Product description
Deltabar PMD78B HART
12
Hauser
Applications for diaphragm seals
Diaphragm seal systems are used if the process and the device need to be separated.
Diaphragm seal systems offer clear advantages in the following instances:
• In the case of extreme process temperatures - through the use of temperature isolators
or capillaries
• In the case of strong vibrations - decouple the process from the device by using a
capillary
• In the case of aggressive or corrosive media - through the use of high-durability
membrane materials
• In the case of media that crystallize or contain solids - through the choice of suitable
coatings
• In the case of heterogeneous and fibrous process media
• If extreme measuring point cleaning is necessary, or in the event of very damp mounting
locations
• For mounting locations that are difficult to access
3.1.2
Level measurement (volume and mass):
Diaphragm seal on both sides with temperature isolator
h =
∆
p
ρ g
+ -
+
–
h
A0038339
h
Height (level)
Δp Differential pressure
ρ
Density of the medium
g
Gravitation constant
Diaphragm seal on both sides with capillary
+-
–
+
h =
∆
p
ρ
g
h
A0038345
h
Height (level)
Δp Differential pressure
ρ
Density of the medium
g
Gravitation constant