Primary Safety Control : A control with a sensor that is directly responsive to the ignition device attributes necessary for the safe operation of the effect
NFPA 160 Standard for Flame Effects Before an Audience, 2001 ed. http://www.nfpa.org/codes-and-standards/document-i nformation-pages?mode=code&code=160, (Std: Flame Effects Before an Audience - Amer) {259 NFC}