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Reference Manual
00809-0100-4811, Rev DA
Appendix A: Reference Data
January 2015
Reference Data
Figure A-14. Maximum Measuring Range, Flexible Twin Lead Probe
Note
For other product combinations, consult your local Emerson Process Management
representative.
A.2.3 Environment
Vibration resistance
Polyurethane-covered aluminum housing: IEC 60770-1. SST housing: IACS E10
Electromagnetic compatibility
Emission and Immunity: meets EN 61326-1 (2006) and amendment A1, class A equipment
intended for use in industrial locations if installed in metallic vessels or still-pipes.
When rigid/flexible single and twin lead probes are installed in non-metallic or open vessels,
influence of strong electromagnetic fields might affect measurements
Built-in lightning protection
Meets EN 61000-4-4 Severity Level 4 and EN 61000-4-5 Severity Level 4
Coating
See Table A-6 on page 131.
Single lead probes are preferred when there is a risk for contamination (because coating
can result in product bridging across the two leads for twin versions; between the inner
lead and outer pipe for the coaxial probe)
PTFE probes are recommended for viscous or sticky applications. Periodic cleaning
might be required
For viscous or sticky applications, it is not recommended to use centering discs
mounter along the probe
Maximum error due to coating is 1 to 10% depending on probe type, dielectric
constant, coating thickness, and coating height above product surface
82.0 (25)
78.7 (24)
75.5 (23)
72.2 (22)
68.9 (21)
65.6 (20)
0 (0) 3.3 (1)
6.6 (2)
9.8 (3)
13.1 (4) 16.4 (5)
Upper product
dielectric constant
Max. upper product thickness,
ft. (m)
2
3
5
Maximum measuring range,
flexible twin lead probe, ft. (m)
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