Completely electronically redesigned, the MTOL+ online process turbidimeter employs a 32 bit ARM Core Processor. You're now able to log/store a year's worth of measurement/calibration data, install software updates via a USB flash drive and download data. The unit features simultaneous 4 to 20 mA and Modbus signal outputs, and variable user-selectable logging interval from 1 to 60 minutes. Arrives ready to accommodate a range of 0 to 100 NTU; calibration files enabling 0 to 10 NTU and 0 to 1000 NTU are included on a USB key.