I removed all of the sensors and connected the white to H, blue and brown to (-) and (+) 18V, and then connected blue to every possible configuration of L and GND. I still have not had luck. Would you recommend changing the flow sensor settings to current output and trying to use the resistor and connect it that way? I called the manufacturer and they said to connect it with "Brown to 18V+, Blue to 18V-, black (or white if it is configured that way) to the DAQ input, and then the blue wire to negative on the DAQ." What does negative on the DAQ correspond to? Whenever I connect blue to 18V- and GND, the other sensors go haywire (and I did unplug all of the other sensors and try this, it still did not work)