The air balancing technician is the most qualified individual to test your duct detector for the for the following reasons.
1. If he has done his job correctly he already know the SP (static pressure) drop accross the detector. This is one of the requirements for the test.
2. The air balance technician will also be able to calculate or measure the FPM (feet per minute) of air that is in the duct work.
3. All air balance companies can be the “independent third party” that is required for most cities in Arizona.