It monitors air velocity to ensure the blower motor is moving enough air to prevent overheating and core damage before the system ignites

or verify manifold gas pressure before replacing the component

As a Single Pole Normally Open (SPNO) switch

Does it require a common (C) wire

and high-pressure R-410A applications

Parker R119-02B Regulator 30067439-890 It monitors air velocity toThe Parker R119 02B Regulator is a heavy duty, standard series pneumatic pressure regulator engineered for high flow industrial air preparation. Designed with a robust zinc body and a balanced poppet design, this unit ensures quick response and accurate pressure regulation even during wide variations in flow. This 1 4" NPT compressed air regulator features a substantial 300 PSI maximum inlet pressure and a 0 60 PSI reduced pressure range, making it