Self-Regulating Heat Cable BSX™
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Thermon BSX™ Self-Regulating Heat Tracing Cable
Thermon BSX™ is a world-class self-regulating heating cable designed specifically for freeze protection and process temperature maintenance of metallic and non-metallic piping, tanks, and industrial equipment.
The heat output of the BSX™ cable automatically adjusts in response to temperature variations along the entire circuit. When the heat loss of the equipment increases (due to falling ambient temperatures), the cable’s heat output automatically increases. Conversely, as ambient temperature rises and thermal losses decrease, the cable reduces its heat output accordingly. This self-regulating feature ensures high energy efficiency and prevents localized overheating.
Thermon BSX™ is certified for use in both ordinary (unclassified) areas and potentially explosive atmospheres (Hazardous Areas). The cable is low-maintenance, easy to install on-site, and does not require steam cleaning.
1. Thermon BSX™ Cable Construction & Materials
- Nickel-Plated Copper Bus Wires (16 AWG / 1.3 mm²): Provide superior electrical conductivity and mechanical flexibility.
- Radiation Cross-Linked Semiconductive Heating Matrix: The core self-regulating element that dynamically responds to ambient temperatures.
- Radiation Cross-Linked Dielectric Insulation: Delivers high electrical resistance and long-term dielectric durability.
- Tinned Copper Braid: Provides physical protection and a continuous ground path for electrical safety.
- Polyolefin Overjacket: Provides additional protection for the cable and braid against aqueous inorganic chemical exposure.
2. Technical Specifications & Ratings
| Parameter | Specification / Value |
| Available Watt Densities | 10, 16, 26, 33 W/m @ 10°C (3, 5, 8, 10 W/ft @ 50°F) |
| Supply Voltages | 110–120 Vac or 208–277 Vac |
| Max. Maintenance Temperature | 65°C (150°F) |
| Max. Continuous Exposure Temperature (Power-off) | 85°C (185°F) |
| Minimum Installation Temperature | -51°C (-60°F) |
| Minimum Bend Radius | • 10 mm (0.38”) @ -15°C (5°F) • 32 mm (1.25”) @ -60°C (-76°F) |
| Hazardous Area T-Rating | • 10, 16, 26 W/m: T6 (85°C / 185°F) • 33 W/m: T5 (100°C / 212°F) |
3. How It Works & Key Advantages
Self-Regulating Principle
The semiconductive matrix core contains microscopic conductive carbon paths between the two bus wires.
- Cold Conditions: The matrix contracts, opening many conductive paths -> Electrical current increases -> Heat output rises.
- Warm Conditions: The matrix expands, disrupting conductive paths -> Electrical current decreases -> Heat output drops.
Key Benefits
- Overlap Safety: Because of its self-regulating nature, BSX™ cable can be overlapped on valves, flanges, and piping without risk of thermal burnout or hot-spot degradation.
- Cut-to-Length Flexibility: Can be cut to the exact length required in the field without altering the power output per unit length.
- Energy Savings: Automatically delivers heat only where and when needed along the piping run.
4. Typical Industrial Applications
- Freeze Protection: Water supply lines, fire protection systems (PCCC), and process water lines in oil & gas refineries, chemical processing plants, power plants, and food & beverage facilities.
- Low-Temperature Maintenance: Maintaining process fluid viscosity (e.g., light oils, aqueous solutions) to ensure continuous flow and prevent crystallization or condensation.
- Hazardous Environment Deployment: ATEX, IECEx, FM, and CSA certified for hazardous location classified zones.
5. What is Heat Tracing?
Electric Heat Tracing is an engineered system designed to compensate for the heat lost through thermal insulation on piping, vessels, and process equipment. By replacing lost heat energy, heat tracing systems maintain fluid temperatures, prevent freeze-ups, maintain fluid viscosity, and ensure smooth plant operations.
6. Product Comparison: Thermon BSX™ vs. HTSX™
If your operating process requires higher temperature exposure or steam purging capability, consider Thermon HTSX™:
- BSX™: Max. maintenance temp 65°C (150°F), max. exposure temp 85°C (185°F) (Ideal for freeze protection & low-temperature maintenance).
- HTSX™: Max. maintenance temp 150°C (302°F), max. exposure temp 250°C (482°F) (Suitable for high-temperature maintenance and continuous steam purge conditions).
Authorized Sales Agent in Vietnam, Laos, and Cambodia
We are the official commercial representative and authorized distributor for Thermon (USA) electric heat tracing solutions across Vietnam, Laos, and Cambodia.
Our Services Include:
- Genuine Thermon heating cables (BSX™, HTSX™, KSX™, RSX™) and connection accessories (Power Connection / End Seal Kits).
- Heat loss calculation, thermal design engineering support, and official Technical Datasheets.
Contact Information
- Commercial Representative: Mr. Trung Hung
- Email: Hung.tran@wili.com.vn
- WhatsApp / Zalo / Phone: +84 903 710 753
