An air sampling device comprising: a housing comprising an air inlet and an air outle; an air pump in gaseous communication with the air inlet and air outlet; a carrier having a first face and a second opposing face, the carrier comprising a plurality of receptacles disposed in a circumferential pattern, wherein each receptacle is configured to receive a sample tube, and wherein each receptacle comprises a first end and an opposing second enc; a first plate disposed adjacent to and substantially covering the first face of the carrier, wherein the first plate comprises a first sample opening; a second plate disposed adjacent to and substantially covering the second face of the carrier, wherein the second plate comprises a second sample opening that is circumferentially aligned with the first sample opening relative to the receptacles of the carrier, wherein the circumferential position of the first and second sample openings defines a circumferential sample position, wherein the carrier is rotatable relative to the first and second plates or the first and second plates are rotatable relative to the carrier to intermittently index a receptacle into the circumferential sample position; a gaseous path that extends from the air inlet, through the first sample opening, through the receptacle in the circumferential sample position, through the second sample opening, through the air pump, and out the air outlet; and a first seal disposed between the first end of each receptacle and the first plate at the circumferential sample position, a plurality of second seals disposed in the first end of each receptacle, and a third seal disposed between the second end of each receptacle and the second plate at the circumferential sample position. a housing comprising an air inlet and an air outle; an air pump in gaseous communication with the air inlet and air outlet; a carrier having a first face and a second opposing face, the carrier comprising a plurality of receptacles disposed in a circumferential pattern, wherein each receptacle is configured to receive a sample tube, and wherein each receptacle comprises a first end and an opposing second enc; a first plate disposed adjacent to and substantially covering the first face of the carrier, wherein the first plate comprises a first sample opening; a second plate disposed adjacent to and substantially covering the second face of the carrier, wherein the second plate comprises a second sample opening that is circumferentially aligned with the first sample opening relative to the receptacles of the carrier, wherein the circumferential position of the first and second sample openings defines a circumferential sample position, wherein the carrier is rotatable relative to the first and second plates or the first and second plates are rotatable relative to the carrier to intermittently index a receptacle into the circumferential sample position; a gaseous path that extends from the air inlet, through the first sample opening, through the receptacle in the circumferential sample position, through the second sample opening, through the air pump, and out the air outlet; and a first seal disposed between the first end of each receptacle and the first plate at the circumferential sample position, a plurality of second seals disposed in the first end of each receptacle, and a third seal disposed between the second end of each receptacle and the second plate at the circumferential sample position.