Honeywell SmartLine SLG 700 User Manual page 176

This illustrates a properly assembled coaxial probe with an empty tank. The spacers are
visible on the probe every meter but their heights are small (<1000 counts). The large
reflection at 6 m is the end of the probe.
This illustrates the importance of proper nut placement. The biggest effect is from a nut
missing altogether
SLG 700 SmartLine Level Transmitter User's Manual
Page 160 Revision 8