Package Price:
$67.61/1 per eachUsually ships within 3-5 business days
The Hypertherm 128639 Cap Sensor Switch Replacement Kit is an essential maintenance component designed to restore the safety and functionality of legacy Hypertherm Powermax plasma cutting systems. This kit is engineered specifically for the T60, T80, and T100 series torches, which are standard equipment on the Powermax1000, Powermax1250, and Powermax1650 systems, respectively. It also services the RT60 and RT80 retrofit torches used on older Powermax600, 800, and 900 units. As a genuine OEM part, it guarantees precise fitment and adherence to the original safety specifications of the equipment.
The cap sensor switch serves a critical role in the safety interlock circuit of the plasma cutter. Its primary function is to detect the presence and proper installation of the retaining cap. If the cap is loose, missing, or removed for consumable changes, this switch opens the circuit, preventing the power supply from sending high-voltage DC to the torch. Over time, the mechanical microswitch or its actuating mechanism can wear out, become clogged with metal dust, or fail due to thermal cycling. A failed switch often results in the machine displaying a "cap sensor" fault code (often a specific LED pattern on the front panel) even when the cap is fully tightened, effectively rendering the machine unusable until the part is replaced.
This replacement kit includes the necessary components to replace the faulty sensor assembly within the torch handle or machine torch shell. It is compatible with both hand and machine torch variants, including the T100M, T80M, and T60M. Maintaining the integrity of this safety circuit is not only a matter of operational uptime but also of operator safety, ensuring that the arc cannot initiate while internal live parts are exposed. For industrial MRO environments, stocking this part is recommended for fleets utilizing the Powermax 1000/1250/1650 series to minimize downtime caused by sensor fatigue.
The 128639 kit is verified for use with the following torch assemblies:
| Additional Information |
|---|
| Brand:Hypertherm |
| Item:Cap Sensor |
| Weld Process:Plasma Arc Welding (PAW) |
| Packaging Description:pack of 1 |
| Compatible Models:Powermax1000, Powermax1250, Powermax1650, Powermax1100 |
| Torch Compatibility:T60, T80, T100, RT60, RT80 |
| Product Type:Safety Interlock Switch |
