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 811-1004-04 PM-4.0 Impactor Kit, Replacement for Models 810-10 Price on request 910-0802-04 Gilian 5000 Starter Kit UL ATEX, 120/240V, No Cord Price on request 811-9927-08 Cyclone, 37mm Filter Screen Price on request