Onset introduces a series of high-performance, split-core current transformers for measuring AC current and amperage in commercial building energy audits, building commissioning studies and other applications. The Accu-CT Series current sensors are available in 20-, 50-, 100-, and 250-amp models, all offering outstanding performance and one-handed operation. The current transformers are compatible with Onset HOBO stand-alone data loggers, web-based monitoring systems, and wireless data nodes. 


Key advantages include:

•             Revenue-grade accuracy  

•             Window opening 0.75 inch

•             Easy open and installation with one hand, even while wearing safety gloves

•             Outstanding angle phase angle accuracy – essential for accurate energy measurements

•             IEEE C57.13 and IEC 600440-1 accuracy – over full temperature range and down to 1% of rated current