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Mass Flow ONLINE BV
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MASS-FLOW ONLINE BV
www.massflow-online.com
E.GVL.1109.A
ｩBHT2009-052
> Dimensions and weights Lite version
> Indicated pulse unit Lite version
> Tubing guidelines Lite version
Required straight tube lengths Lite version
> Electrical connection Lite version
> Process connections (in/out)
Each model has an PPS-Resin R male thread type. NPT or Rc
female thread is also available as an option. The connectors
will be supplied in stainless steel thereby eliminating the risk
of damaging threads when using metallic tubing.
> Pressure drop (all models)
Pressure loss calculation formula
> Installation conditions (all models)
All information is subject to change without notice.
Nominal Scaled pulse Unscaled pulse Frequency @ max.
size (mm) [l/pulse] (nominal) [ml/pulse] flow rate [Hz]
4 n.a. 0.890 320
8 n.a. 4.408 350
15 n.a. 23.63 200
25 n.a. 126.6 120
Signal cable, 1 meter long
( 5.0 O.D. shielded cable)
BWN
WHT
GRN
Shielded wire
12 to 24VDC
（＋）
（−）
GND
Connect shield wire to GND.
Pulse output
(open collector)
Transmission length: 1 kilometer
(Using a cable 2.0mmｲ in conductor area)
9 8 0 0
（ mm） torque (N・cm)
L1 L2
D: Flow monitor I.D.
D
Horizontal run Vertical run
With PPS male thread, avoid forcibly
tightening or excessive impact loads.
Torque to the specification given below.
R (male thread)
Nom. D R L W H1 H2 Approx.
size (meter I.D.) (conn.) weight*
4 8.5 3/8 80 32 29 68 270
8 13 1/2 80 32 29 68 270
15 14 3/4 85 32 29 68 280
25 24.5 11/4 120 46 46 85 410
Dimensions in mm, weight in g
Rc and NPT (female thread)
Nom. D Rc NPT L W H1 H2 Approx.
size (meter I.D.) (conn.) weight*
4 8.5 1/4 1/4 115 50 29 68 840
8 13 3/8 3/8 115 50 29 68 840
15 14 1/2 1/2 115 50 29 68 840
25 24.5 1 1 180 66 46 85 1740
Dimensions in mm, weight (incl. cable) in g
Secure a straight tube length 7D min. upstream of, and 3D min.
downstream of, the flow monitor.
If a throttle valve or expansion tube exists, where the flow path
cross section abruptly changes, upstream of the flow monitor,
locate it at least 50D away from the flow monitor.
Provide a throttle valve downstream of the flow monitor for regulating
the flow.
For process connection, use tubes having an inside diameter larger
than that of the flow monitor.
P : Pressure drop [kPa]
Po : Pressure drop max. of flowrate is 31 kPa for 4 mm model
and 34.3 kPa for other models
: Density of fluid at measurement [kg/m3]
o : standard density at 0ｰC and 101.3 kPa of the gas
Q : Flowrate at measurement [L/min.]
Qo : Max. flowrate (Page 2 or 4 stated value) [L/min.]
Select an installation location that meets the following requirements:
Nominal size I.D. (D) Upstream tube Downstream tube
(mm) (mm) (L1) (mm) (L2) (mm)
4 8.5 59 min. 25 min.
8 13 91 min. 39 min.
15 14 98 min. 42 min.
25 24.5 171 min. 73 min.
H2
51 36
H2
51 36
L W
H1
39
24
D
W
H1
L
39 4-M4
24
