Thermocouple Cable
Thermocouple cables are used to connect thermocouples to measuring instruments. The products are mainly used in various temperature measuring devices and have been widely used in nuclear power, petroleum, chemical, metallurgy, electric power, and other sectors. ZMS cable is the leading manufacturer. Our thermocouple wire products are available in high value-added high-grade stainless steel and special alloys, steel strip-based systems, and industrial heating solutions. We manufacture many types of thermocouple wires. Including thermocouple cable k-type, thermocouple cable type j, t-type thermocouple wire, etc.
Thermocouple Cable Types
The role of the thermocouple compensation wire cable is to extend the cold end of the hot electrode, i.e., the mobile thermocouple, to connect with the display instrument to form a temperature measurement system. Thermocouple compensation wire is generally used in thermocouples. We can provide 2 wire 3 wire 4 wire thermocouple cables, and the best thermocouple cable prices. Also, we provide customization service for thermocouple extension wire, you can provide the following detailed parameters: 1. conductor size and type. 2. insulation and sandwich material. 3. shielding material. 4. color.
1. FB insulation + FB insulation + SS braid
2. Conductor: NiCr-NiSi
3. Color: Red +, Black –
4. Size: 2*7*0.2mm
1. PVC insulation + Silicone rubber
2. Conductor: Iron-CuSi
3. Color: Red +, Purple –
4. Size: 2*7*0.5mm
1. PVC insulation + Silicone rubber
2. Conductor: Fe-CuNi
3. Colour: Red +, Purple –
4. Size: 2*7*0.3mm
1. PVC insulation + PVC insulation
2. Conductor: Cu-CuNi
3. Colour: Red +, White –
4. Size: 2*7*0.1mm
1. PVC insulation + Cooper wire braid
2. Conductor: Cu-CuNi
3. Color: Red +, Blue –
4. Size: 2*1mm
1. FB insulation+Cooper wire braid+FB insulation
2. Conductor: Fe-CuNi
3. Color: Red +, Yellow –
4. Size: 2*7*0.2mm
1. PVC insulation+SS braid+Silicone rubber insulation
2. Conductor: Cu-CuNi
3. Color: Red +, Green –
4. Size: 2*7*0.2mm
1. PVC insulation + PTFE insulation
2. Conductor: Cu-CuNi
3. Color: Red, Blue, Blue
4. Size: 3*7*0.2mm
Single Pair Flat High Temperature Glass Insulated Thermocouple Cable
Conductor: Solid. Material depends on type of thermocouple.
Insulation: High temperature glass
Sheath: High temperature glass
Construction: Flat
Color: According to IEC 60584-3
This type of cable is connected to a thermocouple to measure temperature.
Type: K, E, J, N
Single Pair Flat FEP Insulated Cable
Conductor: Solid. Material depends on type of thermocouple.
Insulation: FEP
Sheath: FEP
Construction: Flat
Color: according to standard IEC 60584-3
The FEP model has cables that are connected to thermocouples to measure temperature.
Type: K, E, J
Multi-Pair Split-Shield/Total-Shield Thermocouple Cable
Conductor: Solid
Insulation: PVC, PE, XLPE or LSZH
Sub-shielding: 24μm aluminum or PETP tape plus 0.6mm diameter solid tinned copper drain wire
Winding: At least one layer of plastic tape
Total shield: 24 μm aluminum or PETP tape plus 7 strands of tinned copper drain wire with a cross-sectional area of 0.5 mm².
Jacket: PVC or LSZH
Flame retardation: IEC 60332-1
Temperature range: Operating temperature -30°C to 70°C, Installation temperature -5°C to 50°C.
These cables are used in thermocouple circuits, petrochemical plants, utilities, and industrial plants.
Model: KX, EX, JX, TX, NX, KCA, KCB, RCA, RCB, SCA, SCB, BC
Split-Shield/Total-Shield Armored Lead Sheathed Thermocouple Cable
Conductor: Solid
Insulation: PVC, PE, XLPE or LSZH
Sub-shielding: 24μm aluminum or PETP tape plus 0.6mm diameter solid tinned copper drain wire
Winding: At least one layer of plastic tape
Total shielding: 24 μm aluminum or PETP tape plus 7 strands of tinned copper drain wire with a cross-sectional area of 0.5 mm².
Inner jacket: PE, PVC or LSZH
Lead jacket: lead alloy
Armoring: Galvanized steel wire
Flame retardation: IEC 60332-1
Temperature range: operating temperature -30°C to 70°C. installation temperature -5°C to 50°C.
The cables are connected to different electric thermocouples in cable trays or ducts for industrial process control, refineries, and oil and gas plants. Excellent resistance to corrosion, moisture, and vibration.
Model: KX, EX, JX, TX, NX, KCA, KCB, RCA, RCB, SCA, SCB, BC
International Thermocouple Color Code
Thermocouple extension and compensating cable are pairs of conductors, each made of a different material. The thermocouples must be selected according to the relevant temperature, the operating environment, and the physical characteristics of the components.
These materials are manufactured according to the internationally recognized standard specified in IEC 584 1,2, which is based on the international practical temperature standard ITS 90. The maximum operating temperature depends on the thickness of the thermocouple conductors. Thermocouple types can be subdivided into 2 groups, base metals and rare (precious metals).
A major advantage of thermocouple type J (Iron (JP)/Cuprothal® (JN)) is the ability to work in both oxidizing and reducing atmospheres. Covering the iron with copper prevents corrosion during the shelf life. Although the traditional J-type is still popular in temperature measurement, it is less important in mineral insulated forms due to its limited temperature range – 200C to +750°C. Type J is still mainly in use, based on the widespread use of older instruments calibrated for this type. Their sensitivity rises to 55µV/°C.
The Insulation Material of Thermocouple Cable
The Primary Factors Affecting Thermocouple Life
Temperature: If the temperature rises by 50°C, then the thermocouple life will be shortened by about 50%.
Diameter: If the wire diameter doubles, then the thermocouple life will be extended by 2 to 3 times.
Thermal cycling: If the thermocouple is subjected to thermal cycling from room temperature to over 500°C, then the life of the former will be reduced by about 50% compared to a thermocouple used continuously at the same temperature.
Protection: If the thermocouple is covered with a protective sleeve and placed in a ceramic insulator, then its life will be significantly extended.
Thermocouple Compensation Wire Instructions For Use
Select thermocouple compensation wire to know the thermocouple compensation wire in the ambient temperature and site mining conditions, according to the site ambient temperature situation to choose the appropriate compensation wire sheath, the general ambient temperature in -25 ~ 105 ℃, choose polyvinyl fluoride sheath, the ambient temperature in -60 ~ 205 ℃, choose polytetrafluoroethylene as compensation wire sheath, and in -60 ~ 260 ℃, choose Polytetrafluoroethylene as a thermocouple compensation wire sheath. So in the selection must pay attention to the site mine situation.
| Which insulation material? | Useable temperature range | Application notes |
| PVC | -10°C to 105°C | Good general purpose insulation for ‘light’ environments. Waterproof and very flexible. |
| PFA (Extruded) | -75°C to 250°C | Resistant to oils, acids, other adverse agents and fluids. Good mechanical strength and flexibility. PTFE better for steam/elevated pressure environments. |
| PTFE (taped & wrapped) | -75°C to 250/300°C | Resistant to oils, acids, other adverse agents and fluids. Good mechanical strength and flexibility. |
| Glass fibre (Varnished) | -60°C to 350/400°C | Good temperature range but will not prevent ingress of fluids. Fairly flexible but does not provide good mechanical protection. |
| High temperature glass fibre | -60°C to 700°C | Will withstand temperature up to 700°C but will not prevent ingress of fluids. Fairly flexible, doesn’t provide good protection against physical disturbance. |
| Ceramic Fibre | 0 to 1000°C | Will withstand high temperature, up to 1000°C. Will not protect against fluids or physical disturbance. |
| Glass fibre (varnished) stainless steel overbraid | -60°C to 350/400°C | Good resistance to physical disturbance and high temperature (up to 400°C). Will not prevent ingress of fluids. |
| For maximum accuracy extension cables should be used and terminals and connectors should be of thermocouple materials to maintain continuity. | ||
Notes On Thermocouple Compensation Wire
1. Selection of Thermocouple Compensation Wire
Thermocouple compensation wire must be used according to the type of thermocouple used and the occasion used to make the correct choice. For example, k-type couples should choose k-type couples compensation wire, according to the use of the occasion, and choose the operating temperature range. Usually, kx working temperature of -20 ~ 100 ℃, a wide range of -25 ~ 200 ℃. The error of the ordinary level is ± 2.5℃, and the precision level is ± 1.5℃.
2. Contact Connection
With the thermocouple terminal 2 joints as close as possible, try to keep the temperature of the two joints the same. Connected with the instrument terminals as much as possible at the same temperature, the instrument cabinet has a fan, and the contact point should be protected from the fan blowing directly to the contact point.
3. Use a Length
Because the thermocouple signal is shallow, microvolt level, if the distance used is too long, the attenuation of the signal and the environment of strong electrical interference coupled, enough to make the signal distortion of the thermocouple, resulting in an inaccurate measurement and control temperature, in control of serious temperature fluctuations.
According to our experience, usually using the thermocouple compensation wire length control within 15 meters is better, if more than 15 meters, it is recommended to use the temperature transmitter for signal transmission. A temperature transmitter is the temperature of the corresponding potential value into DC transmission, strong anti-interference.
4. Wiring
Armored multicore thermocouple cable or compensation wiring must be away from power lines and interference sources. In places where crossing can not be avoided, also as far as possible use the crossway, not parallel.
5. Shielded Compensation Wire
To improve the anti-interference thermocouple connection line, you can use a shielded compensation wire. For the scene with more interference sources, the effect is better. However, the shield must be strictly grounded, otherwise, the shield not only does not play the role of shielding but enhances the interference.
Service of ZMS Cable Company
Over Productions Service: ZMS has a wide range of cable and conductor products for you to choose from. We will provide caring services and professional project solutions for everyone who needs them.
Quality Certification Services: ZMS cable products are manufactured according to GB, IEC, BS, NFC, ASTM, DIN, and other international standards. Our technical team can customize cable products that meet your requirements according to your needs.
Profession Customer Service: ZMS provides free professional consulting services to provide you with one-stop project solution services and rapid product delivery solutions.
Delivery And Shipping Services: While we at ZMS provide high-quality cables, we also provide good delivery solutions. While ensuring the safe delivery of products, we provide the best packaging and transportation solutions, greatly reducing customers’ transportation costs.
Packaging of ZMS: ZMS cable packaging is provided in the form of wooden reels, corrugated boxes, and coils. The cable ends are sealed with BOPP self-adhesive tape and a non-hygroscopic sealing cap to protect the cable ends from moisture. We can print the required marks on the outside of the barrel with waterproof material according to customer requirements.
