A specimen receiver, comprising: a first receiver member including a first receiver port configured to receive a fluid flow including a material, the first receiver member defining a first portion of an interior of the specimen receiver; a specimen capture member in fluid communication with the first portion of the interior, the specimen capture member configured to obtain a sample of a material from the fluid flow, the specimen capture member disposed between the first portion of the interior and a second portion of the interior, the specimen capture member configured to filter the fluid flow to obtain the sample of the material; a second receiver member configured to be coupled to the first receiver member, the second receiver member defining the second portion of the interior of the specimen receiver, the second portion downstream of the first portion, the second receiver member including a second receiver port configured to be coupled to a vacuum source, wherein an inner diameter of the first receiver port is less than an inner diameter of the second receiver port to cause a pressure gradient in the direction of fluid flow from the first receiver port to the second receiver port to decrease, the pressure gradient greater than a first threshold sufficient to draw fluid through the specimen receiver and less than a second threshold above which the specimen capture member is expected to collapse into a receiver channel of the second receiver member; and console engagement members configured to reciprocally engage specimen engagement receiving members included on a bracket receiver surface and extending into a bracket body of a bracket assembly configured to hold the specimen receiver. a first receiver member including a first receiver port configured to receive a fluid flow including a material, the first receiver member defining a first portion of an interior of the specimen receiver; a specimen capture member in fluid communication with the first portion of the interior, the specimen capture member configured to obtain a sample of a material from the fluid flow, the specimen capture member disposed between the first portion of the interior and a second portion of the interior, the specimen capture member configured to filter the fluid flow to obtain the sample of the material; a second receiver member configured to be coupled to the first receiver member, the second receiver member defining the second portion of the interior of the specimen receiver, the second portion downstream of the first portion, the second receiver member including a second receiver port configured to be coupled to a vacuum source, wherein an inner diameter of the first receiver port is less than an inner diameter of the second receiver port to cause a pressure gradient in the direction of fluid flow from the first receiver port to the second receiver port to decrease, the pressure gradient greater than a first threshold sufficient to draw fluid through the specimen receiver and less than a second threshold above which the specimen capture member is expected to collapse into a receiver channel of the second receiver member; and console engagement members configured to reciprocally engage specimen engagement receiving members included on a bracket receiver surface and extending into a bracket body of a bracket assembly configured to hold the specimen receiver.