Linear Heat Detection
Mueller Cables' Linear Heat Detection Cable is built for tunnels, conveyors, cable trays and process plant where point detectors fall short.
Overview
The cable's heat-reactive core triggers the instant any point along its length reaches the rated temperature.
Cable state at rest - see the full mechanism below.
See it triggerShare your zone lengths, alarm-temperature and panel requirements - we'll help you specify the right cable.
Products
Our Linear Heat Detection Cable is our flagship fire-detection cable, alongside a general range of power, control and instrumentation cables.
Non-resettable digital LHDC/LHS cable with six alarm ratings from 68°C to 187°C, and distance-location capability.
View specifications Power & ControlPVC & XLPE mining and insulated cables, aerial bunched, PTFE and instrumentation cables, plus custom builds.
View the rangeFlagship Product
Non-Resettable Digital Linear Heat Detection Cable (LHS / LHDC)
| Alarm Temperature | Maximum Ambient Temp. | Minimum Operating Temp. |
|---|---|---|
| 68°C | To be confirmed | To be confirmed |
| 78°C | To be confirmed | To be confirmed |
| 88°C | To be confirmed | To be confirmed |
| 110°C | To be confirmed | To be confirmed |
| 138°C | To be confirmed | To be confirmed |
| 187°C | To be confirmed | To be confirmed |
| Parameter | Specification |
|---|---|
| Number of cores | 2 |
| Voltage rating | 150 Vdc |
| Outer diameter | 4.0 mm ± 0.5 mm |
| Standard supply length | 1500 m ± 0.5% |
| Conductor type | Trimetallic, twisted pair |
| Insulation | Heat-reactive polymer (non-resettable) |
| Resettable | No - the affected section is replaced after activation |
| Feature | Benefit |
|---|---|
| Heat-sensitive polymer insulation | Triggers precisely at the rated alarm temperature |
| Industrial-grade outer jacket | Withstands chemicals, moisture and abrasion |
| Continuous linear coverage | Detects hot spots anywhere along the run, not just at fixed points |
| Compatible with suppression systems | Integrates with alarm panels and extinguishing systems via an EOL unit |
| Distance-location capability | Pinpoints the hot spot's location when paired with a digital interface |
Product Range
Alongside its Linear Heat Detection Cable, Mueller Cables manufactures and supplies a general range of power, control and instrumentation cables built to Indian Standard specifications.
| Cable type | Standard / grade |
|---|---|
| PVC Mining Cables | Up to 6.6 kV grade, as per IS 1554(2)/88 |
| XLPE Mining Cables | Industry-standard specification |
| PVC Insulated Cables | As per IS 1554(1)/88 |
| XLPE Insulated Cables | As per IS 7098/1/88 |
| Aerial Bunched Cables | As per IS 14255 |
| Teflon (PTFE) Cables | High-temperature-resistant construction |
| Instrumentation Cables | For precision measurement and control systems |
| Customised Cables | Built for import substitution and project-specific requirements |
Detailed conductor sizes, core counts and voltage grades are being compiled - request the specification sheet for the type you need.
Applications
Our Linear Heat Detection Cable is specified wherever a fire or overheat risk runs along a length - a tray, a conveyor, a tunnel - rather than sitting at one fixed point.
How It Works
Click a stage to see how the cable behaves from standby through to alarm.
The heat-reactive polymer keeps the twin cores separated. The circuit reads as a closed loop with no fault - the system is armed and monitoring.
As the cable surface reaches its rated alarm temperature, the insulating polymer softens at that exact point along the run.
The two cores make contact and send a signal to the control panel - with a distance interface, the panel reports how far along the cable the hot spot sits.
Two ways to detect heat - one covers a length, the other only covers itself.
Coverage only at fixed points - a gap between sensors is a blind spot.
Continuous coverage along the entire run - no gaps, and the hot spot's location is reported.
About Us
Company history, manufacturing capacity and certifications will be added once confirmed by Mueller Cables - unverified claims aren't published here.
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Mueller Cables (P) Ltd.FAQ
It's used for early heat sensing in environments prone to overheating or fire hazards.
No. Once activated, the affected section must be replaced.
Yes, when sourced from quality cable manufacturers with weather-resistant materials.
They offer linear, continuous protection over the entire cable length, rather than detection at a single fixed point.
Power, petrochemicals, transport, logistics and IT infrastructure.
LHS cables come in various temperature ratings depending on the environment and application. Mueller Cables' standard ratings are 68°C, 78°C, 88°C, 110°C, 138°C and 187°C; contact us for other ratings.
Length varies by application; cables are often available in runs of 1,000 metres or more. Mueller Cables' standard supply length is 1500 m ± 0.5% per reel - consult us for project-specific zone lengths.
No - they are threshold devices. They detect when a specific temperature is reached but cannot measure varying temperatures along their length.
Most are compatible, but it is essential to verify compatibility with your suppression panel or fire alarm system in advance.
Installation is not overly complex, but it benefits from professional guidance to ensure system reliability and compliance.
Contact / RFQ
Call, WhatsApp, email, or send the form below with your requirement.
