System Sensor SS-LD / SS-LDN Linear Heat Detection Cable Alternative — TEBAOFLEX Specification Review
Need to source a cable against a System Sensor SS-LD or SS-LDN linear heat detection reference? This TEBAOFLEX enquiry page organizes the 68, 78, 88 and 105°C fixed-action models, the standard and nylon-covered versions, and the alarm-loop details that must be checked before a replacement is specified. The reference values below describe the original System Sensor family; they are not TEBAOFLEX product ratings or approvals.
- Reference function: two-conductor, fixed-temperature linear heat detection, not heat tracing.
- Original reference series: SS-LD general-purpose and SS-LDN nylon-covered harsh-area cable.
- Reference action temperatures: 68, 78, 88 and 105°C; the action temperature is not a continuous-use rating.
- Original 2020 datasheet lists 30 V AC / 42 V DC maximum and 3,000 m maximum zone length.
- Compare the alarm panel, end-of-line arrangement, maximum ambient temperature, route length and installation jurisdiction before ordering.
Send the exact label or part number, roll length, panel/interface drawing and required approval with your RFQ.
Match an SS-LD or SS-LDN alarm cable by its system requirements
A linear heat detector forms part of a fire-alarm circuit: its heat-sensitive layer changes at a selected action temperature so the connected monitor can recognize an alarm. A buyer looking for System Sensor SS-LD or SS-LDN usually needs more than a matching red or white jacket. The detector element, action threshold, wiring resistance, interface and permitted installation must all fit the existing design. TEBAOFLEX handles this as a specification-review enquiry; the named System Sensor models remain reference identifiers rather than TEBAOFLEX SKUs.
The supplied 2020 Notifier document groups standard SS-LD and nylon-covered SS-LDN at 68, 78, 88 and 105°C. The nylon covering is an additional protection route for harsher exposure. A separate 2014 document lists a different 105°C suffix, so a photograph of the installed cable marking is more reliable than assuming two suffixes are interchangeable.
- Identify the installed product: provide the complete SS-LD or SS-LDN reference and roll or zone length.
- Check the alarm circuit: give the panel/module type, end-of-line components and allowable loop electrical values.
- Check the hazard: provide the highest normal ambient temperature and the required action threshold.
- Check acceptance: specify the project jurisdiction and the exact listing or approval required for the complete detection system.
Use the Specifications tab to compare original-model numbers. For an electrical cable intended to produce heat, see self-regulating heat-trace cable; it performs a different function.
Construction
The 2020 System Sensor reference describes a low-resistance twisted pair of tri-metallic conductors separated by heat-sensitive polymer. At the selected action temperature, conductor contact initiates the alarm signal through a compatible panel circuit. The SS-LD reference has a general-purpose protective coat; SS-LDN adds nylon outside the detection element. Construction details for a TEBAOFLEX quotation must be confirmed from its own drawing, particularly the conductor pair, polymer action point, finished diameter and jacket material.
| Original reference element | Function to match in a replacement review |
|---|---|
| Twisted conductor pair | Continuity and alarm contact behavior within the specified monitoring circuit |
| Heat-sensitive polymer | Defined action temperature and suitable normal ambient margin |
| SS-LD protective coat | Mechanical protection for the specified general-purpose route |
| SS-LDN nylon overcoat | Additional covering for a harsher chemical or mechanical exposure route |
Applications
The source positions SS-LD / SS-LDN linear heat detection along routes where a point detector may not cover the hazard continuously. It gives conveyor belts and escalators, cable trays and tunnels, warehouse racks, roads and tunnels as examples. Choose the action temperature against the route's highest expected normal ambient temperature and use only with a validated fire-alarm interface and the applicable local installation design.
- Continuous route monitoring: cable tunnels, trays and conveyors where the monitored path matters more than one sensor point.
- Environmental choice: SS-LD for the referenced general-purpose route; SS-LDN when the nylon-overcoated reference is the specified target.
- System boundary: provide panel input, end-of-line method, zone length and approvals before substituting any fire detector component.
Specifications
The tables identify original System Sensor reference models from the supplied 2020 Notifier datasheet. They are an RFQ comparison checklist, not a TEBAOFLEX rating or stock list. The suffix x denotes a source-listed 100, 200, 500 or 1,000 m roll; the exact current part number and requested length should be checked against the installed label.
| Original reference model + action specification | Covering route | Action temperature | 2020 source roll lengths |
|---|---|---|---|
| SS-LD-68-155-x — 68°C linear heat detector | General purpose | 68°C | 100 / 200 / 500 / 1,000 m |
| SS-LD-78-172-x — 78°C linear heat detector | General purpose | 78°C | 100 / 200 / 500 / 1,000 m |
| SS-LD-88-190-x — 88°C linear heat detector | General purpose | 88°C | 100 / 200 / 500 / 1,000 m |
| SS-LD-105-220-x — 105°C linear heat detector | General purpose | 105°C | 100 / 200 / 500 / 1,000 m |
| SS-LDN-68-155-x — 68°C nylon-covered detector | Nylon overcoat | 68°C | 100 / 200 / 500 / 1,000 m |
| SS-LDN-78-172-x — 78°C nylon-covered detector | Nylon overcoat | 78°C | 100 / 200 / 500 / 1,000 m |
| SS-LDN-88-190-x — 88°C nylon-covered detector | Nylon overcoat | 88°C | 100 / 200 / 500 / 1,000 m |
| SS-LDN-105-220-x — 105°C nylon-covered detector | Nylon overcoat | 105°C | 100 / 200 / 500 / 1,000 m |
Original-family electrical and installation reference
| Original reference property | Source value |
|---|---|
| Maximum circuit voltage, 2020 source | 30 V AC / 42 V DC |
| Maximum zone length, 2020 source | 3,000 m |
| Minimum bend radius, 2020 source | 50 mm |
| Resistance, 2020 source | Approximately 100 Ω/km |
| Capacitance, 2020 source | 88–150 pF/m |
| Inductance, 2020 source | 540–1,050 nH/m |
| Normal ambient, 68/78°C references | −40 to +45°C |
| Normal ambient, 88/105°C references | −40 to +70°C |
| Nominal diameter, 2014 source | 3.60 ± 0.12 mm base; 4.50 ± 0.12 mm with additional nylon/polypropylene coat |
The 2014 source additionally names SS-LD-105-221, SS-LDN-105-221 and stainless-covered SS-LDS models. These are document-version references; no equivalence to the 2020 -220 suffix is asserted.
Standards
The original System Sensor source identifies its LD/LDN products as UL/FM approved and CE-marked/RoHS-compliant. Those statements describe the original product named in the reference documents. A TEBAOFLEX-supplied detector and its alarm-system pairing require their own applicable documents for the buyer's jurisdiction.
| Reference document | What it states | RFQ document to identify |
|---|---|---|
| Notifier DOC-02-122, June 2020 Rev C | UL/FM approved, CE marked and RoHS compliant for the original LD/LDN family; 1 kV-tested protective coating is a test description, not the 30 V AC / 42 V DC circuit rating | Requested product listing, model scope and panel compatibility |
| System Sensor LHS datasheet, May 2014 V2 | Original range listed UL/FM and cited NFPA 70 / NFPA 72 for installation | Project installation code, approval body and accepted detector assembly |
For life-safety use, agree the detector, interface, end-of-line arrangement and approval scope before the final quotation.
Request a cable recommendation and quotation
Send the required services, cable length, mechanical duty, environment, termination and quantity. Our team will review the application before quoting.
- Include the product name or SKU plus the required cable length and quantity.
- Attach a specification, drawing or data sheet when available.