Air sampling unit with suction, with modular structure, arranged to house 1 or 2 detection modules, with which it is possible to monitor 1 zone, with 1 or 2 independent suction channels. Suction network: ABS piping Ø25mm, maximum length 300m per suction channel. Sensitivity classes: A, B, C. Programmable suction speed. Each suction channel is equipped with a signalling interface consisting of: 3 leds providing functional information and 2 relay outputs in free exchange, for the implementation of the Alarm and Fault signals. The configuration of the suction unit is completed with the synoptic front label. Power supply voltage 24V DC. Maximum absorption: 1 detection module 220mA, 2 detection modules 250mA. Degree of protection IP20 (IP52 with optional kit). Operating temperature -20°C...+60C°. EN 54-20. Approval certificate: VdS G 202064.