Endress+Hauser Cerabar T PMC131 - Function and System Design; Device Selection; Measuring Principle

Cerabar T
Endress+Hauser 3
Function and system design
Device selection
Measuring principle PMC131
The measuring pressure causes a slight deflection of the ceramic diaphragm of the sensor. The pressure-
proportional change in capacitance is measured at the electrodes of the ceramic sensor. The ceramic sensor is
a dry sensor, i.e. no fill fluid is required for the pressure transfer. This makes the sensor completely suitable for
vacuums. Extremely high stability, comparable with the material Alloy, is achieved by using ultrapure
Ceraphire
®
as the ceramic.
PMP131 and PMP135 with analog output
The process pressure acting upon the metallic separating diaphragm of the sensor is transmitted to a resistance
bridge via a fluid. The pressure-proportional change of the bridge output voltage is measured and processed
further.
PMP131 and PMP135 with switch output
The process pressure acting upon the metallic separating diaphragm of the sensor is transmitted to a resistance
bridge via a fluid. A differential amplifier creates a standard signal from the pressure-proportional change in
output voltage of the bridge. A comparator with an adjustable hysteresis compares this signal with the pre-set
switch point and then activates the transistor output.
Cerabar T PMC131 PMP131 PMP135
P01-PMC131xx-14-xx-xx-xx-000 P01-PMP131xx-14-xx-xx-xx-000 P01-PMP135xx-14-xx-xx-xx-000
With capacitive measuring
cell and ceramic measuring
diaphragm (Ceraphire
®
)
With piezoresistive
measuring cell and metallic
measuring diaphragm
With piezoresistive measuring cell
and metallic measuring
diaphragm for hygienic
applications
Field of
application
Absolute pressure and gauge
pressure
Absolute pressure and gauge
pressure
Absolute pressure and gauge pressure
in hygienic processes
Output Current output 4 to 20 mA – Current output 4 to 20 mA
– Voltage output 0 to 10 V
– Switch output PNP
–4 to 20 mA
– Switch output PNP
Process
connection
Thread:
–G ½
– ½ MNPT and ¼ FNPT
– G ½, bore 11 mm
Thread:
–G ½
– ½ MNPT and ¼ FNPT
– ½ MNPT, bore 4 mm
–G ¼
– ¼ MNPT, bore 3.5 mm
– M 20 x 1.5
Hygiene:
– Clamp DN 22 (¾")
– Tri-Clamp DN 25 to 38 (1" to 1½")
– Tri-Clamp DN 40 to 51 (2")
–G 1
– SMS 1½"
Measuring
range
–1 to 0 bar/–100 to 0 kPa
up to
0 to 40 bar/0 to 4 MPa
0 to 1 bar/0 to 100 kPa
up to
0 to 400 bar/0 to 40 MPa
0 to 1 bar/0 to 100 kPa
up to
0 to 40 bar/0 to 4 MPa
Process
temperature
–20 to +100 °C –25 °C to +70 °C –25 to +100 °C
(+135 °C for max. 1 hour)
ENDRESS+HAUSER
CERABAR T
ENDRESS+HAUSER
CERABAR T
ENDRESS+HAUSER
CERABAR T