410-833-7170 - We have many more products. Please call us for inquires.



Atmospheric Products and Services was founded by Patrick McCarthy, Sr., a graduate of the Virginia Military Institute - he is well respected in the Industry.

Patrick has over 35 years experience in the Gas Products Industry.
*Please Allow Us To Earn Your Trust*
Professional Certifications:

NFPA 471 – Recommended Practice to Responding to Hazardous Materials Incidents
NFPA 472 – Professional Competence of Responders to Hazardous Materials Incidents
OSHA 29 CFR 1910.12 Operations - HAZWOPER
OSHA 29 CFR 1910.12 Technicians – HAZWOPER
ASSE 6040 Medical Plant and Maintenance Compliance
ASSE 6030 Medical Pipe Verifier
ASSE 6020 Pipe Inspector
ASSE 6015 Medical Bulk Vessel Installer
ASSE 6010 Medical Welder/Brazer
Mil Spec Welder Certified DSF023
MVE Cryogenic Bulk Vessels and Vacuum Jacketed Pipe Program
Emergency Toxic Containment Vessel Response
Semi- Gas – Gas Cabinet and Process Program
OSHA -HM-126 Hazardous Materials Transportation
OSHA 29 CFR 1910.1030 Bloodborne Pathogens
Life Safety 101
Advanced Technician Training CryoBio Equipment
Certified Training Powerex Medical Vacuum Pumps and Medical Air Compressors
Electrical Troubleshooting and Preventive Maintenance Program
Western Enterprises Manifold Service and Repair Program
Pumps, Packings and Mechanical Seals Certification
Cell Culture Compliance Program
Factory Authorized Distributorships and Repair Facilities:

Matheson Tri-Gas – Specialty, Electronic Gas Products and Equipment
Semi-Gas Gas Cabinets
Advance Specialty Gas Equipment
Mil Ram Gas and Fire Detection Systems
Air Liquide Bulk Gases
Airgas Safety Products
Airgas Gas Products
Taylor Wharton Cryogenic Bulk Tanks Division
MVE Bulk Cryogenic Tank and VIP Systems
Acme Cryogenics
Precision Regulators
Concoa Specialty Equipment
Western Enterprises
Air Products and Chemicals
Precision Technics – Emergency Cylinder Coffin
Analytical Technologies
Powerex Medical Air Compressor and Vacuum Pump Systems

AWS – American Welding Society
NFPA – National Fire and Protection Association
MSA – Mine Safety Association
ASSE – American Sanitary Society of Engineers
FDA – Food and Drug Association
Solid State Technology
CGA – Compressed Gas Association
USP – United States Pharmacopoeia
Maryland Chemistry Association
Maryland Fire and Rescue Institute
NITC – National Inspection Testing Certification Institute
NIST – National Institute of Standards and Technology
Medical Gas Professional Healthcare Organization
Below are some of the testimonials that Patrick McCarthy, Sr. has received during his career:
Mr. McCarthy

Thank you for your participation in the Third Annual Cell Culture Course. Based On the student evaluations, the course was a huge success. Ninty four per cent of the attendees would recommend the course to others. All speakers were well received as was the written material.

Dr. Margaret B. Penno
Johns Hopkins University
School of Medicine

Virginia Military Institute

I wanted to personnally thank you for your support and execution of the FDA seminar held in Baltimore. "Surviving an FDA Audit" was an overwhelming success. the 35+ in attendance were glad they attended this seminar.

Your organizational skills insured the material was professional and appropriate for the audience. Also our plant personnel were able to gain a better understanding of FDA requirements.

Micharel J. DeMos Chuck Leggett
General Manager President
Potomac Airgas Inc,
Linthicum, MD
Mission Statement:

"To offer the best sales and service by winning and keeping customers in the Atmospheric Gas Products Industry"

Our Purpose Statement:

"We exist to glorify God by being a faithful steward of all that is entrusted to us and to have a positive influence on all who come in contact with Atmospheric Products and Services (APS)."

I would like to express my appreciation for your help on the set up of the Centimark bulk propane. Your quick response to our customer's needs enabled them to get their equipment up and running on schedule.

Joe Sarisky
Sales Representative
Potomac Airgas Inc.
Allentown, PA
Dear Mr. McCarthy:

The Office of Health and Physical Education is inviting you to participate in the Baltimore County Public Schools Health Education Advisory Council. This council reviews for approval, the health education materials of instruction recommended by curriculum writers, teachers and the Office of Health and Physical Education. The council meets once or twice per school year. Occasionally, individuals members may receive requests for material reviews throughout the school year from the Office of Physical Education.

The council serves a very important function in the delivery and maintenance of a sound health education program in Baltimore County Public Schools.

Please call Barbara Sullivan for additional information. Thank you in advance for your involvement in the council.


Barbara Sullivan
Office of Health and Physical Education
Baltimore County Public Schools

Dear Pat,

In the fall of '97 I wrote to you seekingy your support of my applicstion for promotionto the Academic Rank of Professor. It is with deep gratification that I can report to you, that my promotion has recently been approved and will become effective with the begining of the 1999-2000 Academic year.

The reason for the delay is reflected in the need to satisfy the "Qualifications and Procedure for Promoting to Professor Extraordinary Faculty Who Do Not Hold A Terminal Degree" as specified on our Faculty Handbook. It is my understanding that this policy - requiring review and approval by the department P&T (twice); the University Criteria and Screening: and the Department P&TCommittees - is being evaluated and may undergo revision in the forseeable future. Perhaps changes will permit other "extraordinary" faculty to pursue their promotional career goals in a more timely fashion.

Your responsive to my appeal for support of my promotion was truly overwhelming. I will never forget your favorable assessment and evaluation of my varied efforts over the years in developing and implementing improvements in our academic program, department and university. I am truly humbled by your positive expression of recognition of my efforts in my multifaceted teaching career.

Thanks again for your past support and hope that I may continue to be worthy of your trust and confidence in me.

Very truly yours,

Frank R. Milio
Towson University