• Stainless Steel housing: IACS E10
Electromagnetic compatibility
Emission and Immunity: EMC directive 2014/30/EU, EN 61326-1:2013, and
EN61326-3-1:2006.
NAMUR recommendations: NE21
(12)
CE-mark
Complies with applicable directives (EMC, ATEX).
Built-in lightning protection
EN 61326, IEC 61000-4-5, level 2kV (6kV with T1 terminal block)
Contamination/product build-up
• Single lead probes are preferred when there is a risk of contamination (because build-
up can result in the product bridging across the two leads for twin versions; between
the inner lead and outer pipe for the coaxial versions).
• For viscous or sticky applications, PTFE probes are recommended. Periodic cleaning
may also be required.
• For viscous or sticky applications, it is not recommended to use centering discs
mounted along the single lead probe.
• Signal Quality Metrics (option code D01, or DA1) can be used to determine when to
clean the probe. Transmitters equipped with the Diagnostics Suite option can calculate
Signal Quality Metrics.
Table A-1: Maximum Recommended Viscosity and Contamination/Build-up
Probe type Maximum viscosity Contamination/build-up
Single lead 8000 cP
(1)(2)
Build-up allowed
Twin lead/Large coaxial 1500 cP Thin build-up allowed, but no
bridging
Coaxial 500 cP Not recommended
(1) Consult your local Emerson representative in the case of agitation/turbulence and high viscous
products.
(2) Be cautious in HTHP viscous or crystallizing media applications where temperature at instrument
connection is significantly lower than process temperature with risk of coating in the upper part
of probe that may reduce the measurement signal. Consider using HP or STD probes in such
applications.
A.1.3
Measuring range
See Table A-2 and Table A-3 for each probe’s measuring range and minimum dielectric
constant. Due to the measuring range depending on the application and factors described
(12)
Namur NE21 not available with option code QT.
Specifications and reference data Reference Manual
April 2019 00809-0100-4530
272 Rosemount 5300 Level Transmitter
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