Prospot welder i4s smart spot welder

The i4s Smart Spot Welder features all the things technicians love about the i4 and more. Built-in training provides technicians with immediate resources to get the job done faster than ever. With our Wifi connectivity, you will receive automatic updates from Pro Spot and weld log reporting via email.

Auto weld feedback

Auto Weld Mode

Using continuous feedback information, the i4s quickly gathers and adjusts to the weld as its occurring providing accurate and proper welds.

is4 smart gun

i4S Smart Gun

Save time by clearing alerts or changing parameters directly with the on-gun display screen and fingertip controls. There is no need to go back and forth from the vehicle. 

360 Degree Arm Rotation

The new i4s gun comes with 306-degree arm rotation providing technicians more manoeuvrability where space on the car is limited. 

wifi icon

Wireless Connectivity

Staying connected is easier than ever with the i4s’ built-in wifi, which allows users to connect directly and quickly to access training videos, materials, and OEM procedures. 

On-board welding training

Onboard Training

With built-in speakers, headphone jacks and a high-resolution display, training delivery has never been easier.

i4s instant communication

Instant Communication 

The i4s can quickly communicate email weld logs in real-time with the press of a button to meet the increasing demands from the OEM, insurance companies, and certification programs.

Custom settings on i4s


Set and assign work orders on the welder to any technician to help maintain records and monitor workflow. 

i4s c2x arm


The all new, patented Pro Spot C2X Arms gives our resistance spot welders more versatility and ease of use than ever before.

Full Force Auto Weld

Our new C2X Arm is also the first C-X Style Adapter to allow users to weld in Auto Weld Mode. Users no longer have to switch to Manual Weld Mode.

Quick Connect

Quickly and Easily change from C style arm to C2X arm now comes with the Pro Spot quick docking system.

Extreme Clamping Force

Safely delivers up to 600daN meeting all OEM force requirements.


PSW-406 AND PSW-520

The biggest advantage of the new Arms is a wider distance to get around large panels in contemporary car designs. Arm design includes longer electrodes to reach those deeper pockets we see in todays vehicles. Additionally, water cooling is provided to the tip.


Throat Depth is 406mm


Throat Depth is 520mm

i4s auto weld technology



At the press of a button, the i4s measures the thickness of the metals automatically using the latest optical technology.


The i4s senses the metals to be welded from a pre-delivered current to determine the type of metal.


The i4s features a new cable-gun. Based on the thickness and resistance feedback information, the i4s delivers the correct weld power every time, regardless of type of metal or thickness.

i4s smart gun
i4s fingertip controls


The i4s features an all-new, advanced welding gun with an on-gun display screen that allows instant feedback on every weld performed.

The new i4s gun, with 360-degree arm rotation, also has fingertip controls allowing the user to change settings without needing to return to the machine every time they need to adjust weld parameters. The technician can freely move throughout the vehicle repair process in a fast and efficient manner.


With built-in WIFI, the i4s now allows users to instantly connect with Pro Spot for the latest software updates, training videos and content. Servicing your equipment is easier than ever before, instantly share information with Pro Spot for quick and easy troubleshooting. This feature helps eliminate guesswork and downtime so that shops can remain productive and profitable.

Access Training Instantly

Staying connected is easier than ever with the i4s’ built-in Wifi, which allows users to connect directly and quickly to access training videos, materials and OEM procedures.

Export Logs

This wireless connection also gives users the ability to export weld logs to meet the increasing demands from OEMs, insurance companies and certification programs. Easily export logs to the email of your choice or directly to a USB drive.


The i4s now makes training easier than ever. The i4s’ built-in Wifi allows users to connect directly and quickly to access training videos, materials and OEM procedures

Train directly on the machine with onboard training videos and files. The i4s has built-in headphone jacks and speakers to help with training. It doesn’t matter if it’s a loud shop environment or quite space, plug in or turn up the volume for the speakers to start training instantly.


Input Voltage:

  • 3 phase
  • 208 – 240V 50/60HZ
  • 400 – 420V 50/60HZ
  • 460 – 480V 50/60HZ

Welding Amperage:

  • 12500A max (3-phase)

Weld Cable Length:

  • 2.667m (8.75′)

Cooling System:

  • Radiator/pump active loop
  • Cooled to the caps


  • Wirelessly upgradable
  • Software platform


  • IP21

Shipping Weight:

  • 169 kg (373 lb)

How Can We Help?

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