HEAT DETECTOR HONG CHANG HC-306A hongchang ROR RATE OF RISE DC-12V-30V Features: - With dual LED, easy to observe state of detector. - The dual LED light up constantly when the detector alarms. - With large metal surface to expose the air to sense the temperature. Voltage: 24VDC System from Panel Standby Current: 0μA Alarm Current: 30mA Suitable Temperature: -15~50° C Suitable Humidity: 0~95% RH Dimension: 103mm x 43mm Material: Fire-resisting ABS material Joint Contact: Copper (zinc-plated)