ELIS PLZEŇ a. s.
Design, Assembly and Service Manual
Page 12 of 69
Electromagnetic flowmeter FLONET FN20xx.1
ELIS PLZEŇ a. s., Luční 425/15, 301 00 Plzeň, Czech Republic, Phone: +420/377 517 711, Fax: +420/377 517 722
Es90420K/c
4.1.3. Selection of electrode material
Measurement electrodes are made of stainless steel 1.4571 (316Ti) or Hastelloy C276. However, for special
applications it may be necessary to select a material of higher quality. On request, the meter manufacturer
may supply electrodes made of platinum-rhodium (PtRh10), tantalum and titanium.
4.1.4. Selection of sensor tube lining
The sensor lining material selection depends on the operational parameters of the measured liquid.
Hard rubber (HR)
Hard rubber is suitable for almost all applications in the water industry. It can be used also for acids and
alkalis of medium concentration and with operating tempe5 °C to 80 °C (41 °F to 176 °F).
Soft rubber (SR)
Soft rubber with a high abrasion resistance is suitable for less chemically aggressive and non-oxidation
environments containing abrasive particles. It also withstands dilatation and rapid temperature changes in
the range -35 °C to 80 °C (-31 °F to 176 °F).
Rubber for drinking water
Suitable for almost all applications in the water industry where a drinking water certificate is required. It can
be used also for acids and alkalis of medium concentration and with operating tempe5 °C to 80 °C
(41 °F to 176 °F).
PTFE
PTFE lining is a universal solution for highly corrosive liquids and temperatures ranging from –20 °C to
+110 °C (-4 °F to 230 °F), on request -35°C up to +150 °C (-31 °F to 302 °F). Typical application is in the
chemical and food processing industry.
E-CTFE
E-CTFE lining is a universal solution for flowmeters from DN 300 and higher for corrosive liquids and
temperatures ranging from -20 °C to +110 °C (-4 °F to 230 °F), on request from -35 °C up to 130 °C (-31 °F
to 266 °F). Typical application is in the chemical processing industry.
4.1.5. Compact and remote version
The remote version is used at locations where ambient temperature e50 °C (122 °F). In such cases,
the transmitter must be placed at a “remote” place where the ambient temperature never exceeds 50 °C (122
°F). The remote transmitter is connected with the sensor by a connecting cable. For all places with ambient
temperature below 50 °C (122 °F) is suitable the compact version.
It is important to mention that with an increasing ambient temperature decreases measurement accuracy.
To prevent electromagnetic interference in the connecting cable, the sensor and remote transmitter should
be located as close as possible to one another. The maximum cable length depends on the conductivity of
the measured liquid (see the following diagram).
