5
Directives and standards
ATEX (Atmosphère Explosible)
The level electrodes NRG 10-52 and NRG 16-52 are simple items of electrical equipment as specified
in EN 60079-11 section 5.7. According to the European Directive 2014/34/EU the equipment must be
equipped with approved Zener barriers if used in potentially explosive areas. Applicable in Ex zones 1, 2
(1999/92/EG). The equipment does not bear an Ex marking.
VdTÜV Bulletin “Wasserstand 100” (= Water Level 100)
The level electrode NRG 10-52 / NRG 16-52 in conjunction with the following level switches is type ap-
proved according to VdTÜV Bulletin “Wasserstand 100”: NRS 1-52, NRS 1-53, NRS 1-54 and NRS 1-55
or NRS 1-1, NRS 1-2, NRS 1-3 and NRS 1-5.
The VdTÜV Bulletin “Wasserstand (= Water Level) 100” specifies the requirements made on water level
control and limiting equipment for boilers.
Note on the Declaration of Conformity / Declaration by the Manufacturer
For details on the conformity of our equipment according to the European Directives see our Declaration
of Conformity or our Declaration of Manufacturer.
The current Declaration of Conformity / Declaration of Manufacturer are available in the Internet under
www.gestra.com/documents or can be requested from us.
