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Reference Manual
00809-0100-4811, Rev DA
Appendix A: Reference Data
January 2015
Reference Data
Vented flanges
Available with Masoneilan and Fisher vented flanges. Vented flanges must be ordered as
accessories with a 1½-in. NPT threaded process connection (code RA); see “Ordering
information” on page 152. As an alternative to a vented flange, it is possible to use a flushing
connection ring on top of the standard nozzle.
Probe versions
Coaxial, rigid twin, rigid single and segmented rigid single lead, flexible twin and flexible single
lead.
For guidelines on which probe to select depending on application, see the Guided Wave Radar
Application Guidelines Technical Note (document number 00840-2600-4811).
For interface measurements the rigid single probe is the best choice for chamber mounting. The
twin or coaxial probe is the preferred choice for clean, low dielectric constant liquids.
Material exposed to tank atmosphere
Material model code 1: 316 or 316L SST (EN 1.4404), PTFE, PFA, and O-ring materials
Material model code 2: Alloy C-276 (UNS N10276), PTFE, PFA, and O-ring materials
Material model code 3: Alloy 400 (UNS N04400), PTFE, PFA, and O-ring materials
Material model code 7: PTFE
Material model code 8: PTFE, 316 or 316L SST (EN 1.4404), and O-ring materials
Pressure Equipment Directive (PED)
Complies with 97/23/EC article 3.3
Total probe length
This is defined from the upper reference point to the end of the probe (weight included, if
applicable).
Figure A-17. Total Probe Length
Select the probe length according to the required measuring range (the probe must be hung
and fully extended through the entire distance where level readings are desired).
Total probe length
NPT
BSP/G
Flange
Tri-Clamp
Upper reference point
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