The Data Logger with 8 input channels and the Data Logger with 16 input channels. Both have 16 MB internal memory as well as capacity for external storage mediums such as CF or SD card; and USB memory. The analog input section accepts DCV, Thermocouple and RTD with measurement intervals from 100ms(8 channel only), and 200ms up to 1 hour (both models). The digital input section can support 1 channel for pulse input and 2 channels for logic inputs. In addition, alarm summaries, log displays and review functions can be retained and displayed in this powerful, but compact portable data logger(weighs 28 ounces w/o battery).