Rupture disc alarm annunciator NAM 03/HT

Donadon magnetic NAM 03/HT rupture indicators are recommended for use with our rupture discs. The NAM 03/HT indicator is composed of: a magnetic proximity type sensor installed in the corresponding threaded housing downstream in the rupture disc holder to detect opening a target with a permanent magnet supplied with the disc When the disc opens the magnet is displaced and the sensor activates. Replacement discs are supplied with a new target. NAM 03/HT is an intrinsic safety device certified ATEX II 2GD Ex mb II T4/T6 Ex tD A21 IP67 T135°C/T85°C ATEX II 1GD Ex ia IIB T3/T6 Ex iaD 20 T200°C/T85°C It can therefore may be used in locations where potentially explosive atmospheres are continually present (classified zones 0, 20 and 1, 21 and 2, 22 according to European Directive 94/9/EC (ATEX)). NAM 03/HT is normally supplied with 2 metres of bipolar cable. The cables of the alarm system must be connected to the plant’s safety system through an adequate safety barrier. Ex ia barrier --> zone 0; 20; 1; 21; 2; 22 Ex ib barrier --> zone 1; 21; 2; 22 Storage temperature - From -40°C to +200°C in accordance with ATEX certification Material in contact with process fluid - Same as disc and disc holder Max switching voltage - 60 VDC Max switching current - 0,4 A Cable - 2 x 0.2 mm2,ø 3.4 mm, 200°C, Class C2 Degree of protection - IP 67