Model AP-20S Gas Detection Pump Kit Back Catalog number: 830-0001-01 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended GFPC525 Filter, 25mm, 5.0µm, Polycarbonate, Plain White, 1 Price on request 800275-2 Gilibrator-2 Deluxe Kit, with Printer 230V , Euro Price on request 810-0102-02 GilAir-5 Clock, with timer (ATEX), Pump only Price on request