Heat Sensing Cable
Linear heat detection cable that senses temperature rise anywhere along its length for continuous fire protection.
Linear detectionUL 521Self-restoring
Voltage30 Vac / 42 Vdc (signal level, not power-rated)
TemperatureFixed alarm set-point of 68°C, 78°C, 88°C or 105°C (per grade selected)
StandardUL 521
Technical Specifications
| Construction | |
| Conductor | Twisted pair of tri-metallic, low-resistance sensor conductors |
| Conductor size range | N/A (fixed sensor-cable construction) |
| Number of cores/pairs | 1 twisted pair |
| Insulation | 1.1 kV tested heat-sensitive thermal polymer, colour-coded by alarm rating |
| Inner sheath | N/A |
| Shielding/screen | Unscreened (screened version on request) |
| Armour | SS wire braid (optional, for harsh/hazardous zones) |
| Outer sheath | PVC / high-temperature polymer, UV & weather resistant |
| Ratings & Standards | |
| Voltage grade | 30 Vac / 42 Vdc (signal level, not power-rated) |
| Temperature rating | Fixed alarm set-point of 68°C, 78°C, 88°C or 105°C (per grade selected) |
| Applicable standards | UL 521, EN 54-22 (linear heat detection basis) |
| Special properties | Detects a fire condition anywhere along its length (zones up to ~3000 m), ~100Ω/km loop resistance, self-restoring digital construction |
Applications
Cable trays, tunnels & conveyor belts
Coal handling & bulk material plants
Floating-roof storage tanks
Warehousing & large enclosed spaces
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