Proline Promass 40E
4
Hauser
Input
Measured variable
• Mass flow (proportional to the phase difference between two sensors mounted on the measuring
tube to register a phase shift in the oscillation)
• Volume flow (calculated from mass flow and fluid density. The density is proportional to the
resonance frequency of the measuring tubes).
• Measuring tube temperature (by temperature sensors) for calculatory compensation of temperature
effects.
Measuring range
Measuring ranges for liquids
Measuring ranges for gases
The full scale values depend on the density of the gas. Use the formula below to calculate the full scale
values:
max(G)
=
max(F)
·
ρ
(G)
÷ x [kg/m³]
max(G)
= max. full scale value for gas [kg/h]
max(F)
= max. full scale value for liquid [kg/h]
ρ
(G)
= Gas density in [kg/m³] at operating conditions
Here,
max(G)
can never be greater than
max(F)
Calculation example for gas:
• Sensor type: Promass E, DN 50
• Gas: air with a density of 60.3 kg/m³ (at 20 °C and 50 bar)
• Measuring range (liquid): 70000 kg/h
• x = 125 (for Promass E DN 50)
Max. possible full scale value:
max(G)
=
max(F)
·
ρ
(G)
÷ x [kg/m³] = 70000 kg/h · 60.3 kg/m³ ÷ 125 kg/m³ = 33800 kg/h
Recommended full scale values
See information in the "Limiting flow" section
→
17
DN
Range for full scale values (liquids)
min(F)
to
max(F)
[mm]
[in]
[kg/h]
[lb/min]
8
³
⁄
₈
0 to 2000
0 to 73.50
15
½
0 to 6500
0 to 238.9
25
1
0 to 18000
0 to 661.5
40
1 ½
0 to 45000
0 to 1654
50
2
0 to 70000
0 to 2573
80
3
0 to 180000
0 to 6615
DN
x
[mm]
[in]
8
³
⁄
₈
85
15
½
110
25
1
125
40
1 ½
125
50
2
125
80
3
155
