Power usage of 16A/32A basic & metered single-phase PDUs and IT racks can now easily be tracked with PowerZook; a cost-effective, non-invasive, power monitoring sensor that provides power data via SNMP. PowerZook can be installed without system downtime and simply clips around the outside of PDU input cables to monitor the power draw for loads of up to 32A. PowerZook provides a smart alternative to smart PDU's where system downtime and/or higher costs are not viable options.