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Connecting Bare Wire Sensor to Jack Adapter

Home › Forums › Mayfly Data Logger › Connecting Bare Wire Sensor to Jack Adapter

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    • 2021-03-04 at 3:35 PM #15203
      Cheryl Nolan
      Participant
        I have a bare 4-wire CTD sensor and and adapter with 4 connection points (screw terminals). How do I know which wire goes to which terminal. I see where the ground connects at GND (see photos) but the
        Attachments:

        1. Adapter.jpg

        2. Sensor-Wires-and-Adapter.jpg

      • 2021-03-04 at 4:02 PM #15206
        Shannon Hicks
        Moderator
          For a Meter Hydros 21 sensor, check the manual that came with the sensor to double-check that they haven’t change the wiring colors lately, but the usual pattern is red is data, white is power,
        • 2021-03-05 at 8:10 AM #15209
          BrianJastram
          Participant
            Shannon, I received 3 Meter CTD-10 (HYDROS 21) sensors this week and they did change the wire colors. For me brown is power (VCC) and orange is data (D2). I also had to use the b_address_change sketch
            • 2021-03-05 at 9:10 AM #15210
              fisherba
              Participant

                Brian, when they did this color change did they give you a pinout? (I love when they do this…)

            • 2021-03-05 at 9:14 AM #15211
              BrianJastram
              Participant

                They did not give me a pinout, I just did trial and error of figure it out. I think next time I’ll purchase a stereo jack adaptor and try connecting it to the Mayfly that way.

              • 2021-03-05 at 9:20 AM #15212
                Shannon Hicks
                Moderator
                  Thanks for the info Brian.  I heard they were switching cable outer jacket colors soon, and a few of our workshop attendees last month received Hydros 21 sensors with black cable instead of the usual
                • 2021-03-05 at 9:23 AM #15213
                  BrianJastram
                  Participant

                    Shannon, yes, the outer jacket color I received is black. Good to know about the possibility of sensor damage or bricking.

                  • 2021-03-08 at 12:41 PM #15223
                    Cheryl Nolan
                    Participant
                      I called Meter Group tech support because my manual only showed the 3.5mm jack connection, bare wires were not addressed and they confirmed your connection, Shannon. (red to D2, white to Vcc, and blac
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