Precise Calibration: The #42 drill size provides the exact flow rate required for LP gas configurations in Johnson Controls HVAC parts

How do I know if this thermocouple has failed

providing the precise voltage delivery required for consistent pilot or main burner lighting

preventing equipment damage and hazardous conditions

Common Questions Is the S1-026-34028-001 a manual or automatic reset switch

System Sensor ST-3 Sampling Tube Precise Calibration: The #42 drillThe System Sensor ST 3 is a 3 foot metal sampling tube designed for HVAC duct smoke detection in air streams widths ranging from 2 to 4 feet. As a veteran grade replacement for the L 307 1, this rugged cold rolled steel component is essential for ensuring your InnovairFlex or legacy System Sensor DH100, DH200, DH400, and DH500 series detectors function according to code. When installing, always ensure the air inlet holes face directly into the airflow