Hvac overflow switch monitors the liquid level in various residential and industrial applications and is typically connected to a pump, valve (solenoid valve, electric ball valve, etc.), or an alarm to notify a user. Due to the variety of designs and types, they can be used in a wide variety of applications.

Soloon Controls (Beijing) Co. Ltd. was established in April 2000 and is a leading electric damper actuator manufacturer specializing in both R & D as well as manufacturing. The company is located in the National Economic and Technological Development Zone in Beijing, China, where has its own production base and head office building.