P2131 Automated Field Steam Sterilizer

(P/N: P2131, NSN: 6530-01-641-4641)
(ECAT Contract #: SPE2DH-22-D-0016)

The P2131 Automated Field Steam Sterilizer is a U.S. Food and Drug Administration (FDA) cleared pre-/post-vacuum steam sterilizer. It is a modernized, fully automated version that replaces the M138 (Bertha) previously used by the U.S. military. This sterilizer handles up to 36 lb of wrapped instruments per load and is perfect for any military Role 3 field hospital. The Water Recovery System (WRS) is an integral part of the P2131 that recovers water from each cycle and provides the mechanical means to create the pre-/post-cycle vacuum.

This autoclave combines the safety and efficacy of microprocessor-controlled pre-vacuum 270°F sterilization cycles with the ruggedness, portability, and reliability required for various harsh environments. Whether the ambient conditions are 40°F at 8,000 feet altitude or 130°F at sea level, the P2131 sterilizer was designed and has been rigorously tested to ensure consistent, dependable operation regardless of extreme conditions.

The P2131 can process up to 100 loads while using only 10 gallons of potable water, which conserves this valuable resource often scarce in remote locations. The P2131 also features automated cycles, easy-to-set-up-and-use design, and a host of safety features, making it the obvious choice for steam sterilization in a field environment.

The P2131 can be used with the Electrical Distribution Panel model SAF-001.

Clean Water Equipment


  • FDA-cleared
  • Meets applicable requirements of ANSI/AAMI ST8
  • Includes an FDA-cleared 10-minute wrapped instrument cycle for complex sets requiring extended exposure times
  • Offers the best in steam sterilization technology with a pre-/post-vacuum dynamic air removal process
  • Reduces water usage and provides the capability to run 100 cycles with only 10 gallons of water


  • Rigorously tested to ensure consistent performance in a variety of austere environments
  • Lightweight and rugged all-welded high strength aluminum alloy construction
  • Simplified design improves maintainability
  • Water softener extends component life and reduces costly downtime


  • Chamber is designed, fabricated, and tested to ASME Section VIII Division I standards
  • Meets applicable requirements of electrical safety standards UL-61010-1 and IEC-61010-2-040
  • Door safety switch prevents a cycle from starting if the door is not locked
  • Instrumentation and alarms are designed to abort a cycle upon abnormal conditions


  • Fully automated cycles free up CMS technician’s time to improve productivity
  • Pre-programmed FDA-cleared cycles include:
    • Immediate Use
    • Textiles
    • Wrapped instruments
    • 4- and 10-minute cycles
    • Bowie Dick and Vacuum Leak test
  • Log data at the end of each cycle allow operators to verify critical information
P2131 Automated Field Steam Sterilizer
P2131 Automated Field Steam Sterilizer


Sterilizer Main Unit


The SMU contains a 16” diameter x 36 long (4.2 cf ) sterilization chamber capable of sterilizing up to 36 lb of wrapped instruments. Endcaps enclose the unit to protect the chamber door and the rear connection points, as well as create a self-contained shipping crate. Eight handles allow the unit to be transported by 4 to 6 people. Once in position, the endcaps fold down and lock into place to create a stand for the sterilizer.

Water Recovery System


The WRS is an essential part of the system, not only recovering water from each cycle, but also providing the mechanical means to create the pre-/post-cycle vacuum. The WRS allows the sterilizer to run 14 days, or 100 cycles, without adding water and it tucks neatly underneath the SMU.

Sterilizer Water Softener


The SWS is a critical part of the system that removes minerals that produce scale buildup on the SMU heating elements and other components. The SWS is equipped with a manual hand pump as a contingency for the lack of a pressurized potable water source.

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