The HOBO by Onset SD-CT is a self-describing current transformer sensor available in five current ranges (Amps AC) for use with the HOBO MX1104 and MX1105 multi-channel data loggers. This split-core AC current transformer offers integrated strain relief, so the probe is secured to the logger. And it features Self-Describing technology to automatically communicate configuration information to the logger without any programming or extensive user setup.