Hach-Lange SI792(x) E HACH GLI 3700 series SI792(x) T 7MA2200 and 8398 series User Manual - Manual (Page 18)

Installation
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3.1 Hazardous location installation
Before installation, review the applicable Hazardous Location Control
Drawings or ATEX EC-Type Examination certificate and safety
information included with the instrument and on the provided
documentation CD. Follow all regulations specified for the installation
location.
Refer to the documentation CD for manuals provided in other
languages.
3.1.1 ATEX safety information
Refer to Appendix D for safety information on the use of the
electrodeless sensors.