Digital fixed-temperature cable
Two conductors contact when heat causes the temperature-rated insulation to change state, creating an alarm condition.
Continuous heat detection along extended and difficult hazards
Linear Heat Detection Systems in Mumbai & Across India
Hazard survey, technology selection, cable routing, supply, installation, fire-alarm integration, testing and maintenance.
What is a linear heat detection system?
A linear heat detection system uses a sensing cable, tube or fibre installed along a hazard to detect abnormal heat at any point on its protected length and report an alarm or temperature event to monitoring equipment.
Unlike a point detector that monitors one location, linear sensing follows the hazard along cable trays, conveyors, tunnels, tank rims or equipment boundaries. It is especially useful where conditions are dusty, wet, corrosive, inaccessible or exposed to vibration and airflow.
Reliance Fire Protection Systems supports site surveys, product and temperature-rating selection, routing design, supply, installation, fire-alarm integration, testing, commissioning and maintenance from Mumbai for projects across India.
Types of Linear Heat Detection
Analogue or recoverable cable
The cable's electrical characteristics vary with temperature, allowing the controller to evaluate heat over the protected length.
Fibre-optic temperature sensing
Optical interrogation measures temperature along long routes and can provide distance-based alarm location and thermal profiles.
Pneumatic sensing
A pressurised sensing tube responds to temperature-related pressure changes and connects to suitable monitoring equipment.
Addressable zone systems
Interface or controller arrangements divide long hazards into identifiable zones for clearer alarm location and maintenance.
Application-specific jackets
Cable jackets and construction are selected for chemicals, UV exposure, moisture, abrasion, temperature and classified locations.
Where Linear Heat Detection Is Used
Cable trays and tunnels
Continuous coverage along power, control and communication cables where fire can spread beyond a point detector.
Conveyor belts
Sensing near bearings, drives, return rollers and conveyor routes for overheating, friction and material-fire hazards.
Road and rail tunnels
Long-distance heat detection and zone or location information for tunnel fire-alarm and incident-response systems.
Storage tanks and rim seals
Detection around suitable tank perimeters, floating-roof rim seals and associated hydrocarbon hazards.
Warehouses and cold storage
Protection for racks, ceilings, freezer spaces and difficult environments where point detector access is limited.
Industrial and transport equipment
Detection for machinery, escalators, car parks, ducts, galleries and application-specific mobile or fixed equipment.
How a Linear Heat Detection System Works
Selection note: Alarm temperature, ambient operating range, spacing, coverage, cable jacket, zoning, supports and interfaces must match the specific hazard and manufacturer requirements. Linear heat detection does not replace a complete fire-risk and system-design assessment.
Design, Installation and Maintenance
Hazard and ambient review
Confirm normal and maximum temperatures, fire growth, airflow, contamination, mechanical exposure and access.
Technology and rating selection
Select sensing principle, alarm temperature, cable jacket, controller and location capability for the application.
Routing and zoning
Coordinate cable position, spacing, zones, branches, joints, interface points and accessible test locations.
Supports and protection
Use approved clips and mounting methods while respecting bend radius, tension, abrasion and environmental exposure.
Testing and integration
Verify continuity, insulation, end-of-line supervision, alarm response, zone identification and fire-panel interfaces.
Preventive maintenance
Inspect cable condition, supports, joints, controllers, fault monitoring, test facilities and changes to the protected hazard.
Linear Heat Detection Systems Across India
Survey, design coordination, equipment supply, installation, testing and service support are available across all Indian states and union territories, subject to project scope, approvals and product availability.
Andhra PradeshArunachal PradeshAssamBiharChhattisgarhGoaGujaratHaryanaHimachal PradeshJharkhandKarnatakaKeralaMadhya PradeshMaharashtraManipurMeghalayaMizoramNagalandOdishaPunjabRajasthanSikkimTamil NaduTelanganaTripuraUttar PradeshUttarakhandWest BengalAndaman and Nicobar IslandsChandigarhDadra and Nagar Haveli and Daman and DiuDelhiJammu and KashmirLadakhLakshadweepPuducherry
Key service locations: Mumbai, Navi Mumbai, Thane, Pune, Nagpur, Nashik, Ahmedabad, Surat, Vadodara, Bengaluru, Hyderabad, Chennai, Coimbatore, Kochi, Delhi NCR, Noida, Gurugram, Jaipur, Indore, Bhopal, Raipur, Kolkata and project locations nationwide.
Linear Heat Detection FAQs
What is a linear heat detection system?
It uses a sensing cable, tube or fibre along a hazard to detect abnormal heat at any point on its protected length.
How does linear heat detection cable work?
The method depends on the technology: digital state change, analogue electrical change, pneumatic pressure change or fibre-optic temperature measurement.
Where is linear heat detection used?
Applications include cable trays, tunnels, conveyors, warehouses, cold storage, tank rims, car parks and harsh industrial areas.
Can linear heat detection locate the fire?
Some systems identify an alarm zone, while suitable addressable or fibre-optic systems can report a more precise distance or profile.
Is linear heat detection reusable after an alarm?
Some technologies reset when undamaged, while many digital fixed-temperature cables require replacement of the operated section.
Does linear heat detection require maintenance?
Yes. Cable, supports, joints, end-of-line devices, controllers, circuits and alarm functions require planned inspection and testing.
Do you provide linear heat detection systems across India?
Yes. We support surveys, design coordination, supply, installation, testing, commissioning and maintenance from Mumbai across India.
Related Fire Detection Solutions
Request a Linear Heat Detection Assessment
Share the hazard type, route length, ambient and alarm temperatures, environmental exposure, drawings, zone requirements, integration and project location.
Call +91 96999 90424 | sales@relifire.com | Contact Reliance Fire Protection Systems