Halma plc is a United Kingdom-based life-saving technology company. The Company operates through four segments: Process Safety, Infrastructure Safety, Environmental & Analysis and Medical. The Process Safety segment offers products, such as specialized interlocks that control critical processes safely; instruments that detect flammable and hazardous gases; and explosion protection and corrosion monitoring systems. The Infrastructure Safety segment offers products, such as fire detection systems, specialist fire suppression systems, elevator safety systems and people and vehicle flow technologies. The Environmental & Analysis segment offers products, such as opto-electronic technology and sensors, flow gap measurement instruments and gas conditioning products, and solutions for environmental data recording, water quality testing and ultraviolet (UV) water treatment. The Medical segment offers products, such as critical fluidic components, laboratory devices and systems.