Established in 1961, Sisma is a worldwide recognized name for the design and production of extremely high precision machinery such as Laser Welders and Laser Markers/Engravers for the jewelry and industrial markets. Innovative by vocation, Sisma combines an independent and cutting edge design and production organization with a wealth of highly specialized human resources, thus guaranteeing top product quality as well as thorough and prompt assistance throughout the world.

Sisma’s philosophy, aimed at satisfying the specific needs of customers, is the result of an inborn strategic imperative that contributes to affirming the role of Sisma as a maker of excellence in the world of industrial mechanics.

At Sisma, their extensive experience and technical know-how blends with productive efficiency and innovative spirit which promptly answers to the ever changing marketplace. The power to create special, customized machines is but another jewel in Sisma’s crown of excellence. Look no further…Sisma is the machine of choice for the above-mentioned markets all over the world! Machines are proudly manufactured in Italy.

Gesswein and Sisma presents the newest range of Welders that are the most Superior on the market today! The newest range of welders include the “Easy Access” (LM-D Ready) models that feature a broader opening that is covered with hanging rubber strips for your protection. The next step up is the traditional standard model (LM-D Scope) that features a high quality Leica Microscope head. Next in the series is the upgrade to the standard model (LM-D Vision) that features an intuitive 10.1 LCD Screen for easy visibility and simplified use.

Sisma’s latest addition to their line of manual welders is the LM-DT Dual, which combines the Leica 10X microscope and a 10.1″ high definition LCD. Available in 180 and 210 joules. Equipped with smart spot technology for consistent weld quality at high frequencies, a dedicated HEPA hood for easy machine access and Ethernet connectivity for remote diagnostics. For more information see the related products below.

Key Features:

  • Smart Spot Technology for sustained weld quality at high repetition. *
  • Welding chamber has a high power fume extractor with durable HEPA filter. *
  • 40% cooling capacity compared to previous models. *
  • The Leica microscope operates at 10X magnification, while the screen offers a digital zoom of 10X up to 13X.
  • Hinged hood system for ease of opening the machine. *
  • Ethernet port for remote diagnostics and troubleshooting.
  • All machines have argon and air compressor hookups.
  • 2 year warranty, which includes the flash lamp.

(*) All Models except LM-D Ready Models


Model: LM-D Ready LM-D Scope LM-D Vision
150 180 180 210 180 210
Source Type Nd: YAG (Lamp)
Wavelength 1064nm
Laser Power 60W 80W 80W 85W 80W 85W
Pulse Duration 0.3-20ms
Pulse Frequency 0-50 Hz
Max Peak Power 7.5 kW 9kW 9kW 10.5kW 9kW 10.6kW
Max Pulse Energy 150J 180J 180J 210J 180J 210J
Spot Diameter 0.2/2mm (0.1mm Opt)
Smart Spot Tech No No Yes Yes Yes Yes
Eco Mode Yes
FPS (First Pulse
No No Yes Yes Yes Yes
HDMI Option
(sold separately)
No No No No Yes Yes
Power Supply 230V, +/- 10%, 50/60 Hz
(L x W x H)
22.5″ x 29.5″ x 20.1″
(567 x 744.5 x 512mm)
22.5″ x 28.75″ x 20″
(567 x 730 x 510mm)
22.5″ x 28.75″ x 24″
(567 x 730 x 612mm)
Weight 132 lbs. (60 kg)
Crated Weight 200 lbs. (91kg)
Warranty 2 Year (Flash Lamp Included)


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