The Lincoln Electric K940-25 STT Sense Lead Kit is a critical component for high-performance welding operations utilizing the Surface Tension Transfer (STT) process. Designed to connect directly between the workpiece and the power source, this 25-foot (7.6 meter) sense lead allows the welding machine to monitor voltage accurately at the arc, rather than at the output studs. This distinction is vital for advanced waveforms like STT, where millisecond-level adjustments to current and voltage are required based on the real-time state of the weld puddle.
In standard welding setups, the resistance inherent in welding cables can cause a voltage drop, leading to discrepancies between the machine's output and the actual energy delivered to the weld. The K940-25 eliminates this variable, providing the feedback loop necessary for the Invertec STT II, Power Wave 355M, and Power Wave S350 to function as intended. By ensuring the power source reads the true arc voltage, operators achieve superior arc stability, reduced spatter, and consistent penetration, particularly in open root passes and thin-gauge applications.
This kit includes the 25-foot cable and necessary connection hardware. It is built to withstand the rigors of industrial environments, featuring durable insulation that resists cuts, abrasion, and heat. Whether you are setting up a new STT workstation or replacing a damaged lead, the K940-25 is the OEM solution for maintaining the precision and reliability that Lincoln Electric systems are known for.
| Additional Information |
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| Brand:Lincoln Electric |
| Packaging Description:pack of 1 (pack-of-1) |
| Length:25 ft |
| Compatible Machines:Invertec STT II, Power Wave 355M, Power Wave S350 |
| Function:Voltage Sensing, Arc Monitoring |
| Process:MIG (GMAW), MIG (GMAW) STT |
