E-Stop Control System

The Emergency Stop Control System is the latest state of the art system that is designed for industrial applications and is outfitted with a
rugged stainless steel enclosure.


The Emergency Stop Control System is the latest state of art system that is designed for industrial applications and is outfitted with a rugged stainless steel enclosure. Midwest Cryogenics offers the most complete set of standard features while maintaining competitive pricing.

The EStop control system is designed to interact with the oxygen deficiency monitor or other monitors with proper connections. The remote actuated liquid nitrogen supply valve will close if one of the following occurs: power is lost, internal fault is detected within oxygen deficiency monitor or to the E control system, if an auxiliary alarm condition occurs , or if the oxygen monitor goes into a low oxygen alarm , or simply if the red emergency stop button is pushed.


  • Measurement Range: 0-25%
  • Red Backlit Digital Display: High resolution 3 ½ digit LCD. Reads full scale from 00.0% to 25.0%
  • Alarms: Two fully adjustable oxygen concentration alarms. Preset for OSHA standards, 20.0% Caution and 19.5% Danger. Dry contacts 3 A. @24VDC/115VAC
  • Status LED: Indicates Power, Safe Operation, Alarm Conditions and Loss of AC power
  • Danger Alarm: 95dB danger alarm preset for 19.5%
  • Battery Back-up: One hour
  • Analog Output Signal: Isolated 4-20mA
  • Data Logger: Logs data for 15 days @ one-minute intervals, 30 days @ two-minute intervals, etc.
  • Communications: RS-485 bi-directional
  • Power Requirements: 115 VAC< 10 watts
  • Repeatability: +/-0.1% of range or +/-0.1% of oxygen, whichever is greater
  • Operating Temperature Range: 0°-130°F
  • Diurnal Temperature Specification: < ±1% of scale over temperature range
  • 90% Full Scale Response Times for Specified Range: 0-25% < 12 seconds
  • Long Life Zirconium Oxide Sensor: 10-year life expectancy
  • Weather Tight NEMA 4X Package
  • Area Classification: Designed to meet General Purpose UL 61010-1 standard and IP 65 requirements. Approval pending.
  • Gas Connection: Diffusion screen. No pump or fittings required
  • Mounting: Wall mount or 2.0” pipe mount
  • Dimensions: 7.0″ W x 5.7″ H x 4.5″ D
  • Weight: 4 lbs
  • The Model 221R is a rugged piece of safety equipment designed for industrial applications.


    Acme Cryogenics has been delivering Excellent Quality, World Class workmanship & Customer Service for over 50 years. From Parts to Complete Plant Installation solutions. Acme cryogenics is there for all your industrial gas & liquid handling needs.
    Acme Cryogenics continues to expand and grow through the acquisition of companies that bring additional value and services to our customers. We have safe facilities across the USA to service not only the United States but globally as well. There are currently four manufacturing operations in Allentown, PA; Atlanta, GA; Lonsdale, MN; and Oxnard, CA and seven Field Service locations in Allentown, PA; Atlanta, GA; Houston, TX; Chicago, IL; Lonsdale, MN; South Plainfield, NJ; and Port St. Lucie, FL.
    As your leader in moving molecules in the industrial gas industry for over 50 years, we can offer technical assistance for your pipe system design, as well as cryogenic valves and cryogenic fittings, regardless of your level of experience. Our sales engineers have over 40 years of combined experience. Our product management, engineering, and quality departments work closely together to provide a steady flow of new features and expanded product offerings without compromising the reliability and performance that we are known for. Our manufacturing team has decades of experience and work in our newly-expanded valve-specific manufacturing area, located in our Allentown, PA headquarters.
    Acme Cryogenics specialists are readily available to assist you- Fill out a contact form, quote form or call us directly, We welcome the opportunity to deliver for you.
    Acme Cryogenics provides engineering, design, fabrication, installation, and repair services for the Food Packaging, Pharmaceutical, Semi-Conductor, Cryobiology, Medical Gas Pipe, Aerospace, and Industrial Gas industries.
    Acme Cryogenics provides an extensive suite of products and services for customers across the entire industrial gas supply and distribution chain.
    Acme has a full complement of highly trained Field Service Technicians who can expertly inspect, repair and maintain your cryogenic systems, medical gas systems, gas piping systems, (LNG) liquid natural gas fueling systems, industrial piping systems and more, assist your staff in peak times, or provide a cost-effective way to install and/or maintain your equipment. The Acme team can also assist in services such as site survey, equipment sizing, capital expenditure calculation, logistics services, and equipment supply.

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