Directives and Standards
Pressure Equipment Directive (PED) 2014/68/EU
Water level limiters are safety accessories as defined in the
Pressure Equipment Directive (PED). The level switch NRS 1-50
in conjunction with level electrode NRG 1...-50 and NRG 16-36
is EU type approved according to EN 12952/EN 12953. These
Directives state, among other things, the requirements made
on limiting systems and equipment for steam boiler plants and
(pressurised) hotwater installations.
Functional Safety acc. to IEC 61508
The level switch NRS 1-50 is certified acc. to IEC 61508 only
if used in combination with level electrode NRG 1...-50. This
Directive describes the functional safety of safety-related
electrical/electronic/programmable electronic systems.