TH2B424 is a SSAC (Sigma Snow and Ice Control) brand temperature and humidity cutoff switch. It is used in air handlers, walk-in freezers, and refrigerators to maintain an optimum temperature and humidity level. The device has two temperature and humidity cutoff settings that can be adjusted to meet the requirements of the system. It consists of a temperature-sensitive element, defined by factory settings, designed to constantly monitor the temperature and humidity of the environment. When the environment drops below or rises above the set value, it would shut off the system automatically. The SSAC TH2B424 has a possibility of manual reset.