Table 8-4: Measurement commands
SDI-12 command
Response format
Values
Time to
respond
(s)
1
Basic Measurement
(ft/m)
2
aM!
aMC!
aC!
aCC!
0+sss.ss+ddd.dd
+vv.vvv+ee
Stage, distance, voltage, and error
code
1
NOAA Tide Monitoring
(ft/m)
2
aM1!
aMC1!
aC1!
aCC1!
0+sss.ss+σσ.σσ
+oo+gg+vv.vv+ee
When the sensor first powers up
and finds all of the the parameters
it will set the measurement buffer
size for the command based on
the number of measurements each
is configured. Then once the
buffers are full the sensor can
return a 360 s average
3
within 1 s.
Returns: mean stage, standard
deviation, # of outliers, # of good
readings, voltage, and error code
1
CS475A Radar Water Level Sensor
39