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 . <EOS>