Cerabar M PMC51, PMP51, PMP55
46 Endress+Hauser
Applications with jumps in temperature
Extreme jumps in temperature can result in temporary measuring errors. Temperature compensation
takes effect after several minutes. Internal temperature compensation is faster the smaller the jump
in temperature and the longer the time interval involved.
For further information please contact your local Endress+Hauser Sales Center.
PMP51 (with metallic process isolating diaphragm)
Designation Temperature operating range
Process connections with internal process isolating diaphragm –40 to +125 °C (–40 to +257 °F)
Process connections with flush-mounted process isolating
diaphragm
–40 to +100 °C (–40 to +212 °F)
Hygienic process connections –40 to +130 °C (–40 to +266 °F)
For a maximum of 60 minutes: 150 °C (302 °F)
PMP55 (with diaphragm seal)
Depends on diaphragm seal and filling oil: –70 °C (–94 °F) up to +400 °C (+752 °F). Observe the
temperature application limits → 115.
Devices with PTFE coated process isolating diaphragm
The non-stick coating has excellent gliding properties and is used to protect the process isolating
diaphragm against abrasive media.
NOTICE
Destruction of the device due to incorrect use of PTFE foil!
‣
The PTFE foil is designed to protect the unit against abrasion. It does not provide protection
against corrosive media.
Range of application of the PTFE foil
For the range of application of the 0.25 mm (0.01 in) PTFE foil on an AISI 316L (1.4404/1.4435)
process isolating diaphragm, see the following diagram:
[°F]
[psi p ]
g
0
725
1450
2175
2900
3625
-40 77 122 167 212 257
302
347
392
A0026949-EN
For vacuum applications: p
abs
≤ 1 bar (14.5 psi) to 0.05 bar (0.725 psi) up to max.
+150 °C (302 °F).
Process temperature limits of
flexible capillary armoring:
PMP55
• 316L: No restrictions
• PTFE: No restrictions
• PVC: See the following diagram
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