Linear drives as linear cylinders are composed of an electric drive head and a linear unit. The linear unit is designed in such a way that you can also accommodate drive heads in the flameproof housing. For the Linearis units, a hazard assessment is available which confirms the safe use in explosive areas. The CL-H (classic actuator) is approved for use in potentially explosive atmospheres of zone 1 in combination with the pressure-resistant encapsulated drive heads.