Installation Instructions

Micropilot FMR20 Modbus RS485
Endress+Hauser 21
Process
Process temperature, process
pressure
p
-40
+80 ( 76)+1
0 ( )+32
T
p
[ °F ]°C ( )
-1( )-14.5
0
[bar ](psi)
3 (43.5)
A0029007-EN
 22 FMR20: Permitted range for process temperature and process pressure
Process temperature range
–40 to +80 °C (–40 to +176 °F)
Process pressure range, threaded process connection
• p
rel
= –1 to 3 bar (–14.5 to 43.5 psi)
• p
abs
< 4 bar (58 psi)
Process pressure range, UNI flange process connection
• p
rel
= –1 to 1 bar (–14.5 to 14.5 psi)
• p
abs
< 2 bar (29 psi)
The pressure range may be further restricted in the event of a CRN approval.
Dielectric constant
For liquids
ε
r
≥ 4
For dielectric constants (DC values) of many media commonly used in various industries refer
to:
• the Endress+Hauser DC manual (CP01076F)
• the Endress+Hauser "DC Values App" (available for Android and iOS)