The ALN-EN incorporates Hochikis newest High Performance Chamber Technology removing the need to use Ionisation Smoke Sensors in the majority of applications. This also allows the sensor threshold level to be increased, thereby improving the signal to noise ratio and reducing susceptibility to false alarms. · · · Removable, High Performance chamber · · Twin LEDs allow 360° viewing green when polling, amber when isolating, red in fire · · Locking mechanism (sensor to base) · · Variable sensitivity · · Electronically addressed · · Pulsing/non-pulsing controlled from panel · · Approved by LPCB & VdS · · SIL Level 2 approved variants available