Donadon NAM 03/HT alarm system is recommended for installation with Donadon SDD rupture discs.
NAM 03/HT Alarm System is a proximity sensor installed in the disc holder downstream the disc in order to detect the bursting of the disc.
This magnetic field sensor is activated by changes in magnetic field. A target with a permanent magnetic is supplied with the disc; when the disc bursts the magnet is displaced and the sensor activated.
Replacement discs are supplied with a new target.
NAM 03/HT is an intrinsic protection device certified ATEX II 2GD Eex m IIC T4/T6 and ATEX II 1GD Eex ia IIC T3/T6and therefore may be used in locations where potentially explosive atmospheres with gas, vapors or mist are continually present (locations classified zone 0; 20 and 1; 21 and 2; 22 by European Directive 94/9/CE (ATEX)).
NAM 03/HT is normally supplied with 2m bipolar cable IP 67.
The cables of the alarm system must be connected to the plant’s safety system through an intrinsic safety barrier adequate to the location.
