Biotechnology. Equipment. Guidance on testing procedures for leaktightness Biotechnology, Production equipment, Leak tests, Microorganisms, Occupational safety, Environment (working), Biological hazards, Equipment safety, Safety measures, Selection, Pressure testing, Tracer methods, Sampling methods, Gases, Liquids, Fluids, Aerosols, Sonic testing, Ultrasonic testing, Filters, Visual inspection (testing)