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Midmark Ritter Ultraclave M11 Automatic Sterilizer Autoclave

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With one of the largest chamber sizes of any tabletop sterilizer on the market, the Ritter M11 is designed to optimize sterilization output—reducing time and effort, but not effectiveness.

The Ritter M11 UltraClave Automatic Sterilizer is the perfect solution to combat the emergence of many aggressive, infectious organisms, by providing efficient, effective instrument processing in your practice. The M11 is the largest member of the Ritter family of autoclaves. Its unique 11" x 18" chamber gives it the distinction of having the largest sterilizing capacity of any standard counter top sterilizer on the market, making it perfect for larger packs and instruments.

Please note free shipping only applies to business address location, with a dock. Otherwise, a flat $75 fee will be applied. This product may not be purchased by any dental professionals.


  • Steam–Flush Pressure Pulse Air Removal System ensures proper steam penetration


  • Simply load it, set it and forget it


  • Four pre-programmed and two programmable cycles

Technical Specs

Length w/plug: 23.8" (60.5 cm)

Width: 17.8" (45.2 cm)

Height w/printer: 17.8” (45.2 cm)

Minimum Countertop Area: 17.8"W x 21.0"D (45.2 x 53.3 cm)

Chamber: 11" x 18" (28 x 45.7 cm) 6.5 gal usable volume (24.6 L)

Trays: Two Large – 9"W x 15"L x 1.1"D (22.9 x 38 x 2.9 cm)

Two Small – 6.6"W x 15"L x 1.1"D (16.8 x 38 x 2.9 cm)

Unit Weight: 99 lb (44.9 kg)

Shipping Weight: 131 lb (59.4 kg)

Water Reservoir Capacity: 1.4 gal (5.3 L)


Midmark Instrument Processing Guide: 


Question & Answers
  • Is this brand new?

    Yes, all of our equipment at MedStock is ALWAYS NEW!

    Hope this helps you!

  • Are the Shelves inside of the Chamber of the M9/M11 adjustable/removable?

    The Midmark M9/M11 Autoclaves both have a removable tray rack. However the individual shelves connected to the tray rack cannot be removed or adjusted.

  • How do you remove and insert the tray rack on the Midmark M9/M11?

    Removal: After removing trays, pry upward on end of tray plate with a screwdriver while pulling tray rack and plate assembly out of chamber.

    Installation: Place back edge of tray in chamber. Pressing downward on top of tray rack, slowly insert assembly into chamber.

  • What is the water capacity of the Midmark Autoclaves reservoir?

    The Midmark M11 has a water reservoir capacity of 1.4 gal (5.3 liters)