E2S has launched high-performance, intrinsically safe alarm horn sounders and combination devices with aluminium enclosures. The IS-D105 sounder and IS-DL105 combination device are approved to IECEx and ATEX standards for Zone 0 and the IP66 sealed marine grade aluminium enclosure is phosphated and powder coated, offering enhanced protection for on and offshore applications.
The powerful alarm horn produces up to 105 dB(A) at 1 metre with a choice of 49 alarm tones and 2 additional, remotely selectable, alarm stages. For specific applications, custom tone configurations and frequencies can be engineered. The sounder can be combined with an LED beacon featuring an array of 6 high-intensity LEDs.
The alarm sounder and LED beacon can be powered through a single Zener barrier or galvanic isolator. Alternatively, the audible and visual elements of the IS-DL105 combination model can be controlled individually. When cabled with a common power supply, the sounder features an alarm accept function. By closing a pair of external contacts such as a pushbutton switch, the operator may silence the alarm for set periods between 5 seconds and 2 hours. The LED beacon continues to flash at twice its normal frequency providing indication of an ongoing alarm condition. If after the pre-set time the alarm condition still exists the alarm horn will activate.