Welcome to EnviroDIY, a community for do-it-yourself environmental science and monitoring. EnviroDIY is part of WikiWatershed, an initiative of Stroud Water Research Center designed to help people advance knowledge and stewardship of fresh water. Thanks again. We’ll probably stick with the SP-110 since we have a few already in the lab. I found in a datalogger manual that they recommend using it as a single-ended analog sensor, where the positive wire is the signal and the negative wire is an additional ground. I saw in the ADS1x15 library that there is a folder for singleended. Would I just follow that example and keep the wiring the same? Or would I wire both “ground” wires to the ground pin (black wire on the starter kit)?
Thanks for the response. We’re using an Apogee SP-110, which is self-powered (doesn’t draw from the battery) and provides output in the range of 0-250 mV. The 3 wires go to a positive and negative signal from the sensor and a ground.
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