The HTY-302 Microbial Limit Tester is a specialized device designed according to pharmacopeia requirements. It is equipped with three pump heads and uses a high-performance vacuum pump in conjunction with a waste liquid bottle. By using different pump heads with funnels or canisters, it forms a complete membrane-filtration setup. During testing, the sample is filtered to retain microorganisms on the membrane, which are then cultured into visible colonies for counting to determine microbial levels.