The 25997 is a version of the CR200X intended for OEMs. It does not have a label so that the OEM can attach their own branding. The 25997 is our lowest-cost data logger available for our OEMs. Its single-ended input channel configuration and packaging are optimal for measuring one or two simple sensors. However, the 25997 does not make differential measurements and is not compatible with SDM devices, multiplexers, or thermocouples. (Refer to the Compatibility information for compatible sensors and peripherals.) Recalibration services are not offered for these data loggers.