Function And System Design; Device Selection; Measuring Principle - Endress+Hauser Cerabar T PMC131 Technical Information

Cerabar T

Device selection

Measuring principle

Endress+Hauser

Function and system design

Cerabar T PMC131
ENDRESS+HAUSER
CERABAR T
P01-PMC131xx-14-xx-xx-xx-000
With capacitive measuring
cell and ceramic measuring
diaphragm (Ceraphire
Field of Absolute pressure and gauge
application pressure
Output Current output 4 to 20 mA
Process Thread:
connection – G ½
– ½ MNPT and ¼ FNPT
– G ½, bore 11 mm
Measuring –1 to 0 bar/–100 to 0 kPa
range up to
0 to 40 bar/0 to 4 MPa
Process –20 to +100 °C
temperature
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.
PMP131
P01-PMP131xx-14-xx-xx-xx-000
With piezoresistive
measuring cell and metallic
®
) measuring diaphragm
Absolute pressure and gauge
pressure
– Current output 4 to 20 mA
– Voltage output 0 to 10 V
– Switch output PNP
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
0 to 1 bar/0 to 100 kPa
up to
0 to 400 bar/0 to 40 MPa
–25 °C to +70 °C
PMP135
P01-PMP135xx-14-xx-xx-xx-000
With piezoresistive measuring cell
and metallic measuring
diaphragm for hygienic
applications
Absolute pressure and gauge pressure
in hygienic processes
– 4 to 20 mA
– Switch output PNP
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"
0 to 1 bar/0 to 100 kPa
up to
0 to 40 bar/0 to 4 MPa
–25 to +100 °C
(+135 °C for max. 1 hour)
3