Proline Promass E 100 Modbus RS485
Technical data
Hauser
93
Sensor housing
The sensor housing is filled with dry nitrogen gas and protects the electronics and
mechanics inside.
If a measuring tube fails (e.g. due to process characteristics like corrosive or abrasive
fluids), the fluid will initially be contained by the sensor housing.
In the event of a tube failure, the pressure level inside the sensor housing will rise
according to the operating process pressure. If the user judges that the sensor housing
burst pressure does not provide an adequate safety margin, the device can be fitted with a
rupture disk. This prevents excessively high pressure from forming inside the sensor
housing. Therefore, the use of a rupture disk is strongly recommended in applications
involving high gas pressures, and particularly in applications in which the process pressure
is greater than 2/3 of the sensor housing burst pressure.
Burst pressure of the sensor housing
If the device is fitted with a rupture disk (order code for "Sensor option", option CA "Rupture
disk"), the rupture disk trigger pressure is decisive .
The sensor housing burst pressure refers to a typical internal pressure which is reached
prior to mechanical failure of the sensor housing and which was determined during type
testing. The corresponding type test declaration can be ordered with the device (order code
for "Additional approval", option LN "Sensor housing burst pressure, type test").
DN
Sensor housing burst pressure
[mm]
[in]
[bar]
[psi]
8
³⁄₈
250
3
620
15
½
250
3
620
25
1
250
3
620
40
1½
200
2
900
50
2
180
2
610
80
3
120
1
740
For information on the dimensions: see the "Mechanical construction" section of the
"Technical Information" document
Rupture disk
To increase the level of safety, a device version with a rupture disk with a trigger pressure
of 10 to 15 bar (145 to 217.5 psi)can be used (order code for "Sensor option", option CA
"rupture disk").
The use of rupture disks cannot be combined with the separately available heating jacket.
Flow limit
Select the nominal diameter by optimizing between the required flow range and
permissible pressure loss.
For an overview of the full scale values for the measuring range, see the "Measuring
range" section → 83
Summary of Contents for Proline Promass E 100
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