YSI IDS ProOBOD [626500] ProOBOD Optical BOD Probe With 2m Cable. The YSI ProOBOD Optical BOD Probe is designed for use with all models of the YSI MultiLab, including the 4010-1W, 4010-2W, and 4010-3W. Optical, luminescent technology eliminates the probe warm-up period and membrane changes. The self-stirring BOD probe has a super quiet lab stirrer that helps ensure a representative sample and improves DO response times. The IDS sensors automatically store their unique serial number and calibration data. In addition, they also digitally process the measurement signal. The sensors can be moved from instrument to instrument and maintain their calibration data and transmit this information to the new instrument.