Set of Limiting Orifices

DLSPH Collection · Public Health

Accession Number: 2016.phlt.1.124.1-2


A flat blue plastic rectangular base holds five small circular metal pieces, each with a small hole at its centre of a particular size.

The set includes a metal ‘Millipore Aerosol Adapter’ resembling a hose fitting. Each orifice may be screwed into this adapter.

A paper instruction sheet has been taped to the reverse side of the plastic base.

Primary Materials: Plastic, Steel

Dimensions (cm):

Part 1: Length = 11.3, Width = 4.5, Height = 1; Part 2: Diameter = 1.7, Length = 6.


Each orifice permits a particular volume of air to enter of sampling instrument through a Millipore Aerosol Analysis Holder or Aerosol Adapter.

It is part of an apparatus used to take air samples.

Condition: Very good.

Manufacturer: Millipore Filter Corporation