While the 3/8" x 5" copper bulb can be used for air sensing

requiring standard brazing techniques and nitrogen purging to prevent internal oxidation

How do I tell if this run capacitor is failing

Is this compatible with older McQuay horizontal AHUs

Greenheck 460511 Limit Switch 318518-761 While the 3/8" x 5"The Greenheck 460511 Limit Switch is a critical safety component designed for high performance air handling and ventilation systems. This OEM Greenheck replacement part acts as a thermal safeguard, monitoring air temperature and breaking the electrical circuit if limits are exceeded to prevent equipment failure. Engineered for precision, the 460511 high limit switch features a fixed temperature setpoint calibrated for industrial HVAC applications,