⚡ Thermocouple Wire Welder Model 300

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$1,975.00
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SKU: THEACC001
Provided: Each

Thermocouple Wire Welder Model 300
Precision Argon Gas Welder for Thermocouple Wire Joining


Quick Specs

📦 Provided: Each
🔌 Power Supply: 115 VAC / 60 Hz (Made in U.S.A.)
📏 Wire Capacity: Joins 36–20 AWG thermocouple wires
🧪 Thermocouple Types: J, K, T, E, N, B, R/S
💨 Gas Requirement: Argon Gas (with Regulator & Hose Assembly)
🔩 Gas Fitting Size: 5/8"–18 RH (right-handed)
📐 Dimensions: 8.75 × 6.25 × 6.75 in (222 × 159 × 171 mm)
⚖️ Weight: 10 lb (160 oz)


Key Features

✅ Professional-grade thermocouple wire welder for precision junctions
✅ Welds fine wire sizes from 36 to 20 gauge with clean, reliable results
✅ Compact, durable U.S.-made construction for long service life
✅ Produces all major thermocouple types (J, K, T, E, N, B, R/S)
✅ Simple 120 V plug-in operation — no special outlet required
✅ Requires Argon Gas for consistent, oxidation-free welds


Required Accessories (Sold Separately)

🔧 Argon Regulator — SKU THEACC005
🧵 Hose Assembly — SKU THEACC004


📦 Browse the related products below to find compatible thermocouple wire, calibration tools, and accessories that integrate seamlessly with this welder.

🛒 Add to Cart Now or 📞 Call 1-800-TIP-TEMP for expert guidance.

Special Order: Terms & Conditions Apply.

Notable Features

The 300 is designed for sensor manufacturers who want to produce commercial-grade thermocouple junctions, and for users of large numbers of exposed junction thermocouples, such as test and development laboratories where multipoint temperature sensing of test pieces is required.

No special skills are needed and most people will be capable of producing quality work with minimal practice. The instrument is operated via the front panel, and is suitable for welding wires up to 1.1 mm (0.043") in diameter and has an argon gas shield facility.


  • Part Number: THEACC001
  • Dimensions: 8 3/4" x 6 1/4" x 6 3/4" (222.25 x 158.75 x 171.45 mm)
  • Weight: 10 lbs (160 oz.)
  • Power: 115 VAC 60 Hz.
  • Makes all type of thermocouples: J K T E N B and R/S
  • The use of Argon Gas is required to use this equipment.
  • Gas fitting size: 5/8" - 18 right-handed
  • Model 300 Welder 120V
  • Tungsten Element
  • Wire Holder
  • Expert Technical Support
  • Argon Tank should be ordered locally.
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