Demo Available
Demo Available
Terra Part # 4545-00A
Usually ships in 8-14 business days

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• Dry ice snow cleaning system

• Safely removes contaminants, including fingerprints and hydrocarbon residue

• More effective than nitrogen at cleaning particle-sensitive components

• Safe for use with microcircuit wires or energized electronic components

• Portable, easy-aim design and adjustable nozzles clean hard to reach surfaces

• Low operating cost

• DEMO AVAILABLE – Schedule a demonstration unit at your facility for no or low cost excluding freight. Please contact Evan Messenger at 714-578-6124 (

Weight, Product: 5 Lbs

Weight, Shipping: 9 Lbs

Dimensions, Product: 14"W x 10"D x 3"H

Dimensions, Shipping: 18"W x 14"D x 6"H

Unit of Measure: EA

Features and Benefits

The SNO GUN II High Precision Cleaner

The SNO GUN II™ High Precision Cleaner

  • Safely removes contaminants—including fingerprints, light hydrocarbon residue, and submicron
  • particles—using dry ice snow
  • More effective than nitrogen at cleaning wafers, chips, optics, and other particle-sensitive components
  • Safe for use with microcircuit wires or energized electronic components
  • Portable, easy-aim design and adjustable nozzles provide broad or very localized cleaning of hard-to-reach surfaces
  • Environmentally friendly operation eliminates the need for solvent disposal—contaminants are carried away in a stream of inert CO2
  • Low operating cost: CO2 is inexpensive and readily available
  • CO2 Consumption: 36 lbs./hr. under continuous duty

The SNO GUN II provides a safe, inexpensive, highly effective alternative to solvent or dry nitrogen cleaning of semiconductor components, PC boards, and other sensitive parts.

Removes Surface Contaminants as Small as 0.1 Micron

Dry ice particles generated by the SNO GUN II penetrate the boundary layer immediately adjacent to the surface. Contaminants that are untouched by nitrogen guns are dislodged and carried away in the flowing stream. Light organic contamination may be removed by the localized solvent effect created when dry ice particles impinge on a surface.

The SNO GUN II cleaning process does not scratch delicate semiconductor or precision optical surfaces. Even the finest wires in microcircuitry remain undisturbed. CO2 is non-conductive, allowing electronic components to be safely cleaned even while energized.

The hand-held SNO GUN II is transportable to wherever cleaning is required. Simply attach the SNO GUN II to a CO2 cylinder and start cleaning more effectively.

Complete Line of Features to Meet Every Application

The SNO GUN II comes with interchangeable nozzles with 9 standard combinations. By changing the nozzle configurations, you can adjust the spray pattern, size, and force of the dry ice particles. Micro-particles can be generated in the < 1mm diameter range with a velocity from 150 fps to 1000 fps (45.7 m/s to 304.8 m/s) that produce an aggressive dry ice storm capable of removing light oils, light greases, and hydrocarbons. Fingerprints can be removed from many surfaces. Three extension tubes provide larger, more gentle snowfall capable of cleaning unadhered particles down to 0.1 micron without disturbing delicate substrates.

The SNO GUN II includes a .5-micron filter inside the valve for point-of-use filtration, a Teflon-jacketed nozzle design that minimizes condensation, a 10' (3048 mm) flexible hose (for connection to a standard gas cylinder), and hard plastic storage case.

The SNO GUN II provides safe, effective, economical cleaning in a wide range of critical applications.

  • Silicone Wafers: The speedy cleaning process effectively removes contaminants as small as 0.1 microns from wafer surfaces. Versatile tip configurations allow adjustment of force and pattern of dry ice spray to ensure safe cleaning. Select Terra's DryClean™ Glove Box to prevent moisture condensation.
  • Hybrid Circuits: Short blasts of dry ice snow typically remove all particles from hard-to-reach recesses in hybrid packages without disturbing delicate wire bonds. Applying and slowing heating Methyl Alcohol to its boiling point and then re-spraying the area with dry ice snow can remove stains.
  • Disk Drives: The SNO GUN II safely removes particles from disk heads, drive cavities, and magnetic media itself. Automated configurations can be installed for continuous operation on assembly lines. Flat Panel Displays—The SNO GUN II is ideal for removal of particles, fingerprints, and other light residues on FPD substrates and glass prior to coating.
  • Optics: From a 400-inch (10160 mm) telescope mirror to 20-mm by 20-mm photoelectric cells, CO2 cleaning removes dust particles and light hydrocarbon contamination without surface pitting.
  • Medical Devices: Cardiac and ophthalmic shunts are cleaned to a precision level. Medical tools and instruments have dust, light oils, and fingerprints removed.
  • Micro-mechanical assemblies and other precision parts: Removes dust and deposits from gyroscopes and microvalving components. Ideal for difficult to reach areas (threads, orifices).
  • PC Boards: By altering the nozzle configuration, you can pinpoint highly localized contaminants or remove fingerprints and other residues from larger surface areas.

Sno Gun II Dry Ice Cleaner

Sno Gun II high-precision handheld dry ice cleaner removes contaminants without leaving residue; perfect for sensitive semiconductor, microelectronics and optical parts cleaning.

On a tight schedule? Choose FasTrak 24/7 Priority Service to help meet your critical schedule for Terra-manufactured products, either before or after your order is placed.*

  • FasTrak 24/7 provides a 24/7 commitment to meet the shipping date YOU specify, regardless of quoted lead times.
  • FasTrak 24/7 assigns a dedicated production team plus a dedicated senior expeditor working three shifts to meet your delivery specification.
  • FasTrak 24/7 guarantees* to meet the agreed-to specified ship date.

Call for pricing. FasTrak service fees cover costs of additional services only, without additional profit.

 * Terra's FasTrak services limited guarantee: to ship on the ESD or date specified OR to refund up to 100% of FasTrak charges. This guarantee covers no direct, special, consequential or other damages and is strictly limited to up to 100% of the amount paid for FasTrak service. When a specified ship date is missed due to factors outside Terra's control (vendor performance, deliveries by shipping companies, etc.) and random factors such as accidents, the credit of up to 100% of the FasTrak 24/7 may not apply. FasTrak service requested after order placement will be quoted and accepted based on available time remaining before required ship date.

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