FM0101/0102/0103/0105 SEriES
Small Karman Vortex Flow Meter for Liquids
A
FM0101/0102/0103/0105 Series
KOFLOC's Karman Vortex Flow Meter FM Series provides
an ideal tool for measuring and monitoring liquid flows, including cooling water and cleaning water. Since PPS resin
is used for body material, all models of the series offer superior reliability and durability.
Features
•Simple design that minimizes a dead space
•Measurements of very small flows available (up to 0.5 L/min)
•Use of PPS resin has achieved a small, lightweight and rigid.
•The sensor can be used for pure water or deionyzed water and
chemicals (the sensor is acid-/alkali-resistant).
•These models are in the process of application for CE Marking.
Standard Specifications
FM0101
FM0102
FM0103
Dimension (a)
17.8
17.5
17.5
32.5
Dimension (L)
80.6
80.0
80.0
110.0
R3/8
R1/2
R1/2
25A
0.5-4 L/min
2-16 L/min
4-40 L/min
10-150 L/min
Fluids for measurement
Cooling water, cleaning water, etc.
Measuring accuracy
Within ±3.0% F.S
Repeatability
Within ±0.5% F.S
Dimensions
FM0101-S-S-P
Without indicator
S Type: 4-20mA
12.
5
P Type: Pulse (Open collector) (For w/o indicator only)
D Type: With indicator
X (Connection)
12-24VDC
Liquid temperature range
0-70°C
Proof pressure
1MPa
Amb. temperature range
0-50°C
Amb. humidity range
5-90%RH
Applicable cleanliness/
waterproofing standards
IP64 (Splashproof construction per JIS C 0920)
Material for wetted part
PPS with 30% glass mixture
Cable length
Weight
Without indicator
5
3
Supply voltage
FM0105-S-S-P
a
45
About 2000
Outputs
a
3
0
L
4
0
49
2-Tr56.1x2.5
PPS w/o glass mixture
W/o indicator: 2 meters long; terminated/pretinned (presoldered)
With indicator: 3 meters long; terminated/pretinned (presoldered)
W/o indicator: 85 g (Sensor unit)
165 g (Sensor unit)
With indicator: 100 g (Sensor unit)
205 g (Sensor unit)
CAUTION:
DO NOT load excessive clamping torque
on the sensor unit and
setscrews as they are
made of plastics.
28.05
Flow range
Cable length
About 2000
Connection (X)
FM0105
1
2
Model
10
a
45
φ56.1
a
L
Note:
Tolerances for unspecified outside dimensions: ±0.8
Tolerances for other unspecified dimensions: ±0.4
Principle of Measurement
When a columnar object (object that generates vortices) is placed
in the flow path of a fluid, regular channels of vortices, called
Karman vortex channels, are generated at the back of the object.
Since the frequency of a vortex generated is linearly proportional
to the flow velocity within a given range, the flow amount can be
measured by counting the number of vortices.
These series models make use of this principle. When the frequency of each vortex generated is detected by the incorporated
vortex detector (piezoelectric device), the signal processing circuit outputs a signal which is linearly proportional to volume flow.
Columnar object
(that generates vortices)
Vortex detector
Karman vortices
Ordering
MODEL 01 Flow range
(PPS)
01
02
03
MODEL 01
(PPS)
05
S
Output
P
N
/K
A
C
/K
S=4−20mADC
P = Pulse
D = 4-20 mADC + Indicator
C
Output
S=4−20mADC
D=4−20mADC+ Indicator
* Refer to “Ordering” when placing an order or requesting a quotation. Fill in the blanks
in the “Order/Quotation Request Card” at the end of the catalog, and send the card by
fax.
Piezoelectric device
27
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