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Professional Analytical and
Consulting Services, Inc.

Chemical Sensors for Airborne Detection – Industrial Safety and Hygiene

PACS Course Number 810

9 AM to 5 PM

This course is designed and intended to present a fundamental understanding of gas sensing with specific reference to industrial safety. The primary goal of this course is to be a resource for personnel who are charged with making critical decisions with regard to choice, specification, or purchase of systems intended to perform environmental monitoring of chemicals important to industrial safety and hygiene. Therefore, the needs of Safety Officers, First Responders, or Industrial hygienists and those who manage or advise such personnel will be of primary interest. Major and minor (in terms of numbers of units deployed in the field) types of sensors will be presented, along with underlying principles of operations and the idiosyncrasies, and interpretation of data. Sufficient background information will be presented so that students without technical degrees will obtain maximum benefit from the coursework. However, the topics will be covered in sufficient detail that the advanced student will obtain an enhanced understanding of these very important sensor types.

Dr. Towner B. Scheffler is your highly qualified instructor. Dr. Scheffler’s current research interests are focused on the development of new and novel means of gas sensing, particularly with regard to the detection and measurement of Chemical Warfare Agents (CWAs) and Toxic Industrial Chemicals (TICs). He is an authority on electrochemical (amperometric) gas sensors for toxic gases such as carbon monoxide, and also for gases of medical and safety interest, such as oxygen. Other research interests include heated catalytic bead sensors for the detection of potentially explosive atmospheres. He is also active in the development of spectroscopic methods for the detection of gases and in various types of chemi-absorptive and ionization sensors, also intended for the detection of gases. Dr. Scheffler holds twelve US and foreign patents in the general area of gas sensing.

PACS courses related to activated carbon are titled:

Course Registration is available. You may also register through an associated conference registration. Send it with a payment of $1250 to secure your course attendance. Hotel information and a map will be sent to confirm your registration. Please list your special interest(s) on the registration form. Enrollment is limited to assure your maximum course benefits. On-site PACS courses are available (most PACS courses can be provided at your time and place). Telephone PACS at 1.724.457.6576 if you need further information. PACS also provides laboratory testing and consulting services.

Chemical Sensors for Airborne Detection – Industrial Safety and Hygiene

Course Instructor: Dr. Towner Scheffler under the auspices of PACS

Course Outline
A. Welcome
1. Announcements
2. Introductions
B. Industrial Hygiene
1. The “big four” — CO, H2S, O2, & combustible gas
2. Minor variants
C. Characteristics of “good” gas sensors
D. Electrochemical Sensors — CO, H2S, &O2
1. Introduction to electrochemistry
2. From batteries to sensors
3. Amperometric gas sensors
    • a. Structure and characteristics
    • b. Operational considerations
    • c. Toxic gas sensors – CO Sensors as archetypes
    • d. Special considerations for oxygen sensors
E. Combustible gas sensors
1. Explosive Atmospheres
2. Sensor Types
    • a. Catalytic bead – principles, characteristics, & operation
    • b. Thermal conductivity
    • c. Metal Oxide (MOS)
    • d. Infrared (IR)
F. Other sensor types
1. Photoionization detectors (PID)
2. Potential Emerging Technologies


View the PACS Short Course Calendar–>

Course participants are encouraged to e-mail questions:

George Nowicki
Lab Manager

Rich Capp
Office Administrator

Send samples and postal inquiries to:
PACS, Inc.
409 Meade Drive
Coraopolis, PA 15108

Other PACS contact information:
Phone: 1-724-457-6576 or 1-800-367-2587
PACS website:

Please list your special interest during registration. We will try to accommodate your interest.

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