Testing laboratory for adsorbents and breathing apparatus filters STS 022
Our laboratory is responsible for testing gas filters and evaluating the characterisation of adsorbents (chiefly activated carbon). For many years we have been responsible for testing military protective breathing apparatus. Now civilian clients and industry can also avail of our specialist expertise in this field.
Overview of tests and services provided by testing laboratory STS 022
Testing the soak time of NBC filters and activated carbon to protect against toxic gases used for military purposes
Only activated carbon may be used in NBC protective filters, as tests have confirmed its protective properties. On safety and cost grounds, the filters must be filled in a laboratory setting. This means that tests on activated carbon for use in large filters (collective protection) are first carried out in appropriately scaled test tubes. However, tests can be carried out directly on small filters used in individual breathing apparatus. All tests are carried out by the Collective Protection Group.
Physical and technical characteristics of activated carbon
Activated carbon must first display a range of physical and chemical properties before it can be used in protective breathing apparatus. A number of tests are carried out: granulation (grain shape and size),drag, abrasion resistance, dust concentration, moisture (moisture-related ageing), ammoniac desorption and ignition temperature.
EN 14387-compliant tests of filters for protection against industrial pollutants
Standardised measurements are taken for all categories of filters and test substances, including HCN and Hg.
Chemical analysis of impregnated activated carbon
The Environmental Analyses group (accredited testing laboratory STS 101) is responsible for tests which determine the presence of silver, chrome, copper, molybdenum and zinc, as well as chromate, ammonia and ash content.
Accredited testing procedures
The scope of the accreditation is defined by STS classifications
As a general rule, the tests are charged at cost price. For all queries, please contact a member of staff (see below).
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| Markus Gurtner | |
| Head STS 022 |