It is in a housing made of aluminum or stainless steel with a cable connection, which not only offers robustness and reliability, but also unrestricted use in potentially explosive areas as devices of ATEX group II, cat. 2, gas up to IIC and dust, as well as group dust IIIC. The certification applies to: ATEX, IEC-Ex, North America Class 1/2 Div. 2 and EAC-Ex. Another area of ​​application is the oil and gas industry. The vapors and gases that occur are explosive and any assemblies that come into contact with them must be suitable. If, for example, loading cranes, which are usually equipped with plenty of sensors - e.g. rotary encoders - are used in ATEX zone 1, the new TRT78 / S3-ATEX rotary encoder with PROFIsafe interface can be used.