4-Gas Meter/PID Operator Registry

The 4-Gas Meter and PID Operator Registry recognizes first responders, fire fighters, environmental field technicians and workers in refineries, local HAZMAT, waste water treatment and confined space entry who use 4-Gas Meters and PIDs to assess field conditions and potential worker exposure concerns.  This registry program was developed by Subject Matter Experts from AIHA's Real-Time Detection Systems Committee.

The 4-Gas Meter and PID Operator Registry program recognizes operators with a minimum level of knowledge, training, and experience who regularly demonstrate their competency in the use of the instrument and application of the meter's readings.  To gain the credential, Registered Operator: 4-Gas Meter/PID Field Use, an individual must demonstrate competency in the skills and knowledge defined by the program’s Body of Knowledge (BoK).  This AIHA Registry Program is the first credential that provides recognition for individuals who have expertise in this area and will improve the overall quality of the detection of potential exposures by motivating individuals to develop the knowledge and skills needed to gain this credential.

Program benefits

Registration through application and successful completion of the competency assessment will allow registrants to engage in the full benefits of the registry program:

  • Listing on the Registry's database for consumer and industry access
  • Recognition as a credentialed professional among your peers
  • Use of individual insignia with registered identification number
  • Demonstrating professional integrity through competency assessment
  • Provide access to a community that shares best practices and solutions

Term of Registration 

The Registered Operator: 4-Gas Meter/PID Field Use credential is valid for two (2) years.  In order to maintain your registration status, application information will need to be updated and competency must be demonstrated every 2 years.


Click here to view the application process and download the documents required to enroll.

Click here to view the fees and payment options for the program.

Click here to for information regarding the program's Competency Assessment.

Updated: 09/23/2013