Field heat treatment in large-scale installation projects, due to the extremely harsh environmental conditions and the frequent lack of maintenance technology and parts, we have designed and produced the ZWK intelligent temperature controller, which is highly versatile, high-performance, and reliable. The unit employs a temperature program control instrument (such as the Fuji PXR series or Island FP93), featuring settable process curves and automatic control functions. It operates according to the set process curve, automatically records temperatures, and ensures product quality. It can also significantly extend the lifespan of heaters. The unit is compatible with various heaters for preheating before welding and heat treatment after welding. The number of temperature control points can be customized by the user, and the output voltage is equipped with a 0-220VAC voltage regulation function. The 30KW and 60KW models are portable.