IS Conventional heat detector BS (Fixed threshold)
category II 1G Ex ia IIC T5 (T4 to Ta < 60°C). LPCB Cert. No. 010r
ORBIS IS (Intrinsically Safe) is a range of conventional detectors which have been especially designed and approved for use in inflammable atmospheres.
These products are certified BASEEFA (British Approval Service for Electrical Equipment in Flammable Atmospheres) in compliance with BSEN60079-0:2004, IEC60079-0:2004, EN5002:2002, EN/BSEN/ IEC60079-26:2004 Category II 1G Ex ia IIC T5 (T4 to Ta < 60°C).
The principles diagram (below) illustrates the wiring method required for IS addressable detectors and the accessories to utilize.