Request Info

Tell Us About Your Welding Project



Orion 150s Pulse Arc Welder - Our best selling model!

In stock (999965 items available)
Not rated yet
  • $5,900.00

The Orion 150s boasts a power potential of up to 250 joules of pulse-arc weld energy. While powerful, the 150s is perfect for low power needs as well—yielding as little as 1 joule of energy. Whether an application requires high power welding needs or intricate, precise welds around precious components, the Orion 150s offers a versatile, compact, and affordable welding system in an easy-to-use package. 

Orion 150s Users Guide

Orion 150s Datasheet

  • Sunstone Circle Protection Plan Subscription

    The best protection your investment has ever seen!


The Precision Micro-Welder Technology You Need!

The Orion 150s is the ideal welding tool for any micro-welding application. The 150s welders can be seen in laboratories, universities and research & development institutions around the globe.

Key Features

Touchscreen-Icon.pngTouchscreen Simplicity. All Orion welders are controlled digitally using your finger. No clumsy, analog knobs!
Energy-Control-Icon.pngDigital Energy Control. Choose how you want energy delivered to your workpiece for better creative control.
Power-Range-Icon.pngBroad Power Range Precision. Dial the power down or up, in one-tenth of a Joule increments, from 0.2 to 200!
Weld-Speed-Icon.pngMultiple Weld Speeds. For joint sealing, choose to weld as fast as one weld every five seconds with the 200i.
Customer-Service-Icon-website.pngWhite-Glove Customer Service. With more than 15 years of experience, we can answer your questions.

Certified Safe!

Most Orion micro welders are ETL and CE certified now or in the process of becoming certified.  ETL certification includes ASME, ASTM, ANSI, CSA, NFPA, NOM, NSF, and UL testing. 

Made in the USA Quality

All Orion micro welders are proudly made in the USA. When you purchase an Orion micro welder you can be confident of welder quality and safety—and support American workers.

Friendly US-Based Customer Service

Help is just a phone call away! In minutes you'll be speaking with a US-based, native-English speaking and experienced customer service representative ready to solve your welding challenges. Call or text +1 801-658-0015. Our customers love our products but they rave about our service!

A Brand You Can Trust

Sunstone has been manufacturing micro welders for more than fifteen years! We're constantly making improvements and adjustments to our customers' benefit. When you choose an Orion micro welder you can be confident in quality, safety, and reliability.

Continuously Improving to Serve You

As a certified ISO 9000/2015 organization, Sunstone is continuously improving processes and procedures that result in higher quality and the absolute best customer service.


Power Supply Footprint (L x W x H)30.5x12.7x25.4 cm
Total Weight19.9 kg
Input Voltage100-240 VAC (AUTO DETECTED)
Energy Range (Joules)1-150 J
Estimated Weld Spot Diameter Range≈ 0.5 - 3.5 mm
Display (Touch Screen)20 cm
Weld Speed1 weld/0.3 seconds
High Frequency Agitation OptionsMultiple
Available Power Settings280
Save Settings Spaces1000+

How Does it Work?

Electrical Energy – Plasma Discharge

Micro TIG/Pulse Arc welding uses electrical energy to create a plasma discharge.  The high-temperature plasma, in turn, melts metal in a small spot. This process takes place in milliseconds. The process is clean and very controllable – perfect for intricate and minute welding applications on precious and non-precious metals!. Filler metal can also be added to build up joints and create strong and reliable weld “beads”, or weld seams.

Two in One Combo

The Orion is a Micro TIG (also known as Pulse-arc) welder and a capacitive discharge resistance welder in one. This combination of abilities allows for infinite creative possibilities.  In its "Arc Mode" (micro TIG/pulse-arc welding), the can be used to perform permanent welds, add metal, and do a variety of other amazing and time-saving applications. In its "Tack Mode" (capacitive discharge resistance welding), the can be used to temporarily position parts before welding or soldering.

The Basic Principle of the Orion Welding System is very simple.

1.) Attach The Grounding Clip

2.) Use the Specialized Microscope that is focused on the Welding Electrode Tip.

3.) Simply Touch the workpiece to the electrode and a weld is triggered.

4.) A Perfect Weld Every Time!

Included Accessories

Every Orion s-Series Welding System includes the following items:

sunstone-welders-orion-plug.pngPower Cord
(International Converter Included)
sunstone-welders-orion-grounding-cables.Alligator Grounding Clips
(2 Count)
sunstone-welders-orion-stylus.pngStylus Hand Piece
(Pre-Installed with 1.0mm Collet)
sunstone-welders-orion-ring-clamp.pngJump Ring Pliers
(2 Count)
sunstone-welders-orion-electrodes.pngTungsten Electrodes
(5 - 1mm)
sunstone-welders-orion-microscope.pngShuttered Microscope
(Mounted on Articulating Arm)
sunstone-welders-orion-argon-tub.pngArgon Tubing
(1/4″ OD Clear Argon Tubing)
micro-tig-welder-pulse-arc-welder-accessMicroscope Eye Covers
(1 Set)
sunstone-welders-orion-allan-wrenches.pnHex Wrench Set
(Every Hex wrench used on the Orion included)
sunstone-welders-orion-electrode-collet.1.0mm Collets
(For use with Orion Tungsten Electrodes)
sunstone-welders-orion-foot-pedal.pngFoot Pedal
(Used to precisely trigger welds)
micro-tig-welder-pulse-arc-welder-accessFiberglass Brush
(Used to clean blackness from weld area)
sunstone-welders-orion-diamond-disk.pngDiamond Disc
(For Use with any Rotary Tool to Sharpen Electrodes and Clean them)

Needed Accessories

Got%20Gas.jpgArgon Gas
Click here to learn more or add to your cart

1589315368680.pngArgon Gas Regulator
Click here to learn more or add to your cart

User Manual

Click here to view Sunstone's Orion 150s User Manual

Sunstone Circle Protection Plan


This product is available to purchase with a Sunstone Circle Protection Plan!

Do You Need Training?

Sunstone's training team is ready to help you master the Orion 100c for any particular application, like permanent jewelry, Visit our Training Page to learn more.

Introducing the Sunstone Circle Protection Plan


For your welder, it's a scary world out there! Welders get dropped, get abused, or just stop working. You have to protect your welder for any unfortunate incident. And the Sunstone Circle Protection Plan is an innovative way to safeguard your welder investment.

The Sunstone Circle is much, much more than an extended warranty. Here's what a small monthly subscription will deliver in peace of mind and exceptional customer service:

Sunstone Circle Protection Plan

Forever Warranty
For as long as your welder is covered by the Sunstone Circle your warranty never expires. You’ll never deal with lifeless warranty extensions, but rather enjoy a forever warranty. And that’s a big circle of protection!

Complimentary Loaner
If you need a loaner unit while your welder is being repaired, we’ll send one. We’re going to do all we can to keep your production levels up. If you’re in the circle, we’ll take care of you!

Free Replacement
Sometimes it makes more sense to simply replace a welder with the newest model rather than make a repair. At Sunstone’s discretion, we’ll send you the newest model to keep your shop happy and healthy!

Free Software Upgrades
When your welder is powered by the latest software improvements your shop becomes more productive and capable. You’ll have access to all software upgrades when you join the Sunstone Circle!

Complimentary Shipping
Should your Sunstone welder ever need repair, we’ll cover the shipping costs for ground service within the United States. If you need it faster, simply pay the difference. Need it shipped internationally? Give us a call!

Expedited Customer Service
At Sunstone every customer is a VIP, but when you’re part of the circle your request for customer service gets moved to the front of the line. You get extra attention! Just another perk when you subscribe today.

More Valuable Member Benefits!
You’ll receive snazzy Sunstone swag, a subscription to Micro Welding Today magazine, invitations to VIP events, Inside the Circle e-newsletter, and new product trial opportunities. Call now to join the circle!

Learn More!

Check out Sunstone Orion 150s in action!

Weld Stainless Steel Cannula

Pulse Arc Welder Overview with Patrick McMillan

    • Weight
      23 lbs
    • SKU
  • CE Certified
  • On Screen Training Videos
  • Upgradable Software
  • Welder Max Output Voltage
    150 Joule, 250 Joule
  • Model
    Welder with Microscope, Welder with Auto Darkening Lens
  • Micro TIG (Pulse Arc) Welder Specifications
    • Welding Energy Range (Joules)
      1-150, 250 Joules
    • Weld Spot Diameter Range
      ≈ 0.5 - 3.5 mm
    • Display (Touch Screen)
      20 cm
    • Max Weld Speed
      1 weld/0.5 seconds
    • Available Weld Energy Settings
    • High Frequency Agitation Options
    • Save Setting Spaces
    • 5x Microscope Magnification
    • Microscope IR & UV Eye Protection
    • 20+ On-screen Languages
    • Foot Pedal Input
    • Arc Start Technology
    • Tack Mode
    • Basic Screen Metal Presets
    • Adaptive Weld Ignition
    • Dynamic Energy Adjustment
    • Multiple Welding Waveforms
    • Pico Mode
  • Premium Argon Gas Regulator
    • $149.00
  • Orion Micro TIG Welding Electrodes
    • $75.00
  • Argon Tank
    • $399.00
  • Argon Tubing
    • $15.00
  • Orion mPulse Pulse Arc Welder
    • $2,400.00
  • Orion 150s Circle Protection Plan
    • $30.00
    • Only for registered users
  • Circle Protection Plan Tier 2
    • $30.00
    • Only for registered users
  • Premium Argon Gas Regulator
    • $149.00
  • Orion Micro TIG Welding Electrodes
    • $75.00
  • Argon Tank
    • $399.00

Related products

  • Orion 150s Circle Protection Plan
    • $30.00
    • Only for registered users
  • Argon Tank
    • $399.00
  • Argon Tank for Permanent Jewelry
    • $399.00
  • Argon Mini Small Argon Tank for Permanent Jewelry
    • $145.00
  • Argon Tank - Limited Edition Pink
    • $399.00
  • Premium Argon Gas Regulator
    • $149.00
  • Premium Argon Gas Regulator for Permanent Jewelry
    • $149.00
  • Deluxe Argon Gas Regulator
    • $100.00
  • Deluxe Argon Gas Regulator for Permanent Jewelry
    • $100.00
  • Argon Mini Regulator
    • $100.00
  • Orion Micro TIG Welding Electrodes
    • $75.00
  • Orion and Zapp Electrodes for Permanent Jewelry
    • $75.00