Certification
PESO & CIMFR certified
Zone
Zone 1 & Zone 2
Ex rating
Ex d IIC T6
Power supply
24V DC / 230V AC / 415V AC
Output
105–115 dB at 1 metre
Enclosure
Copper-free cast aluminium, IP66
PESO and CIMFR certified flameproof sirens and hooters for Zone 1 and Zone 2 hazardous areas. Explosion-proof Ex-d enclosure rated for use in the presence of flammable gases and vapours.
A flameproof (Ex-d) enclosure does not prevent gas from entering the device. It is designed so that if an internal spark ignites gas inside the enclosure, the explosion is contained — the flame cannot escape to ignite the surrounding atmosphere. This is achieved through certified flame-path gaps, robust cast construction, and pressure-tested joints.
Standard motor sirens have carbon brushes that spark continuously during normal operation. Standard electronic sirens have switching circuits, relays, and transformers that can produce arcs or excessive surface temperature. In an atmosphere containing flammable gas or vapour, either of these can trigger an explosion.
Installing a standard (non-certified) siren in a hazardous area is not just a compliance violation — it is a direct safety hazard that can cause the exact disaster the siren exists to warn against.
Flameproof equipment is certified for specific gas groups and temperature classes. Gas Group IIA covers propane-type gases, IIB covers ethylene-type, IIC covers hydrogen — each requiring progressively tighter flame-path tolerances. Temperature class (T1–T6) defines the maximum surface temperature the equipment can reach, ensuring it stays below the auto-ignition temperature of the gases present.
Hazardous areas are classified by how often and how long an explosive atmosphere is likely to be present.
Explosive atmosphere present continuously or for long periods. Inside storage tanks, process vessels. Requires highest protection level (Ex-ia, intrinsically safe).
Explosive atmosphere likely to occur during normal operation. Areas around loading bays, vent points, pump stations. Flameproof (Ex-d) equipment is suitable.
Explosive atmosphere unlikely under normal operation, and if it occurs, only briefly. Wider perimeter areas around process units. Flameproof (Ex-d) equipment is suitable and commonly specified.
Our flameproof sirens are certified for Zone 1 and Zone 2 applications. Always confirm your facility's hazardous area classification drawing before ordering — this is typically prepared by your safety consultant or EPC contractor.
Petroleum and Explosives Safety Organisation certification — mandatory statutory approval for use in Indian petroleum and gas facilities.
Central Institute of Mining and Fuel Research testing — verifies flameproof enclosure integrity against Indian standard test protocols.
Standard flameproof model specifications. Custom configurations available for specific gas group and temperature class requirements.
| Parameter | Specification |
|---|---|
| Enclosure Rating | Ex-d (Flameproof) |
| Zone Suitability | Zone 1 & Zone 2 |
| Gas Group | IIA / IIB (confirm at order) |
| Temperature Class | T4 / T5 / T6 (confirm at order) |
| Certification | PESO, CIMFR tested |
| Enclosure Material | Cast aluminium / cast iron |
| Sound Output | 90–120 dB depending on model |
| Power Supply | 24V DC / 230V AC / 415V AC (motor & electronic variants) |
| Cable Entry | Flameproof certified gland |
| Protection Rating | IP65 / IP66 |
| Earthing | External earth terminal mandatory |
| Warranty | 12 months from supply |
Share your zone classification, gas group, and cable entry size. We confirm the Ex d variant and supply test certificates.