Description Hochiki Analogue Multi-Heat sensor Detector with LED ATJ-EN has a heat element with variable temperature and one that rises at a constant rate. Both elements are controlled by the Control Panel. This allows either element to work or both simultaneously. The sensor polling LEDs can also be controlled via the Control Panel (pulsing/non-pulsing). Multi-Heat Detector Features: Analogue Multi-Heat Detector Compatible with Control Panel Sensor polling LEDs