Chapter 2│ Description
This controller is intended for the continuous measurement and control of the
gases present in the atmosphere.
The Surveyor 4B is intended for indoor use only and shall be installed in
premises without explosive atmospheres.
The central controller is intended for use in areas that meet the Class II
requirements for overvoltage and degree of pollution 2. Surveyor 4B is Class
II equipment.
Surveyor 4B is equipped with a small "NORMAL" box (58 x 105 x 90 mm). It
can be snap-fastened onto a standard symmetrical DIN rail and should
imperatively be integrated in a closed electrical equipment cabinet.
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