Central gas detection system with 8 zones to which it is possible to connect a toxic or explosive gas detector of proportional type 4-20mA. LCD display with 4 lines of 16 characters, membrane keyboard with protected access via mechanical key, 6 programmable relay outputs for pre-alarm, alarm and general fault with threshold management. The system allows to have up to 22 programmable outputs through an optional board (NFG-16R). Equipped with LED signaling for pre-alarm 1, pre-alarm 2, alarm, sensor disabled and fault. ATEX and SIL1 certified.