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The Lincoln Electric K940-25 STT® Sense Lead Kit is a 25-foot (7.6 m) voltage sensing cable designed to provide real-time arc voltage feedback directly from the workpiece to the power source. This accessory bypasses voltage drops inherent in standard welding cables, allowing the power source to monitor voltage at the arc rather than at the output studs. This feedback loop is required for advanced waveforms like Surface Tension Transfer (STT), enabling millisecond-level adjustments to current and voltage based on the real-time state of the weld puddle.
Features
Real-time arc voltage feedback for precise waveform control
Eliminates voltage drop variables from long welding cables
Enables millisecond-level adjustments to current and voltage
Monitors voltage at the arc rather than output studs
Spatter reduction
Arc stability enhancement
Consistent penetration control
Durable industrial-grade insulation
OEM connection hardware included
Specifications
Manufacturer: Lincoln Electric
Part Number: K940-25
Length: 25 ft (7.6 m / 8 m)
Weight: 1.32 lb
Packaging: 1 per pack
Compatible Processes: MIG (GMAW), MIG (GMAW) STT
Compatible Machines: Invertec STT II, Power Wave 355M, Power Wave S350, Power Wave systems
