Thermal Detector:

S.S.SON CONTROLS THERMAL DETECTOR are the heart of many Fire Protection Systems. These highly reliable devices have been a standard of the industry for over 45 years. Many hundreds of thousands of these units are now in use controlling the release of fire suppression agents such as FM200, CO2, water, foam, wet or dry chemicals. In some systems the device is used as an ALARM device. to sense overheat or fire, and alert personnel. In other systems, it is used as a RELEASE device, to sense fire and actuate fire attack systems.

S.S.SON CONTROLS THERMAL DETECTOR  units have met with wide acceptance because they are designed with RATE COMPENSATION. This provides a unique advantage over both fixed temperature and rate-of-rise types of detectors because only the S.S.SON CONTROLS THERMAL DETECTOR unit accurately senses the surrounding air temperature regardless of the fire growth rate. At precisely the predetermined danger point, the system is activated.

Fixed temperature detectors must be completely heated to alarm temperature and therefore a disastrous lag in time may occur with a fast rate fire. Rate-of-rise devices, on the other hand, are triggered by the rate of increase in ambient temperature and are subject to false alarms caused by harmless, transient thermal gradients such as the rush of warm air from process ovens.

The secret of the unit's sensitivity is in the design. The outer shell is made of a rapidly expanding alloy which closely follows changes in surrounding air temperature. The inner struts are made of a lower expanding alloy. Designed to resist thermal energy absorption and sealed inside the shell, the struts follow temperature changes more slowly.