Two programs use the C1! SDI-12 instruction to measure the RangeVue-series sensors. One program is for the CR350 data logger and one program is for the CR1000X data logger. The program sets the Stage_Reference value to 15.25. This value needs to be changed to your stage reference value. Also, the SDI-12 address is entered as a constant with a value of 0. If the SDI-12 address of the sensor has been changed from the default value, this value needs to be changed to match the sensor address. The program sets the Sensor_Units variable to feet (option 1), which needs to be changed if using other units. See comments in the program for details.