The System Sensor SS-LD-68-155 digital linear heat detection cable is engineered for early-stage thermal hazard detection across large-scale industrial, commercial, and infrastructure environments. Built with a red polypropylene jacket tested to 1 kV and housing a twisted pair of low-resistance tri-metallic conductors, the cable continuously monitors ambient conditions over runs extending up to 3,000 meters (10,000 feet) per zone. Operating across an environmental temperature range from -40°C to +121°C and relative humidity levels between 90% and 98% (non-condensing), the SS-LD-68-155 reliably signals overheat conditions at a calibrated threshold of 68°C (155°F).
Industrial Cable Trays and Underground Cable Tunnels
Electrical cable risers, horizontal cable trays, and underground utility tunnels present high-density fire risks where spot-type smoke or heat detectors are impractical due to restricted clearance, dust accumulation, or localized airflows. Installed directly along cable bundles or secured to tray rungs, the SS-LD-68-155 maintains proximity to potential points of electrical failure. When an insulation breakdown or severe electrical overload raises surrounding temperatures to 68°C, the inner heat-sensitive polymer collapses immediately, forcing the sprung conductors to short and register an alarm via an addressable intelligent monitor module or conventional fire alarm panel zone.
Bulk Material Conveyor Belts and Handling Systems
Conveyor assemblies in mining, processing facilities, and heavy industrial plants are vulnerable to continuous mechanical friction from jammed idlers, seized drive rollers, and overheated bearings. The SS-LD-68-155 can be routed along the conveyor structure, idler strings, and beneath transfer chutes. Because the cable supports a 3,000-meter maximum circuit length, long-distance handling belts can be monitored as continuous zones. Its 1 kV protective outer coat and operational endurance up to 98% non-condensing humidity allow it to perform reliably in damp, dusty production plants.
High-Density Warehouse Racking Systems
In high-bay racking and vertical storage facilities, thermal updrafts and ceiling height delay the response times of traditional ceiling-mounted spot thermal or smoke detectors. Running the SS-LD-68-155 along interior rack tiers and framework levels ensures in-rack thermal monitoring directly adjacent to combustible packaging and goods. The flexible 50 mm minimum bend radius enables installers to route the cable through tight structural racking junctions without pinching the tri-metallic cores or compromising insulation integrity.
Vehicular Roads and Transportation Tunnels
Road and vehicular transit tunnels require continuous line-type heat detection capable of withstanding vehicle exhaust, elevated particulate levels, and strong forced-air ventilation. Standard point detectors suffer from rapid contamination in these environments. The SS-LD-68-155 provides uninterrupted coverage across vehicle lanes, electrical service alcoves, and tunnel maintenance runs. Regulated under UL 521 standards with FM Approval, the cable delivers fixed-point thermal alarming under voltages up to 30 V AC or 42 V DC, paired with an End-of-Line (EOL) termination box to continuously supervise line integrity against open-circuit faults.
Public Transit Escalators and Moving Walkways
Enclosed machine compartments beneath public transit escalators and passenger conveyors contain motors, drive chains, and braking assemblies operating in confined, grease-laden areas. Installing the SS-LD-68-155 within the truss and mechanical return runs provides rapid detection of localized frictional overheating prior to open ignition. The non-restorable contact mechanism initiates immediate plant shutdown or fire protective signaling when local temperatures reach 68°C.
| Application Area | Primary Risk Monitored | Key Deployment Requirement |
|---|---|---|
| Cable Trays & Tunnels | Insulation breakdown, electrical overheating | Maintain 50 mm minimum bend radius along tray rungs |
| Conveyor Belts | Bearing seizure, roller friction, belt rub | Continuous routing up to 3,000 m per detection zone |
| Warehouse Racking | Localized in-rack pallet combustion | Secure running lines through tiered storage levels |
| Road & Vehicle Tunnels | Vehicle fires, exhaust-heat entrapment | Supervised with addressable monitor module and EOL box |
| Escalator Trusses | Drive motor failure, friction in mechanical returns | Direct placement in enclosed mechanical compartments |
