As part of the McElroy product line, Gajeske rents and sells the DataLogger system. The system is used to record and document key parameters of the fusion process. This cost-effective device can be used to verify that proper fusion procedures have been followed prior to installation. The DataLogger unit consists of a rugged handheld computer that serves as the recording device, which collects the information and then records the heater temperature and fusion pressure profile over time. All data is recorded and transmitted to the handheld computer where the joint report can be stored, viewed, printed or transferred to a desktop computer for archiving.