i4s | Smart Spot Welder Made in the USA

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 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.

Locate a Distributor

C2X Arm Back to top

  • 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 Clapming Force

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

NEW Extension Arms - PSW-406 and PSW-520Back to top

New Large 420n and 520 arms for i4s
  • 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

  • PSW-520

    Throat Depth is 520mm

Auto Weld Back to top

auto-weld iconography with touch screen interface
  • Measure

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

  • Sense

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

  • Weld

    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.

The New i4s Smart Gun Back to top

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.

Wireless ConnectivityBack to top

i4s Wireless Connectivity

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.

Training Made EasyBack to top

  • 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.

  • i4s Onboard Training
  • i4s Built-in Headphone Jack and Speaker

Technical Specifications

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:
  • 8.75' (2.667m)
Cooling System:
  • Radiator/Pump Active Loop
  • Cooled To The Caps
Microprocessor: Wirelessly Upgradeable Software Platform
Protection: IP 21
Shipping Weight: 373lb (169kg)


  • In Gun Display Screen
  • Finger Tip Controls
  • Water Cooled Gun & Arms
  • 360 Degree Arm Rotation
  • Wifi Connection - On-Board Wifi
  • Software Updates Always Available
  • Built in Audio and Video Playback
  • Touch Screen
  • Auto Weld Mode
  • Manual Weld Mode
  • Single-Sided Welding