✅ Professional Compensation Cable Manufacturer in China
We are a professional manufacturer of thermocouple extension and compensating cables for EPC projects, power plants, petrochemical, oil & gas, steel, metallurgy, and industrial temperature measurement applications. Our compensation cables are designed to connect thermocouples to measuring instruments, compensating for temperature variations at the connection points to ensure accurate and reliable temperature readings. All products comply with IEC 60584-3, GB/T 4989, and project-specific standards, available for K, S, R, E, T, J, N type thermocouples.
| Parameter | Specification |
|---|---|
| Standard | IEC 60584-3 / GB/T 4989 |
| Thermocouple Types | K, S, R, E, T, J, N (custom types available) |
| Cable Types | Extension (X) / Compensating (CA/CB) |
| Conductor Material (Extension) | Same alloys as thermocouple (KX, EX, JX, TX, NX) |
| Conductor Material (Compensating) | Substitute alloys with matching EMF (SC, KC, NC, KCA, KCB) |
| Conductor Size | 0.2mm², 0.5mm², 0.75mm², 1.0mm², 1.5mm², 2.5mm² |
| Core Count | 1 pair ~ 30 pairs (customizable) |
| Insulation Material | PVC / PE / XLPE / PTFE / Silicone / Glass Fiber |
| Sheath Material | PVC / PE / LSZH / Silicone / Glass Fiber / Stainless Steel Braid |
| Shielding | Unshielded / Copper Wire Braid Shield / Aluminum Foil Shield + Drain Wire |
| Armor | Steel Tape Armored / Steel Wire Armored (optional) |
| Temperature Range | -40°C ~ +200°C (standard) / -60°C ~ +400°C (high-temp) |
| Accuracy Class | Class 1 (Precision) / Class 2 (Standard) per IEC 60584-2 |
| Color Code | IEC 60584-3 / DIN 43714 / ANSI MC96.1 |
| Application | Power plants, petrochemical, steel, metallurgy, EPC projects, kilns, furnaces, temperature monitoring systems |
* Custom specifications are available upon request for EPC project tenders.
| Model | Type | Thermocouple | Application |
|---|---|---|---|
| KX | Extension | K (NiCr-Ni) | Highest accuracy, wide temp range |
| KCA / KCB | Compensating | K (NiCr-Ni) | Cost-effective, 0~150°C range |
| SC | Compensating | S / R (PtRh-Pt) | High-temp applications, 0~100°C |
| EX | Extension | E (NiCr-CuNi) | High output, wide temp range |
| JX | Extension | J (Fe-CuNi) | Cost-effective, -40~200°C |
| TX | Extension | T (Cu-CuNi) | Highest low-temp accuracy |
| NX | Extension | N (NiCrSi-NiSi) | High stability, oxidation resistance |
| NC | Compensating | N (NiCrSi-NiSi) | Cost-effective for N type |
| BC / RCA / RCB | Compensating | B / R | High-temp platinum thermocouples |
| Feature | Extension Cable (X) | Compensating Cable (CA/CB) |
|---|---|---|
| Conductor Material | Same alloys as thermocouple[reference:0][reference:1] | Substitute alloys with matching EMF[reference:2][reference:3] |
| Accuracy | Higher (Class 1)[reference:4] | Lower (Class 2), typically double tolerance[reference:5] |
| Cost | Higher[reference:6] | More cost-effective[reference:7][reference:8] |
| Temperature Range | Wide, up to thermocouple range[reference:9] | Narrow, typically 100~200°C max[reference:10][reference:11] |
| Identification | Letter "X" (e.g. KX, EX, JX)[reference:12] | Letter "C" (e.g. KCA, SC, NC)[reference:13][reference:14] |
| Recommended For | Critical, high-accuracy applications | General industrial, cost-sensitive projects |
Q1: What is a compensation cable?
A: A compensation cable (also called compensating cable) is a specialized electrical cable used to connect a thermocouple to a measuring instrument. It compensates for temperature variations at the connection points, ensuring accurate temperature readings. Compensating cables use substitute alloys that have similar thermoelectric characteristics to the thermocouple within a specified temperature range[reference:15][reference:16].
Q2: What is the difference between extension cable and compensating cable?
A: Extension cables (X) use the exact same conductor alloys as the thermocouple, offering higher accuracy and wider temperature range[reference:17][reference:18]. Compensating cables (CA/CB) use substitute alloys with matching EMF characteristics, are more cost-effective, but have lower accuracy and narrower temperature range (typically 100~200°C max)[reference:19][reference:20]. Extension cables are identified with "X" (e.g. KX), compensating cables with "C" (e.g. KCA)[reference:21][reference:22].
Q3: What standards do your compensation cables comply with?
A: Our compensation cables are manufactured in compliance with IEC 60584-3 (international standard for thermocouple extension and compensating cables)[reference:23][reference:24] and GB/T 4989 (Chinese national standard for thermocouple compensating cables)[reference:25]. We also support DIN 43714, ANSI MC96.1, and JIS C 1610 standards upon request[reference:26].
Q4: What thermocouple types are compatible with your compensation cables?
A: We supply compensation cables for all major thermocouple types including: K (KX, KCA, KCB), S/R (SC, RCA, RCB), E (EX), T (TX), J (JX), and N (NX, NC)[reference:27][reference:28]. Custom types are available upon request.
Q5: What is the difference between KX and KCA compensation cables?
A: KX is an extension cable using the same NiCr-Ni alloys as the K-type thermocouple, offering highest accuracy and wide temperature range[reference:29][reference:30]. KCA is a compensating cable using substitute alloys (Fe-CuNi), which is more cost-effective but has lower accuracy and a narrower compensation range (0~150°C)[reference:31][reference:32]. Choose KX for critical measurements, KCA for general industrial applications.
Q6: What accuracy classes are available for compensation cables?
A: Per IEC 60584-2, we supply two accuracy classes: Class 1 (Precision) with tighter tolerance for critical temperature measurement, and Class 2 (Standard) for general industrial applications[reference:33][reference:34]. Class 1 is typically recommended for EPC projects and quality-critical processes.
Q7: What conductor sizes are available for compensation cables?
A: Standard conductor sizes include 0.2mm², 0.5mm², 0.75mm², 1.0mm², 1.5mm², and 2.5mm²[reference:35]. The most commonly used size for industrial applications is 1.5mm²[reference:36].
Q8: What insulation materials are available for compensation cables?
A: We offer multiple insulation options: PVC for general use (-10°C ~ +70°C), PE for better electrical properties, XLPE for higher temperature resistance, PTFE for high-temp and chemical resistance, Silicone for flexibility at extreme temperatures, and Glass Fiber for high-temperature applications up to 400°C[reference:37].
Q9: What is the temperature range for compensation cables?
A: The temperature range depends on the cable type and insulation material. Standard compensation cables operate from -40°C to +200°C[reference:38]. High-temperature versions with glass fiber or PTFE insulation can operate from -60°C to +400°C. Compensating cables (CA/CB) typically have a narrower compensation range of 0~150°C or 0~200°C[reference:39].
Q10: What is the color code for compensation cables?
A: Color coding follows IEC 60584-3 standards[reference:40][reference:41]. For example: KX — green/white/green sheath[reference:42]; SCA — orange/white/orange[reference:43]; JCA — black/white/black[reference:44]; NCA — pink/white/pink[reference:45]. We can also supply cables with ANSI or DIN color codes upon request[reference:46].
Q11: What is the difference between SC, RCA, and RCB compensation cables?
A: All three are compensating cables for S and R type platinum-rhodium thermocouples[reference:47]. SC uses Cu/Cu-Ni alloys[reference:48]. RCA and RCB are variations with different tolerance grades[reference:49]. These are used in high-temperature applications such as steelmaking, glass manufacturing, and heat treatment furnaces where S/R type thermocouples are commonly employed.
Q12: Do you offer shielded compensation cables?
A: Yes. We offer compensation cables with copper wire braid shielding for EMI protection, aluminum foil shielding with drain wire for electrostatic shielding[reference:50], and combined shielding for maximum interference protection in industrial environments with high electrical noise.
Q13: Do you offer armored compensation cables?
A: Yes. For harsh industrial environments, we offer steel tape armored (STA) and steel wire armored (SWA) compensation cables[reference:51]. Armored cables provide mechanical protection against crushing, impact, and rodents, making them ideal for direct burial, cable trays, and heavy industrial applications.
Q14: What is the difference between single-pair and multi-pair compensation cables?
A: Single-pair cables contain one pair of conductors for a single thermocouple connection. Multi-pair cables contain multiple pairs (up to 30 pairs)[reference:52], allowing multiple thermocouple signals to be transmitted in a single cable—saving space, reducing installation cost, and simplifying cable management in large-scale EPC projects with hundreds of temperature measurement points[reference:53].
Q15: What are the typical applications of compensation cables?
A: Compensation cables are widely used in power plants (boiler temperature monitoring), petrochemical plants (reactor and pipeline temperature), steel and metallurgy (furnace and kiln temperature), oil & gas (process temperature measurement), EPC projects (temperature instrumentation systems), and scientific research laboratories[reference:54][reference:55].
Q16: What tests are performed on compensation cables before delivery?
A: We conduct comprehensive quality tests including: (1) Conductor resistance test — per IEC 60584; (2) Insulation resistance test; (3) Voltage test — 500V AC for 1 minute; (4) Thermoelectric EMF test — verifying accuracy against standard thermocouple values[reference:56]; (5) Physical property tests — insulation thickness, tensile strength, elongation; and (6) Flame retardant test — per IEC 60332.
Q17: Do you support EPC projects with technical documentation?
A: Yes. We provide full technical support for EPC projects, including datasheets, type test reports, factory acceptance tests (FAT), material traceability documentation, EMF calibration certificates, and customized cable design based on project thermocouple schedules and instrumentation diagrams[reference:57]. We are a trusted partner for global EPC contractors in power, petrochemical, and industrial sectors.
Q18: What is the typical lead time for compensation cable orders?
A: Typical lead time is 15~20 days after order confirmation, depending on quantity and specifications. Large-volume EPC project orders may require additional lead time. Samples and small quantities can be delivered within 7~10 days.
Q19: Can you provide custom compensation cable designs for specific projects?
A: Yes. We offer fully customized compensation cable solutions including custom conductor sizes, core counts, insulation/sheath materials, shielding types, armor, color codes, temperature ranges, and special markings. Our engineering team works closely with EPC contractors to develop cables that meet specific project technical specifications and thermocouple compatibility requirements.
Q20: What is the minimum bending radius for compensation cables?
A: The minimum bending radius depends on cable construction. For unarmored cables, the recommended minimum bending radius is 6× cable outer diameter (6×OD). For armored cables, it is 12×OD. Always follow manufacturer recommendations to prevent conductor damage and maintain accuracy.
Send your project specification, thermocouple schedule, or instrumentation diagram. Our engineering team will reply with a customized BOM, datasheet & EMF calibration certificate within 24 hours.
WhatsApp / Zalo: +86 17856068126 | Email: [email protected]
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