Toshniwal Industries Digital Linear Heat Detection Cable LHDC

Digital Linear Heat Detection Cable LHDC

LHDC

Digital linear heat detection cable LHDC is used for continuous heat and fire-risk detection along cable routes, conveyors, tunnels, cabinets and harsh industrial areas. It triggers alarm when the cable reaches a fixed alarm temperature. Also, it supports early detection of overheating where point detectors may not be practical due to dust, airflow, access difficulty or harsh environmental conditions. As a result, it helps improve fire-risk monitoring near the actual hazard path.

  • Fixed-temperature alarm
  • Long-route heat detection
  • Harsh-area monitoring
  • UV / chemical resistance
  • Armour option available
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Alarm temperature guidance

Route length review

Cable protection support

Fire panel interface help

Installation backup

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Data Sheet
Application Note
Product Manual
  • Digital linear heat detection cable for industrial fire safety
  • Designed for early detection of overheating and fire-risk conditions
  • Fixed alarm trigger temperature
  • Alarm temperature options: 70°C, 90°C and 180°C
  • Suitable for harsh environmental conditions
  • UV and chemical-resistant outer sheath
  • Stainless-steel outer armour option available
  • Can be installed close to the risk area
  • Useful where point detectors may be unsuitable or costly
  • Hotspot alarm detection on small sections of the cable route
  • Distance identification in metres possible with suitable controller/module arrangement
  • Compatible with many existing zone monitors and control equipment
  • Intrinsically safe configurable for hazardous areas with suitable interface arrangement
  • SIL 2 approved when used with specified modules
  • UL listed, with 180°C listing status subject to datasheet note
  • Suitable for cable tunnels, conveyors, switchgear cabinets, tank rim seals, cold rooms and industrial plant areas
  • Cable tunnel fire detection
  • Cable duct and mezzanine monitoring
  • Cable tray fire-risk monitoring
  • Conveyor belt fire detection
  • Coal, wood and sulphur conveyor protection
  • Petrochemical storage tank rim seal monitoring
  • Electrical control and switchgear cabinet protection
  • Road and rail tunnel carriageways
  • Cold rooms and refrigerated stores
  • Warehouse high-rise pallet racking
  • Computer room underfloor cable voids
  • Paint shops, spray booths and climate chambers
  • Oil rigs and offshore platforms
  • Product lines, flanges, valves and pumps
  • Areas with harsh environment or difficult maintenance access
  • Product Type: Digital Linear Heat Detection Cable
  • Model / Short Name: LHDC
  • Cable Construction: Twisted pair twin-core cable
  • Number of Cores: 2
  • Core Material: Tinned copper-coated spring steel
  • Insulation: Special heat-reactive polymer insulation
  • Alarm Temperature Options: 70°C, 90°C, 180°C
  • Part Numbers: 700-070, 700-090, 700-180 standard cable options
  • Armoured Part Numbers: 700-071, 700-091, 700-181 stainless steel armour options
  • Maximum Ambient Temperature: 45°C for 70°C cable, 70°C for 90°C cable, 150°C for 180°C cable
  • Minimum Operating Temperature: -65°C
  • Minimum Installation Temperature: -40°C
  • Outer Sheath: Nylon for 70°C and 90°C cable, Hytrel for 180°C cable
  • Sheath Colour: Black for 70°C and 90°C, violet for 180°C
  • Armour Option: Stainless steel armour available
  • Voltage Rating: 150 VDC
  • Dielectric Test: 500 VDC
  • Outer Diameter: 4.0 mm ± 0.3 mm maximum
  • Armoured Cable Diameter: 4.5 mm ± 0.3 mm
  • Standard Cable Reel: 1 km reel, approx. 21 kg
  • Armoured Cable Reel: 500 m reel, approx. 19 kg
  • Approval: UL listed, with 180°C status subject to datasheet note
  • SIL 2 Support: When used with specified LDM-519-DIM or LDM-519-DDL modules
  • Compatible Controllers / Interfaces: LDM-519-DDL, LDM-519-DIM and related termination accessories as per system design
  • Typical Interface: Fire alarm channel, address loop interface, end-of-line device or suitable controller arrangement

    Comprehensive Services Using This Product

    From installation to ongoing support, we’re with you every step of the way.

    Annual Maintenance Contract

    Reliable year-round equipment care and support.

    Annual Maintenance Contract
    Installation & Commissioning

    Seamless setup ensuring optimal system performance.

    Installation & Commissioning

    Industries Using This Product

    Our solutions are trusted by top industries to drive growth and improve operations.

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    Oil & Gas
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    Ensuring safe, reliable operations in oil and gas with precise monitoring and control.

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    Advanced monitoring systems for efficient steel production, ensuring product consistency and safety.

    What Customers Say About Us

    Trusted Engineering Support

    The team provided clear technical guidance and practical solutions. Execution was smooth and well coordinated throughout.

    Mr. Vivek NairGeneral Manager – Operations, Cement Industry
    Dependable Technical Partner

    Their approach was systematic and aligned with our plant needs. Overall experience with product and service has been positive.

    Ms. Kavita RaoSenior Manager – Maintenance, Steel Sector
    Application-Focused Solutions

    They understood our process conditions before recommending equipment. Support during installation was handled professionally.

    Mr. Rohan MehtaProject Lead – Power Plant
    Consistent Service Delivery

    Product performance has been stable in regular operations. The support team responds in a timely manner.

    Mr. Anil DeshmukhInstrumentation Head, Process Manufacturing

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    Frequently Asked Questions

    Digital linear heat detection cable is used to detect overheating or fire-risk conditions along cable routes, conveyors, tunnels, cabinets and other industrial areas where point detectors may not be practical.
    LHDC uses heat-reactive polymer insulation between two conductors. When the cable reaches its fixed alarm temperature, the insulation changes and allows the conductors to make contact, which sends an alarm signal to the monitoring equipment.
    The cable is available in 70°C, 90°C and 180°C alarm temperature options.
    Yes. Stainless-steel armour options are available for applications where mechanical protection is required.
    The cable can be configured for intrinsically safe hazardous-area applications when used with suitable barriers and interface equipment. Final selection should be checked against the project requirement.
    Yes. It is suitable for cable tunnels, cable trays, cable galleries, conveyor systems and similar long-route industrial fire detection applications.
    Users should check normal ambient temperature, required alarm temperature, route length, mechanical exposure, chemical exposure, fire alarm interface and maintenance access before selection.

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