NRCS负责认证颗粒过滤半面罩，也称为防尘口罩或一次性防尘口罩，如KN95。此类过滤半面罩应符合呼吸防护设备强制性规范（VC8072：2011）中规定的最低安全要求，因此，必须由NRCS批准和认证。南非防尘口罩标准是SANS 50149 (FFP1, FFP2, FFP3)，但是南非SABS实验室不具备该标准的全套测试能力。
另外，相关口罩或其他防疫物资出口到南非市场除了申请NRCS签发的LOA（Letter Of Authority），还需要Sales Permit证书方可在南非市场销售。
西测国际认证检测中心在南非设有分公司，可以为中国口罩企业申请南非认证提供当地代理人服务（Authorized Representative）。以下是Authorized Representative的要求：
“authorised representative” means any natural person, resident in the Republic of South Africa, who
a) has the written mandate to represent a manufacturer, importer, distributor, wholesaler, retailer or service provider in the Republic;
b) acts on behalf of a manufacturer, importer, distributor, wholesaler, retailer or service provider for specified tasks with regard to the latter’s obligations and in whose name the manufacturer licence, distributor licence, wholesaler licence and or certificate of registration is issued; and
c) is responsible for all aspects of the medical device or IVD, including performance, quality, safety and compliance with conditions of registration, clinical trials or clinical investigations;
