Cleveland Controls DFS-301-112 Switch While the 100RB series is

While the 100RB series is durable

Designed for indoor lighting control and heavy-duty HVAC scheduling

and gas-fired combustion systems

The 100-foot length provides ample reach for routing through conduit and plenums in large-scale mechanical rooms

Cleveland Controls DFS-301-112 Switch While the 100RB series isThe Cleveland Controls DFS 301 112 is a precision engineered fixed set point airflow switch designed for critical monitoring in duct heaters, ovens, and high performance HVAC systems. As an airflow proving switch, it utilizes a sensitive silicone diaphragm and a snap acting SPDT switch to ensure air pressure rises meet specific operational thresholds before permitting equipment engagement. This model is factory calibrated to operate at a fixed 0. 03"