Why risky areas need a flameproof smoke detector
A flameproof smoke detector is selected for facilities where the fire risk is higher than normal. Combustible stores, volatile chemicals and fuel handling areas can hold vapour that an ordinary electronic detector might ignite. The flameproof enclosure contains any internal spark, so the detector can watch for smoke without adding to the hazard.
How it senses smoke
The detector is a photoelectric type. It uses an infrared emitting diode (IRED), and when smoke enters the sensing chamber the particles scatter the light onto a photovoltaic sensing cell. When the smoke level reaches the alarm threshold, the smoke alarm circuit activates, and the fire alarm panel that monitors the detector sounds the hooters.
Where we fit flameproof smoke detectors
These detectors are used in areas with higher fire risks, including external environments. The detector must be selected to suit the location and the nature of the fire risk:
- Combustible storage facilities
- Volatile chemical storage
- Chemical processing plants
- Petroleum refineries
- Turbine enclosures
Checks before you buy
A flameproof label is not enough. Ask for the approval certificate and confirm:
- The approval, such as PESO, and the gas group and zone it covers
- The enclosure rating for dust and water, for outdoor or washdown areas
- Cable entry type and the matching certified glands
- Compatibility with your panel and its detector circuit
What you get from Essatech
We supply and install flameproof smoke detectors in Hyderabad and Visakhapatnam, with installation planned according to your building's fire risk:
- A site visit to review the hazards and the existing alarm
- Detector type and number chosen for each area
- Installation with certified glands and sealing
- Connection to your panel and a smoke test at handover
- Service visits that check each detector and its enclosure
Part of a matched hazardous-area system
Detectors work with the other devices in the same area. We supply flameproof MCPs for the manual trigger and flameproof hooters for the warning, and for fires that start with a flame and little smoke we add a flame detector. Essatech also deals in other smoke detector types and smoke sensors, including optical, wired and wireless, plus explosion-proof versions.
Testing and upkeep
Hazardous-area detectors must stay in the condition they were approved in. At each service visit we test every detector with approved smoke test equipment, confirm the alarm on the panel, check that the enclosure is intact and the cover bolts are complete, and look at the glands and cable. Dust and chemical deposits on the sensing chamber cause drift and false alarms, so detectors are cleaned or replaced on a schedule that suits the site.
For builders, architects, MEP consultants, corporates, industries, hospitals and defence
Industries with solvents, fuels and chemicals are the main users. Builders and architects of process plants should supply the hazardous area classification early, so detectors, enclosures and cable routes are selected together. Commercial building owners with fuel or generator rooms, and hospital owners with chemical or fuel stores, need approved detectors in those rooms even if the rest of the building uses ordinary ones. MEP consultants can pass us the hazardous area drawings and we match detectors and enclosures to the zones. Corporates need them in fuel and chemical stores. Defence sites, including Navy and Army stores and workshops with hazardous materials, need approved detectors, and we quote within their vendor-registration rules.
What decides the cost
Flameproof detectors cost more than ordinary ones. The total depends on:
- Approval level, gas group and zone rating
- The number of detectors, which follows area and ceiling height
- Glands, armoured cable and installation effort
- Panel type and detector circuit compatibility
What to send us for a quote
Send these through the quote page or on WhatsApp:
- Plant layout or a sketch of the hazardous areas
- Hazardous area classification, if you know it
- Make and model of your control panel, if any
- Your location and the date you need the work done
Hazardous-area detection in Hyderabad and Visakhapatnam
We work with process and storage sites in Jeedimetla, Patancheru and Bachupally in Hyderabad, and Gajuwaka, Autonagar and Parawada in Visakhapatnam. Every site gets a visit first, because the right detector, number and position depend on the process, the vapours present and the ventilation. Contact our offices to book a site visit.
Talk to our local team
Share your location, type of building and what you need. We will suggest the right equipment and explain installation and maintenance.


