1 Introduction
ApplicationThe Micropilot FMR 231 is a loop-powered transmitter. It is used to for continuous
non-contact level measurement of liquids, pastes and sludges. It is suitable for use in:
•
storage tanks, buffer tanks and stilling wells
with few internal fittings and where the product surface is generally calm. Changes of
product, temperature gradients, inert gas blankets or vapours do not influence the
measurement.
VersionsThe various Micropilot FMR 231 versions result from the combinations between antenna
type, inactive length and the process connection. Table 1.1 summarises them. The
product structure is described in Chapter 9.
BA171Y05
➀
➁
BA171Y06
Fig. 1.1
➀
Storage tank
➁
Stilling well or bypass pipe
Application
Standard, for tanks and stilling wells Hygienic, corrosive-resistant, for tanks
and stilling wells
Housing
Housing F12 (standard/EEx ia/Ex IS) or housing T12 (standard/EEx e/Ex XP)
Antenna type
PPS antenna PTFE antenna
Inactive length
100 mm/250 mm
Process connection
Thread 1½ BSPT (R 1½) or 1½ NPT, PVDF
Flange DN50/80/100150/ or ANSI/JIS equivalent
Sanitary coupling: dairy, Tri-clamp or aseptic
Cladding
uncladded cladded or uncladded
Pressure/
flange temperature
0...16 bar
–20°C...+120°C
0...16 bar with cladded flange
0...40 bar uncladded flange
–40°C...+150°C
Wetted parts
PPS, Viton O-ring,
1.4435 flange/thread
Uncladded: PTFE und 1.4435
flange/thread
Cladded: PTFE only
PPS = Polyphenylene sulphide
Table 1.1
Micropilot FMR 231 versions
Micropilot FMR 231 Chapter 1 Introduction
Endress+Hauser 5
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