Zefon 25MMH-3A-LIP Housing, Cassette, 25Mm, 3 Pc, Asb Style W/50Mm Conductive Cowl W/Lip, Box Of 50

Just like our pre-loaded cassettes, these static conductive cassette housings feature a leak free design and are manufactured in-house to the same stringent quality standards.

The Conductive Black Polypropylene Cassette Housings are manufactured using a polypropylene that is carbon filled, making them conductive when grounded properly.

Two-piece standard-style housings:
Two-piece standard-style housings have 35% less surface area than a three-piece cassette. As a result, they work best in closed face sampling applications, where it is advantageous to minimize the amount of contaminant that clings to the wall of the housing via electrostatic force.

Three-piece standard-style housings:
Three-piece housings feature an additional ring, usually ½” in length, separating the inlet from the filter media. They offer improved flexibility over two-piece models as they are suitable for both open and closed face sampling applications, and compatible with aluminum cyclones which connect to the spacer ring. However, as noted above, more surface areas mean greater electrostatic force, so less contaminant gets to the filter membrane.

Four-piece standard-style housings:
Four-piece housings feature an additional two rings, usually ½” in length, separating the inlet from the filter media. They offer improved flexibility over two-piece models as they are suitable for both open and closed face sampling applications, and compatible with aluminum cyclones which connect to the spacer ring. The four-piece allows for a center filter placement to meet certain European standards and for the shoot-through FTIR cassette.

Asbestos-style cassettes:
The asbestos style cassettes get this name due to their unique shape of the cassette outlet, sometimes referred to as a “bell” shape and with the most popular use for this design is sampling for asbestos, hence the name “asbestos style”. Most asbestos sampling uses a 3-Piece design with a 2” long spacer ring which is known as a cowl due to its length. Other configurations are available including 2-Piece and models with a ½” spacer ring.