In most installations, TOR-5 is intended as a permanently mounted system for one specific transformer, because its value comes from continuous trend monitoring and long-term data history. While the hardware itself could theoretically be disconnected and moved, this is not the typical mode of use. Portability breaks trend continuity and requires repeated installation, flushing, and recalibration. For periodic checks on multiple units, portable analyzers are usually more practical, while TOR-5 is justified mainly for critical transformers that benefit from continuous online monitoring.