Hochiki DCD-AE3 Rate of Rise Heat DetectorHochiki DCD AE3 Conventional Combined Rate of Rise & Fixed Temperature Heat Detector (60C) Hochiki DCD AE3 is a Rate of Rise Heat Detector with a 60C fixed temperature element using a thermistor and linearising circuit to provide an accurate linear response Heat Detector. DCD AE3 is ideal for use where medium ambient temperatures exist, such as drying rooms or where Smoke Detectors are unsuitable because of the presence of steam or cooking fumes such