Encapsulated microprocessor-based photocell designed for classified areas with the presence of flammable vapors and gases; its operation switches according to variations in incident light. The photocell has a major differentiator. In addition to its modern and efficient design, its electronic circuit was designed with a protection system against transient flashes. Applicable in Zone 1 and 2, for groups IIA, IIB, and IIC. Operating temperature: withstands variation from -40°C to 80°C. Certified according to Inmetro (Brazil), ATEX (European Community), IECEx (International). Available with M20x1.5 connection threads (PM002 and PM003) and M22x1.5 or 3/4″ NPSM (PM001).