Warning: This has a long delivery time compared to the others. The OBS501CBL-L attaches an OBS501 turbidity sensor to a datalogger. This cable has a user-specified length; lengths between 31 and 76 meters can be ordered. A user-specified cable length takes more time to manufacture.
The 33815 makes it easier for you to connect wires from multiple SDI-12 sensors into one set of terminals on a data logger. The 33815 uses six DIN-rail mountable (pn 27479) 6-wire terminal blocks. The 33815 jumpers two connectors together at a time (pn 32918). This setup allows up to 11 SDI-12 sensors to be connected to one set of terminals on a data logger.
The 27781 provides a recalibration of the OBS501. The 13-point calibration uses six calibration standards for backscatter, six calibration standards for side scatter and a zero point in clear water for both sensors. Before and after calibration sheets are supplied. All factory recalibrations require an RMA (Returned Material Authorization).