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Huona J-Type Thermocouple Bare Wire SWG30/SWG25/SWG19 High Thermal Sensitivity
Huona J-Type Thermocouple Bare Wire SWG30/SWG25/SWG19 High Thermal Sensitivity
Specifications
Brand Name :
Huona
Model Number :
Type J
Certification :
ISO 9001
Place of Origin :
Shanghai
MOQ :
10kg
Price :
Negotiable
Payment Terms :
L/C,Western Union,,T/T
Supply Ability :
500 tons per month
Delivery Time :
5-21 days
Packaging Details :
Carton/Wooden Case
Product Name :
Type J Thermocouple Bare Wire
Positive :
Iron
Negative :
Constantan
Diameter :
SWG30/SWG25/SWG19
EMF at 100°C (vs 0°C) :
5.268 mV
EMF at 750°C (vs 0°C) :
42.919 mV
Diameter Tolerance :
±0.01mm/±0.015mm/±0.015mm
Elongation (20°C) :
≥20%/≥22%/≥25%
Description
Huona J-Type Thermocouple Bare Wire SWG30/SWG25/SWG19 High Thermal Sensitivity
Product Overview

Type J thermocouple bare wire, a high-precision temperature-sensing element crafted by Huona New Material, consists of two dissimilar alloy conductors--iron (positive leg) and constantan (copper-nickel alloy, negative leg)--engineered for accurate temperature measurement in moderate-temperature environments. Available in three standard wire gauges: SWG30 (0.305mm), SWG25 (0.51mm), and SWG19 (1.02mm), this bare wire eliminates insulation interference, making it ideal for custom thermocouple assembly, high-temperature calibration, and applications requiring direct contact with measured media.

Standard Designations
  • Thermocouple Type: J (Iron-Constantan)
  • Wire Gauges: SWG30 (0.315mm), SWG25 (0.56mm), SWG19 (1.024mm)
  • International Standards: Complies with IEC 60584-1, ASTM E230, and GB/T 4990
  • Form: Bare wire (uninsulated, for custom insulation/protection)
  • Manufacturer: Huona New Material, certified to ISO 9001 and calibrated to national temperature standards
Key Advantages
  • Gauge-Tailored Performance: SWG30 (thin gauge) offers high flexibility for tight-space installations; SWG19 (thick gauge) provides enhanced mechanical strength for industrial environments; SWG25 balances flexibility and durability for general-purpose use.
  • Superior Thermoelectric Accuracy: Generates a stable electromotive force (EMF) with a sensitivity of ~52 μV/°C (at 200°C), outperforming Type K in the 0-500°C range, with Class 1 accuracy.
  • Bare Wire Versatility: No pre-applied insulation allows users to customize protection based on specific temperature/corrosion requirements.
  • Cost-Effective: Iron-constantan alloy is more affordable than precious metal thermocouples while delivering higher sensitivity than Type K.
  • Good Oxidation Resistance: Performs reliably in oxidizing environments up to 750°C.
Technical Specifications
Attribute SWG30 (0.315mm) SWG25 (0.56mm) SWG19 (1.024mm)
Conductor Material Positive: Iron; Negative: Constantan (Cu-Ni 40%) Positive: Iron; Negative: Constantan (Cu-Ni 40%) Positive: Iron; Negative: Constantan (Cu-Ni 40%)
Nominal Diameter 0.305mm 0.51mm 1.02mm
Diameter Tolerance ±0.01mm ±0.015mm ±0.02mm
Temperature Range Continuous: 0-700°C; Short-term: 750°C Continuous: 0-750°C; Short-term: 800°C Continuous: 0-750°C; Short-term: 800°C
EMF at 100°C (vs 0°C) 5.268 mV 5.268 mV 5.268 mV
EMF at 750°C (vs 0°C) 42.919 mV 42.919 mV 42.919 mV
Conductor Resistance (20°C) ≤160 Ω/km ≤50 Ω/km ≤15 Ω/km
Tensile Strength (20°C) ≥380 MPa ≥400 MPa ≥420 MPa
Elongation (20°C) ≥20% ≥22% ≥25%
Product Specifications
Item Specification
Surface Finish Bright annealed (oxide-free, Ra ≤0.2μm)
Supply Form Spools (length: 50m/100m/300m per gauge)
Chemical Purity Iron: ≥99.5%; Constantan: Cu 59-61%, Ni 39-41%, impurities ≤0.5%
Calibration Traceable to NIST/China National Institute of Metrology (CNIM)
Packaging Vacuum-sealed in argon-filled bags; plastic spools in moisture-proof cartons
Customization Cut-to-length (minimum 1m), special alloy purity, or pre-tinned ends
Typical Applications
  • Custom Thermocouple Assembly: Used by sensor manufacturers to fabricate probes with application-specific protection.
  • Industrial Temperature Sensing: Direct measurement in food processing and plastic molding.
  • Calibration Equipment: Reference elements in temperature calibrators.
  • Automotive Testing: Monitoring engine block and exhaust system temperatures.
  • Laboratory Research: Thermal profiling in material science experiments.

Huona New Material subjects every batch of Type J bare wire to rigorous quality testing: thermoelectric stability tests, dimensional inspection, and chemical composition analysis. Free samples (1m per gauge) and calibration certificates are available upon request.

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Huona J-Type Thermocouple Bare Wire SWG30/SWG25/SWG19 High Thermal Sensitivity

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Product Detail
Brand Name :
Huona
Model Number :
Type J
Certification :
ISO 9001
Place of Origin :
Shanghai
MOQ :
10kg
Price :
Negotiable
Contact Supplier
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Huona J-Type Thermocouple Bare Wire SWG30/SWG25/SWG19 High Thermal Sensitivity

Huona (Shanghai) New Material Co., Ltd.

Verified Supplier
2 Years
shanghai, shanghai
Since 2008
Business Type :
Manufacturer, Exporter
Main Products :
Low Expansion Alloy, Soft Magnetic Alloy, Elastic Alloy
Total Annual :
8000000-100000000
Employee Number :
100~120
Certification Level :
Verified Supplier
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