What type of heat detector is designed to overcome the phenomenon of thermal lag?

Rate Compensation heat detectors are specifically engineered to address the issue of thermal lag, which is the delay in the response of a heat detector to a change in temperature. In scenarios where the temperature rises rapidly, these detectors can account for both the current temperature as well as the speed of the temperature increase. By evaluating the rate at which the temperature changes, they can provide a quicker and more reliable response in detecting potential fires, thereby improving safety and effectiveness.

This design allows the rate compensation heat detectors to be more sensitive to actual fire conditions while reducing false alarms caused by slow temperature changes, such as those caused by environmental factors. Spot-type detectors and traditional heat detectors may not respond as quickly or accurately to rapidly changing temperatures, making them less effective in overcoming thermal lag. Rate of rise detectors focus solely on the rate of increase in temperature but do not incorporate the overall temperature threshold that rate compensation detectors utilize.